The 2021 Mercedes-Benz AMG CLA 45 is available as a 4-door, 5-seat sedan. Starting at $55,350, the 2021 Mercedes-Benz AMG CLA 45 AMG CLA 45 Coupe AWD 4MATIC is powered by a 2.0LL , 4 - cylinder engine mated to an automatic transmission that returns an EPA estimated 20-mpg in the city and 29-mpg on the highway.