The 2009 Mercedes-Benz C-Class is available as a 4-door, 5-seat sedan. Starting at $36,450, the 2009 Mercedes-Benz C-Class Luxury C 300 AWD 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. The top of the line 2009Mercedes-BenzC-ClassC 63 AMG RWD , priced at $ 56,300 , is powered by a 6.3LL , 8 - cylinder engine mated to an automatic transmission that returns an EPA estimated 12-mpg in the city and 19-mpg on the highway.