Monday, September 10, 2012

Mercedes-Benz SLS AMG

The Mercedes-Benz SLS AMG is a luxury grand tourer automobile developed by Mercedes-AMG to replace the Mercedes-Benz SLR McLaren. The car is the first Mercedes automobile designed in-house by AMG and is described by Mercedes-Benz as a spiritual successor to the Mercedes-Benz 300SL Gullwing. The vehicle was unveiled at the 2009 IAA. Sales began in mid-2010 in Europe with MSRP of €177,310 (including taxes) and in the United States in mid-2011 for less than $200,000. 

Roger Fedrer Driving SLS AMG

Design

The SLS AMG was designed to be a modern 300SL Gullwing revival by Mark Fetherston in 2007. The car has a long bonnet, the passenger compartment is close to the rear axle and the rear of the car is short. The SLS AMG was developed from late 2006 in tandem with the Dodge Viper, with mules using Viper body panels over an aluminum chassis developed by Dodge SRT. The SLS AMG has also adapted the feature of wing doors that will swing open upwards on gas struts, not in a mix of upwards and forward like the SLR. The doors must be closed manually as AMG engineers decided against auto-closing systems because the systems would have added 90 pounds (41 kg) to the car. 

In case of a roll-over, the doors can be fully detached to allow the occupants to leave the vehicle. Although there is some overlapping in price and performance, the lighter SLS AMG is considered more of a sporty track-oriented car, compared to the Mercedes-Benz SL which is a more autobahn-focused grand tourer especially with its optional V12 engine. Compared to the SLS AMG Roadster, the SL is a hardtop convertible with technological and comfort amenities, and it also has available heated and cooled seats with a massage function.

Mercedes-Benz SLS AMGv Specification

Engine
  • M 159, liquid-cooled V8 Four-stroke engine, cylinder bank angle 90° Four valves/cylinder, 
  • DOHC Forged and balanced crankshaft 
  • Forged pistons 
  • Two 74 mm (2.91 in) throttles Bosch ME 9.7 ECU, electronic fuel injection 
  • Tubular steel exhaust headers 
  • Bore x stroke: 102.2 mm (4.02 in) × 94.6 mm (3.72 in) 
  • Displacement: 378.835 cu in (6.20799 L) 
  • Power: 571 PS (420 kW; 563 hp) at 6800 rpm 
  • Power per litre: 95 PS (70 kW; 94 hp) 
  • Torque: 650 N·m (480 lb·ft) at 4750 rpm 
  • Torque per litre: 104.7 N·m (77.2 lb·ft) Max. 7200 rpm 
  • Engine lubrication: dry sump Weight: 206 kg (450 lb) 
  • Each engine is built by one person in the AMG factory and has a plaque on the top of the engine signed by the builder.
Transmission

Standard transmission is AMG SPEEDSHIFT DCT 7-speed dual-clutch semi-automatic transmission through a lightweight carbon fiber driveshaft in a transaxle arrangement. Selectable driving modes include "C" (Controlled Efficiency), "S" (Sport), "S+" (Sport plus) or "M" (Manual). A true manual transmission is not available. 

Performance

The SLS AMG is capable of accelerating from 0 to 100 km/h (62 mph) in 3.8 seconds, and can reach an electronically limited top speed of 197 mph (317 km/h) (figures are provisional). In a Car and Driver test, the SLS recorded a quarter mile time of 11.7 seconds @ 125 mph (201 km/h).

Brakes

Standard brakes are 390 mm (15.35 in) (front) and 360 mm (14.17 in) (rear) cast iron disc brakes with 6-piston aluminium (front) and 4-piston (rear) calipers. Optional on the SLS AMG are carbon-ceramic disc brakes. 402 mm (15.83 in) discs with 6-piston aluminium calipers (front) and 360 mm (14.17 in) discs with 4-piston calipers (rear). These brakes provide increased stopping power with a 40% weight reduction compared to the standard brake system.

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