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Eight-cylinder supercharged engine developing 350 kW/476 hp


germany

350 kW/476 PS starkes Kompressortriebwerk mit acht Zylindern

The new SL 55 AMG: most powerful of all Mercedes-Benz passenger cars

  • 700 Newton metres of torque from a mere 2650 rpm
  • Five-speed automatic transmission with racing car-style gearshift on the steering wheel
  • Body attachments featuring dynamic AMG styling

the new sl 55 amg, photo by daimlerchrysler 12/01Seville - DaimlerChrysler will be exhibiting the new SL 55 AMG, currently the most powerful of all Mercedes passenger cars. Beneath the bonnet of the exclusive top-of-the-range Roadster lies a newly developed supercharged engine with eight cylinders, developing 350 kW/476 hp. The powerplant provides its maximum torque of 700 Newton metres from just 2650 rpm – a new record for V8 sports cars. The SL 55 AMG accelerates from 0 to 100 km/h in just 4.7 seconds. The impressive power development in the eight-cylinder engine is largely down to a newly developed belt-driven supercharger that generates about 30 percent more charge pressure than other comparable belt-driven supercharging systems. Rotating at over 25,000 rpm, the compressor's aluminium rotors press some 1600 kilograms of air per hour into the combustion chambers. The screw-type compressor is connected to the crankshaft by means of an electromagnetic clutch and a separate poly-V-belt, thus enabling it to spontaneously react when the driver presses the accelerator and provide powerful thrust at engine speeds barely above idling speed. Further special technical features in the V8 supercharged engine include the fuel system which, for the first time in a Mercedes-Benz, is controlled by a computer. This ensures that the right amount of fuel is delivered every time, depending on the engine speed and load. A sophisticated exhaust system with ceramic firewall catalytic converters and two powerful metal catalytic converters on the underbody reduces the high-performance sports car's emissions to a level which meets the EU-4 requirements due to come into force in 2005.

High-tech systems for enhanced safety and a dynamic driving experience

the new sl 55 amg, photo by daimlerchrysler 12/01Like the SL 500, the new SL 55 AMG has a unique package of cutting-edge dynamic handling control systems, unrivalled by any other series-produced car in the world. It consists of the new electrohydraulic brake system, Sensotronic Brake Control (SBC), the Active Body Control system (ABC) and Electronic Stability Control, ESP®. The optimum interaction of these systems ensures that the SL 55 AMG offers a very high degree of driving safety and dynamic handling. Among the most important performance features of the new Sensotronic Brake Control system are the extremely high dynamism when building up brake pressure and the precise monitoring of driver and vehicle behaviour using sophisticated sensors. In emergency situations, SBC instantly increases the pressure in the brake lines and applies the pads to the brake discs, so that they can grip instantly with full force when the brake pedal is pressed. Furthermore, thanks to variable brake force distribution, SBC offers enhanced safety when braking through corners too. The Mercedes-AMG engineers have adapted the axles, wheels, tyres and the entire powertrain of the SL 55 AMG to the high engine output. Internally ventilated and perforated brake discs on both axles ensure safe braking. The front pad face measures 220 square centimetres, making it almost twice as large as it is in the SL 500.

Gear changes at the push of a button on the steering wheel

the new sl 55 amg, photo by daimlerchrysler 12/01Furthermore, the high-performance sports car also comes with a 5-speed automatic transmission which sporty drivers may choose to operate using the Formula-1-style gearshift with two selector switches located behind the top two steering wheel spokes. To enable the system, the driver must first the activate "manual" mode. Further high-tech innovations which come as standard with the new SL 55 AMG include the vario-roof, which transforms the Roadster into a watertight Coupé in 16 seconds, the state-of-the-art lightweight body with its aluminium add-on parts and exemplary aerodynamics, the sensor-controlled automatic climate control system and adaptive drive dynamics which automatically adapt to the driver's personal driving style. A new type of head/thorax bag in the doors, two-stage airbags for driver and passenger, newly developed integral seats and the automatic, sensor-controlled roll-over bars make up the standard comprehensive occupant protection package on board the high-performance Roadster.

Bumpers, side skirts and wheels with sporty AMG bodystyling

the news sl 55 amg, photo by daimlerchrysler 12/01Visually, features which distinguish the SL 55 AMG from the SL 500 include bumpers with dynamic AMG bodystyling, distinctive side skirts, 18-inch multi-spoke wheels and four chromed tailpipes. Inside the power Roadster, high-quality aluminium trim with a sand-cast effect, AMG sports seats for perfect lateral support and cockpit instruments with silver-coloured symbol dials and red needles underline the exceptional character of this top-of-the-range sports car. The integral seats are trimmed in leather featuring an exclusive AMG perforation pattern and design. The powerful contours of the backrest side cushions distinguish them from their counterparts in the SL 500 and mean the seats can offer even better lateral support when cornering at speed.



amg

Mercedes-Benz SL 55 AMG

Engine
Number of cylinders/
arrangement
8/V, 3 valves per cylinder
Displacement cc 5439
Bore x Stroke mm 97.0 x 92.0
Rated power kW/hp 350/476 at 6100 rpm
Rated torque Nm 700 at 2650-4500 rpm
Compression ratio 9.0 :1
Mixture formation HFM microprocessor-controlled injection system

Transmission
Transmission type 5-speed automatic with manual transmission mode and steering wheel shift
Transmission ratios Final drive 2.82
1st gear 3.59
2nd gear 2.19
3rd gear 1.41
  4th gear 1.00
5th gear 0.83
Reverse 3.16

Chassis
Front axle Four-link suspension, Active Body Control
Rear axle Multi-link independent suspension, Active Body Control
Brakes Sensotronic Brake Control electro-hydraulic braking system - , 4 disc brakes, internally ventilated and perforated at front, internally ventilated and perforated at rear, ABS, Brake Assist, ESP®, pedal-operated parking brake
Steering Rack-and-pinion steering
Wheels   Front 8.5 J x 18 ET 30; rear 9.5 J x 18 ET 33
Tyres Front 255/40 R 18; rear 285/35 R 18

Dimensions and weights
Wheelbase mm 2560
Track width front/rear mm 1569/1551
Overall - length mm 4535
Overall - width mm 1815
Overall - height mm 1295
Turning circle m 10.88
Boot capacity l 317 (with vario-roof open: 235)
Kerb weight (EC) kg 1955
Payload kg 245
Gross vehicle weight kg 2200
Roof load kg 50
Tank capacity/reserve l 80/11

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DaimlerChrysler Communications, December 10, 2001

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