The 2018 Mercedes-Benz AMG CLA 45 is available as a 4-door, 5-seat sedan. Starting at $50,400, the 2018 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 23-mpg in the city and 30-mpg on the highway.