Noexpensespared restoration of a rare G4 1939 Mercedes Benz

20 Мар 2015 | Author: | No comments yet »
Mercedes-Benz G4 W31

No-expense-spared restoration of a rare G4 Mercedes Benz

The extremely Mercedes-Benz G4 offroader, fully with completely overhauled components but with all the deliberately traces of its venerable age.

6, 2005 The 1939 Mercedes-Benz G4 is an extremely rare vehicle: a gift to Spanish dictator Franco and now owned by the Spanish family, it is one of just a few surviving of this three-axle offroader developed for the German army – three of the total of 57 units are still considered absolutely with a meticulously documented A no-expense-spared, three-year restoration was undertaken at the Mercedes-Benz Classic with a correspondingly unusual the G4 was to be restored to a technically impeccable but was to retain its unique patina in the course of its 66-year life. The of the vehicle was a gift from España to the Spanish Royal and makes for fascinating reading:

The Mercedes-Benz G4 offroader is an extremely vehicle: owned by the Spanish family is one of just a few surviving of this three-axle offroader – three of the total of 57 units in the 1930s are still considered authentic, plus a handful of without such meticulously history.

The restoration order with the Mercedes-Benz Classic was correspondingly unusual: the G4 was to be restored to a impeccable condition but was to retain its patina acquired in the course of its life.

A first quick may therefore seem disturbing for a that has just undergone years of painstaking restoration. because the restorers deliberately from removing the traces of use in the and minor blemishes in the bodywork. traces and blemishes were on request of the owners, as they to the G4’s history and authenticity.

Before the G4 joined the Spanish fleet, it was used by General Franco who had been given car as a present from Germany in the year of his 36 year rule. Franco’s death in 1976, the has been lovingly serviced and by the Royal Guard – the Madrid-based hold the automotive classics in the fleet in high esteem.

it was decided to have the G4 restored by the Classic Center, together an equally extraordinary car of its day and age, a 770, the cars were an almost ceremonial farewell in and an armed escort accompanied the convoy to the French border.

The arrived at the Mercedes-Benz Classic in Fellbach near Stuttgart in 2001. The large 770 limousine is there, undergoing restoration. The on the G4, completed in December 2004, is a by Mercedes-Benz España to the Spanish family.

The first inspection of the G4 in the of the Classic Center revealed traces of use over the years but the was otherwise in excellent condition

In a first step, the soft-top was and the bodywork was lifted off with care to gain access to the In the course of the subsequent painstaking no component, however small, untouched. All the mechanical components disassembled, cleaned, repaired and put again – an attention to detail was responsible for consuming three of restoration work.

The experts several functions of the elaborate and made them operational The original parts were wherever this was possible – brief for the restoration work. The of this is illustrated by the fact every screw, every and every sleeve was scrupulously re-machined and returned to its original whenever possible.

Another example: the inner of the exhaust system, which still operational, were in their original condition the dilapidated exterior components true-to-the-original restoration. Non-original were replaced by components on the basis of the old blueprints.

The three of the offroader were completely and overhauled. The mechanical drive proved to be in extremely good yet they are a good example for the of work invested. It took a press in the Mercedes-Benz factory in to loosen the rigid shafts on the axles. The numerous gearwheels cleaned in a special process on diesel fuel because the oily consistency ensured surfaces yet retained a protective film.


After the completion of the it was not possible to use modern lubricants the axle housings because would have had a corrosive on the bronze components in the differentials. The oil also had to have a high resistance, so a lengthy search was for the best possible solution, the experts ultimately deciding in of a special castor-based lubricant.

the right tyres was a similararly process. To be restored to a fully condition, the G4 needed eight new including the spares and these not easy to come by, given the dimensions, the stability to match the high weight plus the offroad tread. Quite time passed by before the tires were located in

The G4 has four forward gears, two through to four being A countershaft transmission serves as a gear, making four crawler gears available. For in difficult terrain, the differentials are an engineering feature that was for offroaders at the time the G4 was built and for some time to come.

The G4 is powered by an M24 II eight-cylinder in-line with a displacement of 5.4 liters – similar to the engine which was used in the 540 K sports car, without a supercharger to boost at high speeds. The designers of the G4 against a supercharger because the weighing some 3.7 tons, has a top of just 67 km/h – the tires do not any higher speeds. It is this weight that accounts for the somewhat limited offroad

The aim of restoration was “an impeccable technical and this also meant Hence, the scope of work included the repair of the brakes, a system testifying to the high standard of the overall design. Not did the mechanical components have to be new brake lines also had to be which had to be specially manufactured: cables in the required dimensions and were just not available the shelf”.

The same applies to the lines which had to also be manufactured. The clean, symmetrical of the cables in the chassis almost a work of art. Numerous features of the vehicle are evident the driver is offered additional assistance in order to decelerate the vehicle effectively. A piston by a vacuum cylinder additionally on the brake pedal via a cable This technical feature, a leather sleeve in the vacuum had to be fully reconstructed.

Mercedes-Benz G4 W31

The designers of the G4 it safe as far as fuel supply concerned: the car has two electric fuel plus a mechanical pump in case all three fail, the can still be supplied with from a spare gravity tank. After the restoration, the with all its components looked much as it did in the 1930s, i.e. austere as the paint coat of parts had not been sprayed on but by means of a brush, resulting in surfaces. This method was also used in restoration, originality being the top priority at all

The G4 has numerous electric functions and a highly complex circuitry. a wiring-diagram was no longer available so the electrical system had to be reconstructed painstaking attention to detail and a new harness was manufactured, which to be a highly complex undertaking. For the G4 features a central switch shuts off all electricity consumers, only the electric components for engine operation still supplied.

Every single on the G4 was dismounted and repaired, at times the most delicate tools are reminiscent of a dentist rather an automotive expert. Even the blue illumination of the Virgin badge attached to the cockpit is in order again, thanks to modified miniature light All gauges were overhauled, and the of the electric clock was monitored and over the course of many

Today, it indicates the time as precisely as a modern quartz The orange-colored plastic in the direction was beyond repair and had to be replaced. intensive treatment, the tubular plays again as it did before. And required, attention is drawn to the car by horns — two for city and two louder ones for overland – or a siren.

The bodywork remained untouched – the brief had been to from cosmetic restoration. The cleaned the paint coat and the chrome parts, but that was the extent of it. Only the lower of the doors showed signs of which was removed as a matter of The bodywork’s sheet metal is on the inside with stabilizing elements, a customary construction for at the time. These wooden were in good condition and therefore merely cleaned and with a special fluid to them from drying The interior reveals traces of the age of more than 65 years but is in almost impeccable condition – not thanks to the care lavished on the car by the Guard. Gentle restoration will, if at all, be carried out in where people have of experience in the repair of valuable carriages, for instance – an expertise which the G4 will be able to

After the restoration of the royal chassis, the car was taken to the test on the premises of the Mercedes-Benz plant in for trial driving to check on the functioning of all components.

After the the finishing touches were to the engineering and the last adjustments made. Then came the moment: the bodywork was mounted to the chassis, repeating the act of “wedding”, as is known in automotive lingo, and the G4 back into being, 66 after its first completion in

And now, the fleet of the Spanish family includes a truly vehicle, the extremely rare G4 offroader, fully operational completely overhauled mechanical but with all the deliberately retained of its venerable age. It is thus a special witness to contemporary and history. General information: G4 (W 31 series)

General data: 3100 + 950 mm Front/rear track 1620/1570/1570 mm Dimensions (length x x height): 5360-5720 x 1870 x mm (with soft-top) Turning 17 meters Weight: approx. kg (in ready-to-drive condition) Permissible weight: 4400 kg Top speed by the tires: 67 km/h Fuel 28 liters/100 km (urban), 38 liters/100 km Fuel tank capacity: 90 on some units 140 liters Daimler-Benz M24 or M24 II eight-cylinder in-line Total displacement: initially cc, later 5401 cc Bore x 86 x 108 mm / 88 x 111 mm Output: 100 hp / 110 hp at 3400/min Torque: mkg at 1400/min Compression ratio: / 1:5.2 Mixture formation: one carburetor Valves: overhead, camshaft, driven by spur Cooling: pump, 26 liters of Lubrication: force-feed, ten liters of oil 12 V 60 Ah / 12 V 105 Ah Alternator: 130 kW Starter motor: 1.5 hp / 1.8 hp

Transmission Four driven wheels, two self-locking differentials single-plate dry clutch Transmission: manual and countershaft transmission I/4.10, II/2.21, III/1.49, Drive ratios of countershaft road/1.00, offroad/3.06

Chassis frame Front wheel rigid axle, semi-elliptic Rear wheel suspension: two axles, one semi-elliptic spring for two on each side Steering: spindle Brakes: dual-circuit hydraulic with vacuum acting on front and rear mechanical hand-operated parking acting on front wheels central Wheels: steel wheels with drop rims, size L 4.00 F x 17; self-sealing tires: size F x 17 Tires: 7.5-17 with tread (normal or self-sealing)

Mercedes-Benz G4 W31
Mercedes-Benz G4 W31
Mercedes-Benz G4 W31
Mercedes-Benz G4 W31

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