GMC Terrain (2016) is 171 mm (6.73 inch) longer, 9 mm (0.35 inch) wider, 132 kg (291 lbs) lighter and has 1342 liters (47.39 ft3) bigger cargo space than Mercedes GLK-Class (2017).
Mercedes GLK-Class (2017) is 15 mm (0.59 inch) higher than GMC Terrain (2016).