BMW 8 Series (G16) (2019) is 396 mm (15.59 inch) longer and 122 mm (4.80 inch) wider than Mercedes C-Class (2017).
Mercedes C-Class (2017) is 35 mm (1.38 inch) higher, 449 kg (990 lbs) lighter and has 40 liters (1.41 ft3) bigger cargo space than BMW 8 Series (G16) (2019).