In 2011, the Mercedes C-Class was given a subtle, yet comprehensive overhaul. The sharper grille and bumpers help it stand out, while inside the dashboard has been totally redesigned using quality materials, a modern layout and a slick integrated media screen. There are three variants, a saloon, Estate and Coupe, with the four-door executive making up the majority of sales. With a range of efficient petrol and diesel engines, plus standard equipment like stop-start, the Mercedes C-Class is one of the most efficient premium cars on the market. The most environmentally friendly version is actually the punchy twin-turbo C220 CDI diesel, which can return 68.9mpg and only 109g/km of CO2.