An improvement of up to 31 per cent has been achieved in fuel consumption and all Mercedes-Benz C-Class launch models will feature the ECO start/stop function as standard. All the engine variants are now classed as BlueEFFICIENCY units, showing that they are particularly efficient and environmentally compatible in their use of fuel. In future all automatic versions will feature the further-developed 7G-TRONIC PLUS seven-speed automatic transmission. In addition, the overall ratio of all new powertrain variants has been optimised for better fuel economy.

All the petrol engines in the model series have direct injection. One of the highlights is the introduction of the new V6 petrol engine with its innovative and highly efficient BlueDIRECT process in the C 350 BlueEFFICIENCY. The quantum leap in efficiency is particularly well illustrated by the six-cylinder unit: Power has increased considerably, the C 350 BlueEFFICIENCY delivering 306 hp and 370 Nm (previously 292 hp and 365 Nm).

The four-cylinder petrol engines, which made a great evolutionary leap forward in 2009 and all feature direct injection and turbocharging and excel with high performance and exemplary economy.

The most economical model in the Mercedes C-Class range has also become even more frugal: the C 220 CDI BlueEFFICIENCY with the manual six-speed transmission and the standard ECO start/stop function. This corresponds to 117 grams of CO2 per kilometre. In conjunction with the improved 7G-TRONIC PLUS automatic transmission and the ECO start/stop function included as standard, the C 220 CDI BlueEFFICIENCY and C 250 CDI BlueEFFICIENCY both deliver top-class figures with a combined diesel consumption of 58.8 mpg. This corresponds to CO2 emissions of 125 grams per kilometre.