BMW 8 Series (G14) (2018) is 157 mm (6.18 inch) longer and 92 mm (3.62 inch) wider than Mercedes C-Class (Estate) (2014).
Mercedes C-Class (Estate) (2014) is 103 mm (4.06 inch) higher, 428 kg (944 lbs) lighter and has 140 liters (4.94 ft3) bigger cargo space than BMW 8 Series (G14) (2018).