BMW 8 Series (G15) (2018) is 48 mm (1.89 inch) wider than Mercedes E-Class (Estate) (2020).
Mercedes E-Class (Estate) (2020) is 52 mm (2.05 inch) longer, 155 mm (6.10 inch) higher, 13 kg (29 lbs) lighter and has 250 liters (8.83 ft3) bigger cargo space than BMW 8 Series (G15) (2018).