BMW 5 Series (2018) is 651 mm (25.63 inch) longer, 87 mm (3.43 inch) wider, 66 mm (2.60 inch) higher and has 228 liters (8.05 ft3) bigger cargo space than Mercedes A-Class (2019).
Mercedes A-Class (2019) is 320 kg (705 lbs) lighter than BMW 5 Series (2018).