The 2012 Mercedes-Benz S-Class is a full-sized luxury sedan available in hybrid and AMG trim levels. The base S550 sedan comes standard with a 429 hp producing 4.6-liter twin-turbo V8 engine, 7-speed automatic transmission, and RWD. The S600 trim boasts a 510 hp producing 5.5-liter twin-turbo V12 engine, 5-speed automatic transmission, and RWD. For the green driver the RWD S400 hybrid trim offers a 295 hp producing mild-hybrid 3.5-liter V6 engine and the S350 BlueTec 4MATIC offers a 3.0-liter turbodisel V6 that produces 240 hp. The S63 and S65 AMG trim levels seamlessly combine luxury with performance. The S63 AMG sports a 5.5-liter bi-turbo V8 that produces 536 hp and 590 lb-ft of torque while the S65 harnesses the power of a 6.0-liter bi-turbo V12 that produces a whopping 621 hp and 738 lb-ft of torque. Both models are RWD and come with the AMG SPEEDSHIFT. Fuel mileage falls within an EPA estimated range of 12 mpg city to 31 mpg highway, depending on model selection. Safety comes in the form of 10-way airbag protection, blind-spot assist, anti-lock braking, electronic stability program, and active body control. The S-Class is backed by a 4-year/50,000-mile warranty.