Audi A4 Avant (2018) is 314 mm (12.36 inch) longer, 38 mm (1.50 inch) wider and has 84 liters (2.97 ft3) bigger cargo space than Mercedes GLA-Class (2016).
Mercedes GLA-Class (2016) is 60 mm (2.36 inch) higher and 155 kg (342 lbs) lighter than Audi A4 Avant (2018).