Audi Q7 (2019) is 633 mm (24.92 inch) longer, 173 mm (6.81 inch) wider, 178 mm (7.01 inch) higher and has 605 liters (21.37 ft3) bigger cargo space than Mercedes B-Class (2020).
Mercedes B-Class (2020) is 435 kg (959 lbs) lighter than Audi Q7 (2019).