BMW 4 Series (2013) is 15 mm (0.59 inch) wider than Mercedes C-Class (Estate) (2014).
Mercedes C-Class (Estate) (2014) is 48 mm (1.89 inch) longer, 80 mm (3.15 inch) higher, 90 kg (198 lbs) lighter and has 45 liters (1.59 ft3) bigger cargo space than BMW 4 Series (2013).