Few sports cars can boast a continuous 50-year history like the Mercedes-Benz SL can. The high-performance SL55 AMG ($128,800 new) features a supercharged 5.5-liter V8 and special tuning by AMG. The SL55 AMG , in addition to its special front, rear, side, and interior trims, sport seats, and AMG alloy wheels, has a new dashboard information display, for 2007, that includes for the first time a RaceTimer feature that will track lap times, lap length, average speed, and top speed. This SL55 AMG gets an electric trunk closer, aluminum steering-wheel-mounted shift levers and a complete carbon fiber interior.