BMW X7 (2018) is 732 mm (28.82 inch) longer, 204 mm (8.03 inch) wider, 243 mm (9.57 inch) higher and has 345 liters (12.18 ft3) bigger cargo space than Mercedes B-Class (2020).
Mercedes B-Class (2020) is 830 kg (1,830 lbs) lighter than BMW X7 (2018).