Audi Q7 (2018) is 366 mm (14.41 inch) longer, 159 mm (6.26 inch) wider, 298 mm (11.73 inch) higher and has 530 liters (18.72 ft3) bigger cargo space than Mercedes C-Class (2018).
Mercedes C-Class (2018) is 615 kg (1,356 lbs) lighter than Audi Q7 (2018).