The 2019 Mercedes-Benz AMG SL 63 is available as a 2-door, 2-seat convertible. Starting at $154,450, the 2019 Mercedes-Benz AMG SL 63 AMG SL 63 is powered by a 5.5L, 8-cylinder engine mated to an automatic transmission that returns an EPA estimated 15-mpg in the city and 23-mpg on the highway.