BMW 7 Series (2018) is 412 mm (16.22 inch) longer, 92 mm (3.62 inch) wider, 36 mm (1.42 inch) higher and has 34 liters (1.20 ft3) bigger cargo space than Mercedes C-Class (2016).
Mercedes C-Class (2016) is 415 kg (915 lbs) lighter than BMW 7 Series (2018).