Despite its angular design, almost upright windscreen, large exterior mirrors and bigger air dams, the GLK has a low drag coefficient (cd figure) of 0.34, making it one of the class leaders.

Daimler Global Media Site - Despite its angular design, almost upright windscreen, large exterior mirrors and bigger air dams, the GLK has a low drag coefficient (cd figure) of 0.34, making it one of the class leaders.