BMW X4 (2018) is 71 mm (2.80 inch) wider, 182 mm (7.17 inch) higher and has 10 liters (0.35 ft3) bigger cargo space than Mercedes C-Class (Estate) (2014).
Mercedes C-Class (Estate) (2014) is 15 mm (0.59 inch) longer and 315 kg (694 lbs) lighter than BMW X4 (2018).