The 2018 Mercedes-Benz AMG GLA 45 is available as a 4-door, 5-seat sport utility. Starting at $50,600, the 2018 Mercedes-Benz AMG GLA 45 AMG GLA 45 AWD is powered by a 2.0L, 4-cylinder engine mated to an automatic transmission that returns an EPA estimated 22-mpg in the city and 28-mpg on the highway.