The 2017 Mercedes-Benz AMG C 63 is available as a 4-door, 5-seat sedan. Starting at $65,200, the 2017 Mercedes-Benz AMG C 63 Base AMG C 63 RWD Sedan is powered by a 4.0L , 8 -cylinder engine mated to an automatic transmission that returns an EPA estimated 18-mpg in the city and 25-mpg on the highway. The top of the line 2017Mercedes-BenzAMG C 63S AMG C 63 RWD Cabriolet , priced at $ 80,850 , is powered by a 4.0L , 8 - cylinder engine mated to an automatic transmission that returns an EPA estimated 17-mpg in the city and 22-mpg on the highway.