The 2022 Mercedes-Benz AMG GLA 45 is available as a 4-door, 5-seat sport utility. Starting at $55,400, the 2022 Mercedes-Benz AMG GLA 45 AMG GLA 45 AWD is powered by a 2.0LL , 4 - cylinder engine mated to an automatic transmission that returns an EPA estimated 19-mpg in the city and 25-mpg on the highway.