BMW X7 (2018) is 758 mm (29.84 inch) longer, 214 mm (8.43 inch) wider, 248 mm (9.76 inch) higher and has 264 liters (9.32 ft3) bigger cargo space than Mercedes B-Class (2018).
Mercedes B-Class (2018) is 1060 kg (2,337 lbs) lighter than BMW X7 (2018).