The CL-Class is the coupé derivative of the S-Class full-size luxury saloon, upon which it shares the same platform. Formerly known as the SEC(Sonderklasse-Einspritzmotor-Coupé) and later S-Coupé, it was spun off into its own, separate name in 1996 and in 1997 for North American markets. The CL continued to follow the same development cycle as the S, though riding on a shorter wheelbase and sharing the same engines albeit with less choice as only the higher-output powertrains are offered. The last generation of the CL was actually heavier than its corresponding S trim (considering equivalent equipment), due to the roof engineering required to compensate for the lack of a central B-pillar.