BMW 4 Series (2014) is 15 mm (0.59 inch) wider and 10 kg (22 lbs) lighter than Mercedes C-Class (Estate) (2017).
Mercedes C-Class (Estate) (2017) is 64 mm (2.52 inch) longer, 95 mm (3.74 inch) higher and has 45 liters (1.59 ft3) bigger cargo space than BMW 4 Series (2014).