The 2018 Mercedes-Benz AMG SLC 43 is available as a 2-door, 2-seat convertible. Starting at $61,350, the 2018 Mercedes-Benz AMG SLC 43 AMG SLC 43 is powered by a 3.0L , 6 - cylinder engine mated to an automatic transmission that returns an EPA estimated 20-mpg in the city and 29-mpg on the highway.