The 2010 Mercedes-Benz C-Class is available as a 4-door, 5-seat sedan. Starting at $33,600, the 2010 Mercedes-Benz C-Class Sport C 300 RWD Sedan is powered by a 3.0L , 6 -cylinder engine mated to a manual transmission that returns an EPA estimated 18-mpg in the city and 26-mpg on the highway. The top of the line 2010Mercedes-BenzC-ClassLuxury C 300 AWD 4MATIC Sedan , priced at $ 37,300 , is powered by a 3.0L , 6 - cylinder engine mated to an automatic transmission that returns an EPA estimated 18-mpg in the city and 25-mpg on the highway.