BMW 4 Series (2015) is 274 mm (10.79 inch) longer, 66 mm (2.60 inch) wider and has 24 liters (0.85 ft3) bigger cargo space than Mercedes GLA-Class (2016).
Mercedes GLA-Class (2016) is 111 mm (4.37 inch) higher and 190 kg (419 lbs) lighter than BMW 4 Series (2015).