The 2021 Mercedes-Benz AMG S 63 is available as a 2-door, 4-seat coupe. Starting at $173,100, the 2021 Mercedes-Benz AMG S 63 AMG S 63 AWD 4MATIC+ Coupe is powered by a 4.0LL , 8 -cylinder engine mated to an automatic transmission that returns an EPA estimated 16-mpg in the city and 26-mpg on the highway. The top of the line 2021Mercedes-BenzAMG S 63AMG S 63 AWD 4MATIC+ Cabriolet , priced at $ 185,400 , is powered by a 4.0LL , 8 - cylinder engine mated to an automatic transmission that returns an EPA estimated 14-mpg in the city and 24-mpg on the highway.