The 2021 Mercedes-Benz AMG G 63 is available as a 4-door, 5-seat sport utility. Starting at $156,450, the 2021 Mercedes-Benz AMG G 63 AMG G 63 is powered by a 4.0LL , 8 - cylinder engine mated to an automatic transmission that returns an EPA estimated 13-mpg in the city and 16-mpg on the highway.