Audi A4 Avant (2017) is 321 mm (12.64 inch) longer, 38 mm (1.50 inch) wider and has 84 liters (2.97 ft3) bigger cargo space than Mercedes GLA-Class (2015).
Mercedes GLA-Class (2015) is 60 mm (2.36 inch) higher and 155 kg (342 lbs) lighter than Audi A4 Avant (2017).