BMW 4 Series (2016) is 190 kg (419 lbs) lighter than Mercedes CLS-Class (2017).
Mercedes CLS-Class (2017) is 242 mm (9.53 inch) longer, 12 mm (0.47 inch) wider, 34 mm (1.34 inch) higher and has 75 liters (2.65 ft3) bigger cargo space than BMW 4 Series (2016).