The 2018 Mercedes-Benz AMG GT is available as a 2-door, 2-seat coupe. Starting at $112,400, the 2018 Mercedes-Benz AMG GT Base Coupe is powered by a 4.0L , 8 -cylinder engine mated to an automatic transmission that returns an EPA estimated 16-mpg in the city and 22-mpg on the highway. The top of the line 2018Mercedes-BenzAMG GTC Coupe , priced at $ 145,000 , is powered by a 4.0L , 8 - cylinder engine mated to an automatic transmission that returns an EPA estimated 15-mpg in the city and 20-mpg on the highway.