The 2015 Mercedes-Benz GL-Class is a 4-door, 7-seat Sport Utility, available in 4 trims, ranging from the GL550 to the GL350 BlueTEC. Upon introduction, the $89,950 GL550 is equipped with a standard 4.7L, 8-cylinder, engine that achieves 13-mpg in the city and 18-mpg on the highway. An Automatic transmission is standard. The $63,600 GL350 BlueTEC is equipped with a standard 3.0L, 6-cylinder, engine that achieves 19-mpg in the city and 26-mpg on the highway. An Automatic transmission is standard.