This trio of CL-Class coupes may remind knowledgeable viewers classic two-door Mercedes-Benz models from the German company's heritage. They are sleek and sensuous. The hottest one is CL55 AMG, which equipped with a supercharged V-8 engine. CL500 gets smaller V-8, while CL600 benefits mighty V-12. closely related to automaker's S-Class sedans.