2008 MercedesBenz SLR McLaren Roadster | car review @ Top Speed

18 Июн 2015 | Author: | No comments yet »

Specifications:

The maximum speed of the new sports car, which is by an AMG V8 compressor engine delivering 460 hp, is 332 km/h, therefore at the same level as the coupé. Although, to its fully retractable top, the offers undiluted open-air pleasure in the highest performance its occupants in no way lose out in terms of or the vehicle’s suitability for everyday Consequently, the new Roadster opens up a new in refinement for open-top super cars.

Like the coupé the new Mercedes-Benz SLR McLaren Roadster again unites the legend of the SLR racing models from the with the innovative technology of Formula 1 vehicles from the team. Typical stylistic such as the arrow-shaped tip of the Formula 1 Arrow, establish a visual with the racing cars. The SLR of the 50s lives on stylistically in the distinctive louvers, side pipes the front wheels and the wide-opening doors.

The new Roadster benefits from the many years of of Mercedes-Benz and its Formula 1 partner Apart from two aluminium frames, its body is made of carbon-fibre reinforced plastic materials, making the vehicle an among high-performance sports Especially for the Roadster, complex technology has been intelligently developed for the monocoque chassis. The is low weight, exemplary energy and, therefore, extremely occupant safety as well as a of torsional stiffness hitherto in open-top vehicles. This to outstanding ride characteristics of the otherwise found only in super sports cars.

The top is suitable for high speeds

The qualities of the Roadster are attributable to the fully retractable top, blends harmoniously into the lines of the SLR McLaren. Its newly roof material, which is in three different colours, not guarantees complete suitability for use in all weathers, but also endows the sports car with characteristics are exception-ally unusual in a roadster. For at 332 km/h, the maximum speed is at the level of the coupé version. is still possible at well 200 km/h on open-air journeys to the favourable aeroacoustics.

The roof and closes semi-automatically in less ten seconds, thereby combining the for convenience with the puristic of the roadster. To open, the roof needs to be unlocked from the frame and be briefly raised, which it folds away Since an aluminium cover is into its front section, the elegantly closes off the top when

Sophisticated aerodynamics and racing-type

In the wind tunnel, the Roadster has optimised for high speeds regard to handling, aeroacoustics and It likewise employs the aerodynamic already known from the version, featuring an airbrake into the access lid and a diffusor in the bumper to provide increased on the rear axle.

The open is equipped with a racing-type featuring high-performance carbon-ceramic discs, thereby setting high stan-dards. Its front-mid-engine for optimum weight distribution. 460 kW/626 hp and a maximum torque of 780 Nm, the AMG V8 engine, which is coupled to an AMG R five-speed automatic transmission, the Roadster from zero to 100 in 3.8 seconds.

Unique safety and fittings

A high degree of is ensured by unique carbon-fibre elements, steel-reinforced A-pillars and two roll-over bars. The comprehensive also features adaptive knee and side airbags as as seat belt tensioners and a monitoring system.

The exclusive equipment includes semi-aniline-leather-upholstered bucket seats which can be adapted to the driver and front by means of differently sized pads; dual-zone automatic a high-quality BOSE premium system; a multifunction sport wheel with gear-change and a navigation system with radio and CD player.

The new Mercedes-Benz SLR like the coupé, is produced at Formula 1 factory in Woking, in accordance with stringent quality criteria and will be as from September 2007.

concept and design

It was in the mid-1950s the Mercedes-Benz SLR acquired a hallowed in the world of motor racing. apart from its long of legendary race victories, its technology and thrilling design transformed it into a blueprint for all Gran Turismo touring The designation SLR has possessed a magical ever since.

Charisma and technology are also the hallmarks of the new SLR McLaren Roadster, which celebrate its world premiere in 2007. Like the Coupé with which Mercedes-Benz and its 1 partner McLaren have established themselves in the exclusive car class since 2003, the new Roadster was designed and developed on the of two showcars presented in 1999. It is these that Mercedes-Benz reinvigorated the tradition of the mystical SLR after several decades and both a fixed-roof coupé and an roadster version to the public.

The new SLR McLaren Roadster also its basic concept with the in order to obtain optimum distribution for flawless handling and high braking stability, the SLR McLaren Roadster is designed as a sports car with the drive placed behind the front a suspension derived from racing and the same, powerful AMG V8 engine developing 460 kW/626 hp. The is outstanding roadholding and handling a top speed of 332 km/h and acceleration zero to 100 km/h in just 3.8

The new SLR Roadster differs from the variant in that more 500 components are either new or improved. from the soft top and its operation mainly include the boot the now frameless swing-wing doors, the wings, the A-pillars and windscreen the rollover bars and the seat anchorage points. Most of modifications and new developments were to integrate the fabric roof into the vehicle structure. the fact that the Roadster with a fully retractable top to fuse pure open-top pleasure with the ultimate in its occupants by no means have to in terms of comfort or everyday This unrivalled combination it very special even in the of super-sports cars.

The new Mercedes-Benz SLR Roadster owes its exceptional among open high-performance cars to its motor racing and the uncompromising use of high-tech materials — despite all their benefits — are generally ever found in a few individual of even premium series-production if at all, owing to the high and elaborate manufacturing processes

This is particularly true of the yet lightweight carbon-fibre composite (CFRP) that are used. and its Formula 1 partner, McLaren, gathered many years of with this material is commonly used in the aerospace In an impact, carbon fibres a level of energy absorption is four to five times than that of steel or while the weight advantage of high-tech material over is around 50 per cent.

The new high-performance capitalises on all of these benefits. As in the version, and apart from two engine frames, its body is made of this exotic This complex carbon-fibre has furthermore undergone intelligent for the Roadster’s monocoque. The result is low as well as exemplary energy courtesy of unique carbon-fibre structures, which translates excellent occupant safety, a level of torsional stiffness is unprecedented for an open-top car. gives rise to the sort of performance that is normally the of super sports cars a fixed roof.

Dramatic and top-quality appointments

As in the Coupé, the exciting design of the new was inspired by the SLR models of the 1950s and the 1 Silver Arrows. At its centre, the end is dominated by the striking, arrow-shaped it shares with the Formula 1 Arrows, which encloses the star and unmistakably confirms its and heritage. The two wings extending it ensure a high downforce at the axle, and decisively contribute to the racetrack-bred handling of the new SLR Roadster.

The of the SLR also repeated the wing in other areas of the body to design continuity: wing-shaped also divide the areas the headlamps and the front end contour, act as for the exterior mirrors and embellish the light clusters, where the LED are seated in two projecting, superimposed

Powerful contours and athletic

The wide, flat bonnet back from the large air its rear edge ending at the of the A-pillars to provide space for the deep windscreen. The rounded headlamps give way to strong which extend over the like powerful muscles and with tightly drawn to signify raw power.

The silhouette of the SLR shows muscular proportions, lines that are intentionally of the Mercedes sports cars of It is characterised by a long bonnet, a waistline, a compact passenger with a striking fabric and a short rear end with elegant LED rear light


Side gills and wide-opening doors

It is particularly the side that reveals the great racing tradition on which the of the new high-performance Roadster is based, as the SLR lives on in the form of large, air vents. These gills are far than a design feature, as their function has always to ventilate the engine compartment.

The has also been given unmistakable feature that the roadgoing coupé version of the SLR racing sports car designed by the head of the Mercedes test Rudolf Uhlenhaut, in 1955, swing-wing doors. In this interpretation the frameless doors of the are not however attached to the roof, but to the roof pillars where are able to swing forward at a angle. This concept the striking visual impact of the cars while considerably the door aperture for convenient and egress.

Puristic fabric with coupé qualities

The fabric soft-top sits on the carbon-fibre bodywork to enclose the compartment, accentuating the flowing of the Roadster. As a result the silhouette even longer than of the Coupé version, with more striking lines when the roof is open of Integrating the soft top harmoniously painstaking, detailed work by the who carefully smoothed the transitions the boot lid, roof and bulkhead so that whether the is open or closed, this too appears to have been from a single mould.

The top retracts fully in order not to the flowing contours when with the roof down. To the roof, the driver simply has to the catches in the roof frame and it up slightly; the side windows open and, once a switch in the centre console has pressed, the roof folds in a Z and stows itself away the seats on a level with the lid. For safety reasons, the can only be operated when the car is Drivers are able to make the most of every break in the as the semi-automated mechanism opens and the roof in just over ten flat, thereby harmonising the for convenience with the purist of this top-class Roadster.

The section of the roof incorporates a header bow made from Not only does this added stability, it also with the need for an additional when the roof is down, as it perfectly flush with the contours. This is once a reflection of the puristic character of the SLR

Furthermore, the hard roof the short spacing between the and the optimum attachment of the roof give the soft top on the SLR Roadster different properties from the of convertible roofs. There is of the usual ballooning at high even at top speed, its contour by just a couple of millimetres at the Drivers of the new high-performance two-seater Mercedes and McLaren can therefore it all the way to its top speed far beyond the 300 km/h with complete peace of even with the roof

However puristic the roof’s may appear it is in actual fact elaborate, with three harmonised layers that excellent insulation and therefore levels of comfort, even in weather.

Three roof and an intriguing light effect

For the top the designers chose a new, woven material with properties. This features coloured threads black and for the warp and weft, creating an light effect that with the angle of vision and a yet very elegant-looking finish, unusual surface ties in with the car’s carbon-fibre The soft- top is available in three colours — anthracite-black, and beige-black and can therefore be perfectly with the range of 13 paint and the chosen interior colour. As an alternative to the silver brake Mercedes-Benz also offers red or callipers to accentuate the high-tech and exclusivity of the car even further.

the additional weight caused by the structure, the overall weight of the car has increased at 1825 kilograms standard). The capacity of the boot is 204 (DIN), both with the open or closed. This is to stow travel bags for open-top journeys.

Honed for speeds in the wind tunnel

In of the outstanding performance of the Mercedes-Benz SLR Roadster, which is capable of well in excess of the 300 km/h particular attention was naturally to the aerodynamics. The Roadster’s handling, and aerodynamics were optimised for driving in the wind tunnel, the emphasis on safe, stable at high speeds. This that the body must not lift, but rather a downforce would press the car down the road and ensure optimal

Like the Coupé, the Roadster an almost completely smooth a front splitter, a six-channel diffuser and special air deflectors at the wheels. It therefore follows and tested design principles from Formula 1. These that the airstream beneath the flows as smoothly as possible to a speed-dependent downforce. This concept keeps the axle perfectly balanced while a high, uniform downforce at the and rear axles.

In the Roadster these forces are augmented by a Airbrake integrated into the lid. When a speed of 95 is reached, this automatically its approx. 1000 square cross-section into the slipstream at an of ten degrees, thereby increasing the pressure on the rear axle. also gives the SLR outstanding when braking from speeds. The extending spoiler acts as an airbrake: if the driver heavily on the brake pedal, the spoiler rises to an angle of 65 to increase the air resistance and move the centre of gravity further to the Both have the effect of braking performance even

In most situations the electronics control the airbrake as required. the driver may also adjust the manually by pressing the switch in the console to raise the rear to an angle of 30 degrees.

There has only been a increase in the Cd figure for the Roadster to the Coupé, measuring 0.376 the roof closed and 0.4078 the roof open (airbrake in 10 for both measurements).

The special design of this high-performance car also includes the striking pipes on each side of the a conventional exhaust system have made a smooth and an optimal diffuser design to achieve.

The aerodynamics engineers took great care to the Roadster a shining example in of its aero-acoustics. Painstakingly meticulous on the soft top bay, on the roof and on the transition point from the top to the body have cut wind substantially. As an example, the distance the roof when closed and the lid was fine-tuned with such that no additional sealing are required. The airstream felt in the compartment when the roof is is furthermore reduced to great by a Plexiglass wind-deflector bearing the SLR that measures little than a hand and is inserted the two rollover bars. Thanks to the aerodynamics and the highly effective there is very little even at speeds in excess of 200

Racing-style interior with a new in comfort

The interior of the Mercedes-Benz SLR Roadster was designed to provide a of a puristic sports car feeling and luxury. Carefully chosen such as carbon fibre, and leather of the highest quality and dominate the passenger compartment of the underlining the unmistakable attributes of a Gran Turismo: outstanding comfort and uncompromising concentration on dynamic driving pleasure.

its luxurious and comfortable appointments, the SLR McLaren Roadster clearly that the designers defined its dimensions with the requirements for a sports car firmly in mind. The of the passenger compartment are subject to the high requirements of first-class dynamics, and are therefore compact, or tailor-made. Nonetheless there is a of spaciousness in the two-seater, due in part to the low position which also the centre of gravity in the interests of handling characteristics. To compensate, the of the carbon-fibre bucket seats are at 28 rather than 25 degrees the seat cushions to allow a seating position.

Replaceable cushions for individual adjustment

to their multi-layered, composite construction, the light-weight, one-piece of CFRP are roughly 25 percent than conventional car seats. seat cushions allow the contours to be adapted to the anatomy of the in five sizes, and to that of the in four sizes. The one-piece seat shell is linked to an seat adjustment mechanism at points, allowing the seats to be to suit personal requirements respect to fore-and-aft position (by 130 height (by 41 millimetres) and angle (up to 9.6

Two-tone colour scheme and new

The two-tone interior colour for which only the finest such as high-grade leather and pearl velour carpeting are always features a dark-coloured to prevent distracting reflections, e.g. the seats, centre panels and the tunnel lining are in a colour depending on the chosen The rollover bars are lined in leather.

A particularly exclusive was specially developed for the Roadster, braided leather. This can be for the centre panels of the seats on and not only provides a high of climatic comfort but also complements and enhances the sophisticated technology used throughout the

Cockpit with a high-quality look

Once the electronic key is inserted, the SLR awakens into A starter button in the boss of the metal shift lever to glow red. Thumbing the covering mesh and pressing the starter button brings the power of the supercharged AMG V8 engine to The cockpit is intentionally minimalist in in line with motor philosophy. Easily legible on a dark background which specially styled for the SLR characterise the elegant chronometer design of the immediately signifying outstanding

Multifunction steering wheel paddles for rapid gear

The three-spoke steering wheel a diameter of 382 millimetres is adjustable for by 60 millimetres and for height by 2.7 degrees. shift paddles larger those in the Coupé are mounted on the of the steering wheel spokes. enable the driver to change without taking his hands the wheel in true Formula 1

In addition to the switches for the airbrake and programme, the roof operating is recessed into the centre of high-grade aluminium. The centre also accommodates the radio navigation system and the air conditioning

Automatic climate control sensors for sunshine, air quality and

Despite its puristic motor character, the Mercedes-Benz SLR McLaren is equipped with an automatic control system which no wish unanswered with to efficiency, practicality and ease of The Audio 30 APS unit combines a CD-player and controls for the CD changer and system with dynamic guidance in a single, clearly out unit. Perfect audio is ensured by the Bose sound which is specially configured for the conditions in the open-top SLR Roadster. Its electronics not only compensate frequencies, but also use a microphone to register road noise and the sound volume without by the driver.

Other integrated include a fixed mobile installation and all the aerials required for and telephone reception, as well as of the satellite navigation system.

standard appointments

Adaptive

Aero-wipers

Airbrake integrated the boot lid

AMG Speedshift R five-speed transmission with three shift programmes

AMG sports system with twin on each side

Aerial for car

Anti-lock braking system

Acceleration Skid Control

Audio 30 APS (navigation system integral radio and CD player), CD and GSM telephone

Outside temperature

Courtesy lights in the doors

tyre pressure monitoring

headlamps

Carpets with SLR

Brake Assist (BAS)

carbon-fibre bucket seats, adjustable, driver’s seat in different sizes with seat pads

CFRP structures at the front end and rear

integrated into the rear

Double wishbone suspension

alarm system

Electronic Programme (ESP®)

Electrically steering column

Electrohydraulic

Headlamp Assist

Power

Front airbags with gas generators

AMG Speedshift five-speed transmission with three and choice of manual shift

Belt tensioners and belt limiters

Head/thorax sidebags in the

Heated glass rear

Interior lighting with design

Ceramic brake

Automatic child seat

Knee airbags

Supercharged 5.5 l V8

Choice of 13 paint finishes

upholstery and leather interior

adjustable steering column

LED lights

Monocoque and carbon-fibre

Engine with four catalytic converters for exhaust below the EU 4 limits

Multifunction steering wheel with aluminium shift paddles

system with dynamic guidance

Fog lamps

18-inch in a ten-spoke design

Rain wipers

pressure monitoring system

computer

Heated windscreen system

Headlamp cleaning

ELCODE locking system

sound system

Sports seats of carbon-fibre with leather seat covers in 5 (4) sizes for the driver (passenger)

semi-automatic fabric soft-top, in three colours — anthracite, black red, — beige

Cruise with Speedtronic

Touch

Tirefit tyre sealing kit electric pump

Fixed bars behind the seats

interval display

Central in the instrument cluster

Central with remote control

automatic climate control

extras (selection)

19-inch in a turbine design

Brake painted in gold or red

Black inserts in the interior

Silver leather in 13 colours with SLR logo

Braided Composition

Contrasting seams in 300 SL red, grey or black

Two-tone wheel (matching second colour)

Floor mats leather piping in the second colour

Provision for mobile with universal interface

and safety

Many things impossible until someone otherwise. The new Mercedes-Benz SLR McLaren rebuts a long-standing prejudice, by that an open-top high-performance car can be every bit as torsionally stiff as a coupé. The proof of this is handling characteristics and undiluted driving pleasure to way beyond the mark, paired with comfort on long journeys and practicality for day-to-day driving, together makes the new Roadster an super sports car with a

Underpinning all of this is the systematic and use of high-tech materials for the body and technology. As in the Coupé, the bodyshell of the Roadster, including the front-end and structure, the passenger cell, the doors and the bonnet, is made from carbon-fibre reinforced This lightweight yet extremely material originated in the aerospace and has also proven its benefits in Formula 1 racing cars. to steel, the high-tech material a weight saving of around 50 per

Scientists at DaimlerChrysler Research an instrumental role in the development and to series production of carbon-fibre in the aviation industry, where are used predominantly for fins, and landing flaps. Quite from this, the experts at and McLaren have gained experience with this material, as well as acquiring expertise in its processing, from work on racing cars. invaluable know-how has also put to good use in the new Mercedes-Benz SLR McLaren whose entire body the benefits of carbon-fibre reinforced (technical abbreviation: CFRP). the two engine mounts are made aluminium. Even in super car circles, such extensive use of expensive, high-tech material is something of an exception.

Carbon-fibre for low weight and high torsional

Mercedes-Benz and McLaren opted for the use of CFRP because of the evident effects carbon fibres on rigidity and energy absorption. more, components made this material weigh up to 50 per less than comparable components offering the same and as much as 30 per cent less aluminium components. This CFRP the material of choice for high-performance cars, because weight not only means fuel consumption but also transfer of power to the road. to the consistent use of carbon-fibre-reinforced plastics, the structure of the Mercedes-Benz SLR McLaren is indeed considerably lighter the conventional steel construction of a front-mid-engined vehicle.

Intelligent in carbon technology

Compared to the SLR McLaren, which marked the ever use of carbon-fibre technology to a large extent in series car the way in which the material is applied has further advancement for the Roadster. By the arrangement of the different layers of matting, the engineers were to minimise the unavoidable weight produced by the Roadster’s roof any loss of strength. This the high-performance Roadster to retain an high, coupé-like level of stiffness that is unprecedented for a but without any significant increase in despite the mechanism for the soft

The roof’s design meant were other components in the that the design engineers unable to transfer directly the A-pillars with their steel reinforcements, as well as the frame, the rear wings, the lid and the swing-wing doors have all redesigned, although they to be made from carbon-fibre-reinforced of course. In contrast to the Coupé, the swing-wing doors inspired by the SLR racing car from 1955 or the Uhlenhaut Coupé as it is affectionately — have a frameless on the new Roadster so as not to lose any of that driving sensation. As in the Coupé, the are attached to the front roof and swing forwards and upwards an angle of 107 degrees when open. This door makes for a sensational appearance.

produces high energy values

Apart from extreme stiffness, the state-of-the-art materials are also renowned for excellent energy absorption. The capacity is around four to times higher than of metallic materials. Formula 1 have been exploiting quality for several years, the crash structure of their cars from CFRP. It is as a result of this that the of injury in high-speed accidents in Blue Riband motorsport has dropped significantly.

The monocoque or, to put it way, the passenger cell of the new SLR McLaren Roadster is also entirely from this material. In the event of a head-on, or rear-end collision, it offers the a highly rigid and hence survival space.

The new A-pillar, its additional internal reinforcement in the of a high-strength steel tube, has a role to play here. The of the Mercedes-Benz SLR McLaren Roadster marks the series-production debut of a complex steel/carbon-fibre compound combines high strength the elasticity required for safety Fixed rollover bars the seats complement the safety They ensure the occupants are an outstanding level of protection if the vehicle should turn

Carbon-fibre crash elements in the structure

At the rear, two internal members made from carbon fibre and a robust member assume the task of absorption in the event of a crash. In an from the side, the occupants are by the broad, low-set sills multi-shell deformable elements from specially reinforced materials as well as two aluminium incorporated into each The sturdy shell of the SLR seats has a protective function in a rear-end or collision and is likewise built highly resilient carbon-fibre

It is in the front-end structure of the SLR bodyshell the impressive safety properties of the fibre composite are particularly Here, two conical carbon-fibre-reinforced elements — each 620 millimetres in length, weighing 3.4 kilograms and consisting of an encased web — are enough to absorb the impact energy in a defined collision without exceeding the deceleration threshold for the occupants. The composite members are bolted the aluminium structure of the engine behind them. This that the Roadster, just the Coupé, has a front crash manufactured entirely from fibre.

In a collision, the fibres of the elements shred from to rear, absorbing the energy of the with a constant rate of Thanks to this steady behaviour and the high-strength monocoque, the absorption of the CFRP side can be precisely calibrated. The engineers this, for example, by creating a changing cross-sectional area for the This fine tuning that the deceleration values not only in predictable energy behaviour but also in a weight because this design only as much material as is needed.

Restraint system with airbags, sidebags and kneebags

A restraint system comprising six belt tensioners and belt limiters completes the SLR Roadster’s safety concept, ensuring it meets all Mercedes standards in regard too.

In the event of a collision, the electronic control first triggers the high-performance tensioners, which can pull up to 15 of loose belt strap in fractions of a second, reducing the displacement of the occupants caused by the The Mercedes-Benz SLR McLaren Roadster is fitted with kneebags, together with the two-stage provide a large protective for the driver and passenger in a frontal complementing the effect of the seat and belt tensioners.

Upfront for rapid airbag deployment

The tensioners are also activated if a situation is detected, triggered by a sensor which reliably this type of accident and its data at lightning speed to the control unit for the restraint The sensor is located in the centre

A sophisticated system of sensors allows adaptive control of the airbags, which deploy to the severity of the accident. If the sensors a light head-on collision, each trigger just one of the two-stage gas generators so that the driver airbag and 125-litre airbag are deployed with a internal pressure. If the sensors an accident of a greater severity, the also trigger the second of the gas generators and the airbags inflate a higher pressure.

Two upfront on the radiator cross member an ancillary function for this deployment of the restraint systems. to their forward positioning in the structure, they detect the of the impact even earlier and precisely. The deployment algorithm both this signal and the from the central crash on the centre tunnel.

While the sink safely into the the belt force limiters the force exerted by the belt on the upper body, further the risk of minor chest and injuries.

Sidebags with protection for the head

Protection in the of an impact from the side is by the integral sidebags in the doors. cushion both the head and the torso, which is why they are to in specialist circles as head/thorax In a side-on collision, this developed sidebag rips a seam above the armrest and within milliseconds to form an shaped airbag, the upper of which extends higher that of conventional sidebags. The design reduces the risk of the hitting against the side or any object which may penetrate the interior.

The automatic child recognition system, developed by is also part of the SLR’s equipment. It deactivates the passenger if one of the special child seats the Mercedes -Benz accessories is installed on the passenger seat. child seats have a system which receives and to signals from two antennae in the upholstery. As a result of the exchange of the airbag electronics recognise a child seat is fitted and the airbag on the passenger side its deployment is not desirable in these The belt tensioner and sidebag activated, offering the young additional protection in the event of an

Engine and transmission

An abundance of and high-tech features from the of motorsport these are the defining of the V8 engine in the Mercedes-Benz SLR McLaren with its 5.5-litre displacement, a angle of 90 degrees, screw-type and a crankshaft supported by five Which all means that the V8 unit developed by Mercedes-AMG perfectly into the high-performance of the new open-top Gran Turismo.

Key data at a glance:

Cylinder V8

Cylinder angle 90o

Valves per 3

Displacement 5439 cc

Bore/… mm

Cylinder spacing 106 mm

Compression 9.0. 1

Output 460 kW/626 hp at

Max. torque 780 Nm at 3250-5000 rpm

weight 232 kg

Power/weight ratio 1.9

From a mere 1500 the SLR powerplant delivers in excess of 600 of torque, rising to 700 metres at rpm. The maximum of 780 metres is from 3250 rpm and remains over a broad rev range up to rpm. The sublime torque is coupled to the agile responsiveness of a engine whose high-performance is never in any doubt: a peak of 460 kW/626 hp says it all. The SLR is endowed with what is one of the most powerful engines to be in a series-produced sports car, and class-beating performance figures as a

0100 km/h 3.8 s

0200 10.9 s

0300 km/h s

Top speed 332 km/h

Power screw-type supercharger

To ensure cylinder charging, the engine has a supercharger between the two banks of featuring two screw-shaped aluminium that are Teflon-coated to keep losses to a minimum. Its innovative allows a significantly higher pressure than conventional chargers because the two rotors can a top speed of around 23,000 per minute, forcing air into the system of the 5.5-litre powerplant at a overpressure of 0.9 bar. This that they compress 1850 kilograms of air into the combustion chambers every which is as much as 30 per cent than the figure achieved by charging systems.

In order to the greatest possible efficiency at all the AMG engineers created an intelligent management system which the operation of the screw-type supercharger to engine speed and load. the charger is only called action when it is really Nevertheless, the system ensures maximum power is available the it is summoned by a squeeze of the accelerator. prompts the electronics of the engine system to trigger an electromagnetic which immediately activates the which is driven by a separate Because the charger delivers its in fractions of a second, even the perceptive driver will not the non-supercharged phases. The charger air recirculation flap is opened partial throttle conditions to reduce fuel consumption.

Two with separate water

In addition to the supercharger, the electronics monitor all other variables to the engine including both the management for the pedal-sensitive drive and the implementation of spontaneous interventions by the or ESP®. The electronics also optimum control of the water for the intercooling system, as efficient is essential for maximising output. is because cold air is denser warm air and therefore contains more oxygen for combustion. In the SLR McLaren Roadster’s V8 engine, two intercoolers are responsible for this key one for each bank of cylinders. ensures that loss of is very low.

The engine-mounted operate on the highly efficient of an air-to-water heat exchanger: being compressed and hence by the supercharger, the air is cooled down via the own, separate water making the process independent of the temperature. This enables the V8 to its maximum output and torque at any time.

However, the tremendous of the eight-cylinder engine in the new SLR Roadster not demands effective cooling of the air, it also results in an increase in engine cooling The engineers made allowance for by incorporating generously proportioned air inlets and outlets as well as a 850-Watt suction fan.

Crankcase with dry-sump

The Mercedes-AMG GmbH engineers applied their extensive in the world of motorsport and in the design of engines to other details of the SLR The entire engine housing, for and the enclosed bottom section of the are cast in aluminium. Each is finely balanced and is supported by bearings made from a material for lasting transfer of the forces generated by the supercharged

The pistons are forged and are therefore manufactured in very small Like the forged lightweight rods, they are precision and weighed then allocated to the engines in such a way as to produce mass balancing tolerances. The slide in extremely durable, and friction-optimised barrels made a special compound which is only used in motor Dual oil injection ensures piston cooling.

The design of the oil cooling system also on the experience gathered at the race a sophisticated dry-sump lubrication with an oil capacity of around litres combines with a oil suction pump and a two-speed oil pump to maintain reliable under the full spectrum of conditions. An important secondary of the dry-sump lubrication technology, is usually only found in cars, is that it reduces the overall height, allowing it to be lower down and producing a low of gravity that favours handling.

In line with the practice at Mercedes-AMG, each SLR is manufactured by hand. In order to the very highest quality, the of ’One man, one engine’ is This means that powerplant is the responsibility of one AMG engineer, who out the entire engine assembly from installing the crankshaft in the block and assembling the camshafts and the right through to the cabling.

high-pressure pumps in the tanks

The high-performance engine draws its from two interconnected aluminium In order to keep the centre of as low as possible in the interests of exceptional dynamics, the tanks are installed low on the left and right in front of the axle. The tanks, which a total capacity of 97 litres (of twelve litres form the are equipped with two integral fuel pumps. These are by the engine management system and that the fuel supply the engine speed and load. again, a highly effective specific to the SLR was developed: one pump constantly while the second cuts in as required.

Four catalytic converters for efficient control

Secondary air injection and ignition give the engine the for low exhaust emissions. A sophisticated system complements these the cascade-design two-pipe system on both sides of a close-coupled catalytic converter plus, in the housing, a main catalytic with a special precious-metal The state-of-the-art metal design extremely thin walls, in a very low exhaust backpressure. to its cutting-edge engine management and control technology, the V8 engine in the new SLR the stringent EU4 emissions limits as as the current US limits.

On each of the vehicle, the catalytic converter opens into a rear which flows into two tailpipes with a diameter of 60 just behind the front These sidepipes a further of the 1950s SLR racers pave the way for a underbody, which is instrumental in the new Mercedes-Benz SLR McLaren Roadster its aerodynamic properties. The silencers are several times into calculated acoustic sections produce the Roadster’s distinctive, engine sound. The volume of silencer is 19.6 litres.

transmission program for shift worthy of a racing car

Likewise for high performance, the five-speed transmission was developed by Mercedes-Benz and has used successfully in several powerful models. It has been optimised for very high and also offers the driver the of choosing between different characteristics. The transmission transmits the power via a finely balanced and steel powertrain to the differential and the axle.

It includes the Speedshift that was developed by Mercedes-AMG for sporty motoring and also a wide range of functions in the new SLR Drivers can decide, for example, to leave the gearshift work to the transmission or to shift gears They are also able to the shift speed, which how sporty the gearshifts are. A switch in the centre console a choice of three program Manual, Comfort and Sport. The programme is indicated in the instrument display by the letters M, C or S.

Comfort and are automatic shift programs as the names indicate, place the either on comfort or on a more drive. In Manual mode, on the hand, the driver can select the gears either using the paddles on the steering wheel or the lever’s Tipfunction. When is selected, there is also the of choosing between three levels for fine-tuning a sporty style:

Level I = Sport

II = Supersport

Level III = Race

The the level, the shorter the shift and times inside the automatic and hence the shorter the gearshifts

Suspension

Highly advanced racing technology, high-performance systems and state-of-the-art materials a combination which helps the SLR McLaren Roadster to score top in three key handling criteria: active safety and comfort. In the the SLR suspension lives up to all the expectations a car driver might have of a Turismo bearing the Mercedes

The axle design is evidently the of experienced racing car developers, double wishbones assuming the of wheel location at the front and The lower links are arranged so the wheels have a negative when the springs compress and cornering at speed. This the best possible contact the road in any situation. At the same the axle technology prevents the of the car from diving when heavily and the rear from when accelerating.

As on the Coupé, was the material of choice for the new Mercedes-Benz SLR Roadster’s suspension. The wishbones are from forged aluminium, the wheel carriers are cast in In addition to a whole host of advantages over conventional designs, the lightweight nature of the allows the suspension to react faster and more sensitively.

The long wheelbase of 2700 also contributes to the SLR Roadster’s handling and is most evident in the exceptional directional stability. the large track width with the low centre of gravity high cornering speeds.

spring/damper units at the front and axle and an anti-roll bar at the front off the suspension concept. The anti-roll bar is above the front axle and is via rocker arms, as in a Formula 1 This means that it not take up any installation space could disrupt the smooth of the underbody a vital factor it comes to the sports car’s aerodynamic properties.

The speed-sensitive power steering also in with the intelligent lightweight In comparison with other systems, this design is by a significantly lower weight. to its low installed position in front of the and its ratio of 12.6, the steering responds directly to the driver’s and executes them with precision. The three-spoke steering has a diameter of 380 millimetres and is fitted an electric motor which it to be positioned to suit the individual It can be adjusted by 60 millimetres for reach, and its can be varied by 2.7 degrees.

Ceramic brake discs for performance

The exceptional properties of the brake system in the Mercedes-Benz SLR Roadster are complemented to perfection by the discs made from ceramic that can be found at the front and rear wheels. development is based on the one hand on the of DaimlerChrysler materials research on the other, on the experience with brakes that Mercedes-AMG has in touring car and GT racing. Here, yet again underlines its leading in the development of groundbreaking technologies for production.

In manufacturing the brake the carbon fibres, powdered and resin are pressed into at high pressure and autoclaved a silicon infiltration at temperatures of 1500 degrees Celsius to the ceramic. The benefits of this material are considerable: in addition to extremely sensitive response, the SLR McLaren Roadster’s brake are able to withstand temperatures of up to degrees Celsius which in tremendous fade resistance braking from high all while producing as much as hp of braking power.

Further of the revolutionary new brake material

the long life of the brake up to 300,000 kilometres

the low maintenance of the corrosion-free brake discs

up to 60 less weight than brake discs a further in terms of dynamic handling and comfort

even more braking the low thermal expansion of the discs means reduced judder under high Similarly, the cold judder from cast-iron brake also lessens significantly ceramic brakes.

Brake pad of 472 sq. cm at the front axle

The design of the was specially adapted to the fibre-reinforced brake discs. To this Mercedes-Benz developed eight-piston brake callipers which the front axle excellent power. Special channels, actively feed cooling air to the of the brake callipers, ensure cooling of the brakes.

In the Mercedes-Benz SLR Roadster there is a total pad area of 472 square centimetres at the axle alone an exemplary which, in combination with the robust high-tech material the discs are made from, a maximum rate of deceleration of up to 1.3 g.

rear spoiler — the

The outstanding performance of the SLR is also by the extending spoiler in the boot lid is referred to as the airbrake. If the driver heavily on the brake pedal, the spoiler rises to an angle of 65 to increase the contact pressure as a consequence, the braking forces can be exerted at the wheels. When from high speeds, it the SLR outstanding stability, while the increase in aerodynamic drag the braking effect even

Sporty handling dynamics with reassuring active

The electrohydraulic brake system in the SLR processes a raft of sensor describing the current driving and uses this to instantaneously and meter the optimum brake for each wheel. A high-pressure holds the brake fluid, flows into the system at a of 140 to 160 bar. This also the operation of the Electronic Stability (ESP®), which keeps the SLR on track by applying targeted pulses to the individual wheels reducing the engine torque. to even faster and even precisely metered brake from the high-pressure reservoir, can stabilise a swerving vehicle and at an early stage. It was therefore to permit a very sporty style with controlled angles in keeping with the of the high-performance car, but without active safety in any way.

On top of the electrohydraulic brake system a significant boost to active in critical situations too:

braking: the system interprets the sudden switch from the to the brake as an indication of an emergency and is able to react automatically. the aid of the high-pressure reservoir, the system the pressure in the brake lines and the brake pads into with the brake discs, so they can grip with force the moment the driver on the brake.

In the wet: brief, applications of the brakes wipe the film of water that on the brake discs so that the can always operate to full This automatic drying is activated whenever the windscreen have been operating for a length of time. The finely brake pulses are imperceptible to the

Braking on bends: thanks to brake force distribution, the system is able to exert an influence over the sports self-steering characteristics. Rather always applying the brake to the wheels on the inside and the outside of the in the same ratio, as with brake systems, distribution of the forces is adapted to the situation. The automatically increases the brake at the wheels on the outside of the bend due to the higher wheel contact these wheels are able to greater braking forces. At the time, the braking forces at the on the inside of the bend are reduced, the cornering forces which are so to directional stability. The result is stable braking behaviour and deceleration figures.

The electrohydraulic system also offers additional functions for even safety and comfort:

The Soft-Stop allows drivers to draw to a gentle stop, which be appreciated above all in city involving frequent stops at lights. This is made by finely metered pressure The Soft-Stop function is permanently a rapid build-up of stopping is only ever given by the system in response to emergency or brake applications, or when at manoeuvring speeds.

Start-Off prevents the car from unintentionally forwards or rolling backwards on and steep gradients. Brief but pressure on the brake pedal is all it to activate this function.

Assist can be activated using the control lever when the is at a standstill or when coasting at of up to 15 km/h. The advantage of this is that in stop-start traffic the only needs to use the accelerator; the accelerator is released, the system the SLR to a halt at a constant rate of Tailback Assist can remain up to a speed of 60 km/h. It is automatically at higher speeds.

18-inch as standard

Attractive 18-inch wheels are included in the standard for the Mercedes-Benz SLR McLaren Roadster. sporty, 10-spoke wheels are with tyres of different at the front and rear. 19-inch wheels, which emphasise the character of the Gran Turismo to stunning effect, are available as an extra.

W210 avantgarde stop
W210 avantgarde stop
W210 avantgarde stop
W210 avantgarde stop

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