The 2020 Mercedes-Benz C-Class is available as a 4-door, 5-seat sedan. Starting at $53,950, the 2020 Mercedes-Benz C-Class C 300 RWD Cabriolet is powered by a 2.0L, 4-cylinder engine mated to an automatic transmission that returns an EPA estimated 21-mpg in the city and 29-mpg on the highway. The top of the line 2020 Mercedes-Benz C-Class C 300 AWD 4MATIC Coupe, priced at $47,950, is powered by a 2.0L, 4-cylinder engine mated to an automatic transmission that returns an EPA estimated 21-mpg in the city and 30-mpg on the highway.