BMW 5 Series (2018) is 313 mm (12.32 inch) longer, 89 mm (3.50 inch) wider, 61 mm (2.40 inch) higher and has 99 liters (3.50 ft3) bigger cargo space than Mercedes CLA-Class (2018).
Mercedes CLA-Class (2018) is 230 kg (507 lbs) lighter than BMW 5 Series (2018).