The SL65AMG is powered by a 604 hp twin-turbo V-12 mated to a five-speed automatic transmission with SpeedShift. Each engine is tuned by a special AMG tuner and signed by the specialist. Traction control, limited-slip differential, electronic stability control, electronic brake distribution and brake assist all come standard. Passive safety features include frontal and side-impact head-and-thorax airbags as well as knee airbags. A rollover protection bar automatically snaps up if its controlling computer senses that the car is tipping over.The Mercedes-Benz SL-Class is a carryover from 2005.