2012 Mercedes-Benz SL 500 (R231) is a luxury grand tourer powered by a 4.7-liter twin-turbocharged V8 engine (M278). Highlights include the following: 19-inch AMG five-spoke alloy wheels; AMG bodystyling; Panoramic glass vario-roof operable via infrared car key; Sports suspension; Torque Vectoring Brakes; a flat-bottomed AMG Performance four-spoke multi-function nappa leather steering wheel with alloy gear shift paddles; Chequered flag-design instrument cluster; Sports seats with perforated leather upholstery; Intelligent Light System; Adaptive Damping System with Sport and Comfort modes; Magic Vision Control adaptive windscreen wiper system; COMAND Online, and Parameter speed-sensitive power steering. Key Specifications Engine: 4.7-litre (4,663 cc) twin-turbo V8 petrol Power: 429 bhp (320 kW) @ 5,250 rpm (some sources list 435 hp) Torque: 516 lb-ft (700 Nm) @ 1,800-3,500 rpm Transmission: 7-speed automatic (7G-Tronic) with rear-wheel drive 0-62 mph (0-100 km/h): 4.6 seconds Top Speed: 155 mph (electronically limited) Fuel Economy: ~31.0 mpg combined (approx. 9.1-9.6 l/100km) CO2 Emissions: 212 g/km Notable Features Suspension: Semi-active adjustable damping Interior & Comfort: COMAND navigation, Airscarf neck-level heating, multi-contour electric memory seats, and Frontbass audio. Safety Systems: PRE-SAFE, Attention Assist, active bonnet, and a 5-star safety layout. Construction & Design Body: All-aluminum bodyshell with magnesium and high-strength steel components. Weight Reduction: Sheds roughly 125 kg compared to the previous generation, bringing the kerb weight down to 1,785 kg. Roof: Retractable hardtop (Vario-Roof) available with optional glass