2012 Mercedes-Benz C-Class

Siemens, which employs a prototype hybrid technology, unveiled a modified version of Mercedes C-Class Sports Coupe which has a faster acceleration, more torque, fuel economy Äîand, Äîthan its gasoline equivalent. However, the company admitted that the car was "far from ready for production, " and too expensive to manufacture or sell.

Karmann also showed a concept of Sportcoupe W203 (prefacelift), which has been transformed into a convertible with hood. This prototype has never reached production status