BMW 5 Series (2020) is 651 mm (25.63 inch) longer, 87 mm (3.43 inch) wider, 45 mm (1.77 inch) higher and has 189 liters (6.67 ft3) bigger cargo space than Mercedes A-Class (2020).
Mercedes A-Class (2020) is 289 kg (637 lbs) lighter than BMW 5 Series (2020).