GMC Terrain (2015) is 314 mm (12.36 inch) longer, 63 mm (2.48 inch) wider, 127 mm (5.00 inch) higher and has 1306 liters (46.12 ft3) bigger cargo space than Mercedes B-Class (2014).
Mercedes B-Class (2014) is 353 kg (778 lbs) lighter than GMC Terrain (2015).