BMW 3 Series (2015) is 88 mm (3.46 inch) longer, 315 kg (694 lbs) lighter and has 30 liters (1.06 ft3) bigger cargo space than Mercedes GLK-Class (2014).
Mercedes GLK-Class (2014) is 30 mm (1.18 inch) wider and 270 mm (10.63 inch) higher than BMW 3 Series (2015).