The SL-Class represents the best of the hardtop convertible category. It is perfectly balanced and its engine selection comprehensive. It comes equipped with a V8 or a V12 for the SL550 and SL600 versions, while the AMG versions are powered by a 6.2-litre V8 and a twin turbo V12. The extra sporty SLR comes with a 618 horsepower V8 The SLS AMG Gullwing, a tribute to the 300SL from the 50s, has just been unveiled.