BMW 4 Series (2020) is 66 mm (2.60 inch) longer and 42 mm (1.65 inch) wider than Mercedes C-Class (Estate) (2017).
Mercedes C-Class (Estate) (2017) is 74 mm (2.91 inch) higher, 5 kg (11 lbs) lighter and has 50 liters (1.77 ft3) bigger cargo space than BMW 4 Series (2020).