Coupe or convertible? Get ‘em both with the Mercedes-Benz SL-Class, a sexy hardtop roadster that benefits from a few styling updates and power upgrades. All models get tweaked front bumpers, revised taillights, and new wheels. The Europe-only SL350 now offers 272 horsepower from its V6, good for 0-62 mph in 6.6 seconds. Models bound for American shores are the V8-equipped SL550, which ponies up 388 horsepower for a 0-62 mph time of 5.4 seconds, and the SL600, with its 517-horsepower bi-turbo V12 that reaches 62 mph in only 4.5 seconds.