BMW 5 Series (2018) is 519 mm (20.43 inch) longer, 63 mm (2.48 inch) wider, 5 mm (0.20 inch) higher and has 148 liters (5.23 ft3) bigger cargo space than Mercedes GLA-Class (2016).
Mercedes GLA-Class (2016) is 320 kg (705 lbs) lighter than BMW 5 Series (2018).