Technology and Power the R129 Series

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Mercedes-Benz SL 320 224hp R129

Technology and Power: the R129

July 5th, 2010

Heart flutter or fascination at its

R129 series SL was introduced in in 1989 and debuted in North as a 1990 model. The new 4-cam V-8 322hp. Here is a Euro car in Silver (702) with interior.

The SL legend was continued in in 1989 with a launch a thunderbolt when Mercedes-Benz a new dream of a car to the world, with world firsts on board: 300 SL, 300 SL-24 and 500 SL.

No rollover bar marred the lines of the open roadster – but it was raised either at the push of a or automatically in an accident – a standard just like the lightweight hardtop weighing just 34 The car’s advanced engineering also included all-new, integral seats with magnesium frame and integrated belts, a fully automatic and a draught-stop for open-top motoring in all The trunk offered sufficient for the luggage of two people.

A Long

Development of the R 129 took a long due to the scrupulous attention given to individual detail feature. Its officially began in the early and so it had “time to mature” as one of its creator put it. The designers and engineers invested a lot of in the fine-tuning of the car’s features, succeeding in not just satisfying but by far the high expectations of customers and parties all over the world.

In the of the decades, the SL face had conquered a place in the Mercedes-Benz model The new SL demonstrated a stylistically new interpretation of the radiator grill: within the mask organically integrated in the hood, the Mercedes star was by horizontal louvers made of aluminum.

The stylish and smooth lines of the wedge-shaped bodywork, the flared for the wide tires, the half-spoilers in of the front wheels, the steeply windshield, the well-sculpted rear end and the light-alloy wheels combined a vibrant beauty which not only the friends of the brand.

fine-tuning extending to the underfloor and the air through the engine compartment in a fuel-saving and speed-boosting Cd value of for the car with the hardtop fitted – a value for a roadster, rising to with the soft-top down.

resistant lower side contrasted main body and was not always harmonious, particularly on red

A Car Design Award

Less a year after its launch, the SL the much-coveted international Car Design presented by a jury of eleven from ten countries plus of the city of Turin and the Piedmont The jury explained its decision as

‘In the Mercedes-Benz 300 – 500 SL, the combination of new safety …exemplary ergonomic solutions and a fully in keeping with the traditional culture is found to be convincing. The new SL thus embodies the valuable elements of contemporary design – without foregoing the every sports cabriolet have.’

The exemplary solutions among other things, the an ingenious combination of tubing and that prevented turbulence the windshield without interfering the ‘climate’ inside the passenger Leather jackets and caps therefore just as much a of the past as ladies getting Even high speeds no presented a draughty problem, and driving at low temperatures proved to be an road show. Today the draught-stop – in which its inventors four patents – is a matter-of-course of many cabriolets anywhere in the

Torsional Rigidity

The car also set new in the field of safety. A precondition for functioning of the fully automatic was the torsional rigidity of the bodywork – and it nothing to be desired in this either. It did not have to fear with the sedans and became the valid yardstick for open-top car throughout the industry.

The open-top car was to the demanding Mercedes-Benz front and impact tests – and the results sensational, verifying the development scrupulous work. Bodywork in a lateral crash by far exceeded the required level; this was to the integrated design of all detail for instance doors overlapping the cross-bracing under the seats rigid propeller shaft sides, or the high-strength steel inside the A-pillars, enhancing to a roof impact.

Another of the safety concept was the rollover which was automatically raised its virtually invisible rest in the event of a threatening rollover at speed. The potential of this feature and the entire safety was demonstrated in dramatic form the trial-driving launch for journalists. and passenger were a bit rattled their accident but otherwise

High-Stability Integral Seats

features in interior design the SL’s integral seats, an engineering masterpiece in their and forming a crucial element of the concept. The seat frame and were made of different, matched thin-wall magnesium castings. Three-point seat automatically height-adjusting head and the servomotors for longitudinal, height and adjustment of seat squab and were all fitted on or inside the Another important element was the locking of the backrest. The seat’s capacity in a crash amounted to times the maximum possible

The seat incorporated 20 patents for features; in appreciation of his pioneering its creator received the 1989 Pietsch Award which with a respectable prize

Fully Automatic Soft-Top

The automatically opening and closing was a small miracle in itself – not of the hydraulic soft-top operating but because of the complicated folding of the top the narrow soft-top compartment and the taut and smooth fit of the soft-top closed. It had to be – and was – resistant to the vacuum above the roof on the move, would otherwise have the soft-top upwards like a and the rollover bar had to – and did – work perfectly with the soft-top closed.

A New

One-touch power soft top was a vast improvement over the manual process for the previous SLs. This is a 1996

The suspension was equally all new. At the the wheels were located by a strut axle with springs, anti-dive control and wishbones, gas-pressure shock and an anti-roll bar. The car was also the SL with a modified multi-link rear suspension with and anti-lift control, coil gas-pressure shock absorbers and an bar.

Mercedes-Benz SL 320 224hp R129

Those wishing even sensitive springing response or greater tautness for dynamic were able to opt for the adaptive system, ADS, that the car’s level depending on the in the car, the road surface and the style – the system was the precursor of suspension.

The brakes convinced hard-baked test drivers who put the SL to the test on the Passo dello The car was decelerated by four-piston fixed-caliper brakes on the front axle and fixed-caliper disc brakes on the axle. The brake discs internally ventilated both and rear and ABS was as much fitted as a of course as a dual-circuit brake Brake Assist (BAS) was in 1996, the Electronic Stability (ESP) minimizing the risk of in 1999.

AMG ‘Sport’ package very popular in the late and featured wide wheel/tires, front and rear bumper The more deeply sculpted panels were also of the package. The package was purely in the US, however, as power remained the as a standard SL500.


The entry-level model into the new SL was the 300 SL with two-valve six-cylinder which developed 190 hp/140 kW; it was by the 300 SL-24 with four-valve 231 kW engine. These two power were replaced in 1993 by new engines with 2.8 and 32. liter dominating the field until with both their of 193 hp/142 kW and 231 hp/ 170 kW, respectively, and their running characteristics.

The next to were V6 engines with technology and dual ignition: a 2.8 with 204 hp/150 kW and a 3.2 liter 224 hp/165 kW. The flagship was initially the 500 SL four-valve V8 developed 326 hp/240 kW. the revision of model designations, the 500 SL was SL 500 in June 1993 – a designation applied to all Mercedes-Benz models.

In October 1992, the dream of SL friends came true at last the much longed-for was introduced – a six-liter V-engine four overhead camshafts, valves per cylinder, adjustable camshafts, microprocessor-controlled injection and catalytic converters.

With the SL 600 – SL 600 from June 1993 – acquired an output of 394 hp/290 kW and from standstill to 100 km/h in 6.1 Its “little” eight-cylinder brother 6.5 second and they both reached a top speed of 250 kilometers per – or would have reached more had their top speed not electronically limited.


Those demanding even performance and prestige from the and twelve-cylinder models were to turn to the brand’s sports Messrs. AMG in Affalterbach near in which DaimlerChrysler has held a 51 stake since January 1, when it was re-named Mercedes-AMG The branch offered customers an appetite for power several for instance, in the late nineties, the SL 55 AMG 5.5 liter V8 developed 354 hp/260 kW and the sprint from standstill to 100 in 5.9 seconds.

Europe only was based on the first generation of the cars. Unique AMG wheel and upgrades transformed the standard into a muscular if heavy

Top-of-the-pops was the SL 73 AMG, whose 7.3 V12 produced 525 hp/ 386 kW and catapulted the car to 100 km/h in 4.8 seconds. Without speed the car was capable of doing 300 kilometers per The powertrain of the AMG models was matched to the loads in all its components, from transmission to rear axle.

The AMG package, including fog lamps in the front bumper, emphasized the appeal of the roadster without with its clean lines. The 18″ light-alloy AMG wheels added an touch of unmistakable sportiness.

The offered silky smooth This is one of the rare Europe AMG SL73s. Note Panorama

At the time of the discontinuation of the R 129, the generation of production SL cars, 494,000 units of the exclusive cars from the SL-Class had off the assembly lines at the Mercedes-Benz car in Sindelfingen and Bremen. This figure includes just 205,000 units of the R 129, the SL generation to be produced in the Bremen It does not include the 26,000 of the 190 SL, this car being allocated to the segment of today’s SLK-Class.

Mercedes-Benz SL 320 224hp R129
Mercedes-Benz SL 320 224hp R129
Mercedes-Benz SL 320 224hp R129


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