The 2020 Mercedes-Benz AMG CLA 45 is available as a 4-door, 5-seat sedan. Starting at $54,800, the 2020 Mercedes-Benz AMG CLA 45 AMG CLA 45 Coupe AWD 4MATIC is powered by a 2.0L , 4 - cylinder engine mated to an automatic transmission that returns an EPA estimated 20-mpg in the city and 29-mpg on the highway.