BMW 5 Series (2014) is 707 mm (27.83 inch) longer, 120 mm (4.72 inch) wider, 127 mm (5.00 inch) higher and has 98 liters (3.46 ft3) bigger cargo space than Mercedes A-Class (2015).
Mercedes A-Class (2015) is 405 kg (893 lbs) lighter than BMW 5 Series (2014).