The 2008 Mercedes-Benz C-Class is available as a 4-door, 5-seat sedan. Starting at $31,600, the 2008 Mercedes-Benz C-Class Sport C 300 RWD is powered by a 3.0LL , 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 2008Mercedes-BenzC-ClassLuxury C 300 AWD , priced at $ 35,100 , is powered by a 3.0LL , 6 - cylinder engine mated to an automatic transmission that returns an EPA estimated 17-mpg in the city and 25-mpg on the highway.