Mercedes-Benz has unveiled the facelifted C-Class at the Detroit auto show.The C-Class now features improved fuel-economy for the lineup, up to 31 percent, thanks to a stop/start system that is now standard on all variants. Mercedes-Benz is also promising most future C-Class automatics will come with the brand’s 7G-Tronic Plus transmission, also contributing to falling consumption and CO2 emissions for the range.The C-Class comes in two trim/equipment levels - Elegance and Avantgarde. 2012, auto preview, auto show, c-class, mercedes, mercedes c-class, naias, other motorsports, sedan, wagon, Motorsports