GMC Terrain (2016) is 21 mm (0.83 inch) longer, 39 mm (1.54 inch) wider, 242 mm (9.53 inch) higher and has 1312 liters (46.33 ft3) bigger cargo space than Mercedes C-Class (2018).
Mercedes C-Class (2018) is 303 kg (668 lbs) lighter than GMC Terrain (2016).