Mercedes has added hybrid technology to the C-Class range. The C350 Plug-In Hybrid, unveiled in Detroit, is powered by a four-cylinder petrol engine in conjunction with an electric motor, for a total system output of 279 bhp and 600 Nm of torque. With a 0-62 mph time of 5.9 seconds, Mercedes says the new C-Class Hybrid delivers sportscar-like performance, despite returning fuel consumption of 134mpg and CO2 emissions as low as 48 g/km. It can also cover a distance of 19 miles in emission-free, electric-only mode.