The 2013 Mercedes-Benz GLK-Class is available as a 4-door, 5-seat sport utility. Starting at $39,090, the 2013 Mercedes-Benz GLK-Class GLK 350 AWD is powered by a 3.5L, 6-cylinder engine mated to an automatic transmission that returns an EPA estimated 19-mpg in the city and 24-mpg on the highway. The top of the line 2013 Mercedes-Benz GLK-Class GLK 250 BlueTEC AWD, priced at $38,590, is powered by a 2.1L, 4-cylinder engine mated to an automatic transmission that returns an EPA estimated 24-mpg in the city and 33-mpg on the highway.