Mercedes-Benz is calling this CLS a "coupe" is more of a mid-sized sedan masquerading as a sleeker smaller looking vehicle. Since its inception its chassis remains based on the same platform as the E-class and with the intention of delivering coupe-like styling but with four doors. Operating on a 48-volt electrical system allows unique features such as seamless start/stop functionality and electric ancillary engine components that draw less on the engine making for better gas mileage and power output. This places it in stiff competition with other sedans from familiar manufacturer rivals such as the A7 from Audi, the BMW 6 series, and the brilliant, but wildly expensive, Porsche Panamera.