BMW 8 Series (G14) (2018) is 20 mm (0.79 inch) wider than Mercedes CLS-Class (2017).
Mercedes CLS-Class (2017) is 97 mm (3.82 inch) longer, 78 mm (3.07 inch) higher, 148 kg (326 lbs) lighter and has 170 liters (6.00 ft3) bigger cargo space than BMW 8 Series (G14) (2018).