It doesn���t take an auto historian to rationalize that Mercedes-Benz has not only created some of the greatest vehicles on the road but also the specific categorical segments they fall under. Automotive Rhythms was on-hand when the Vision CLS concept debuted at the Frankfurt Auto Show in 2003. Ostensibly it was to become the industry���s first four-door sports coupe. But a coupe has two doors. How would it succeed? By artvlive Tags : 2012 , 4-door , 7G-Tronic , Artv;artvlive; , Benz; , CLS-Class; , CLS550; , Day; , Geoff , Hubert , Kimatni , Lee; , Mercedes-Benz , Mercedes-Benz; , Mercedes; , Plus; , Rawlins; , automotive , cl263amg; , cls63; , comman , coupe; , coupes; , kimatni; , rhythms; , sedans; , sports