Audi Q8 (2018) is 297 mm (11.69 inch) longer, 189 mm (7.44 inch) wider, 252 mm (9.92 inch) higher and has 374 liters (13.21 ft3) bigger cargo space than Mercedes C-Class (Estate) (2017).
Mercedes C-Class (Estate) (2017) is 580 kg (1,279 lbs) lighter than Audi Q8 (2018).