Mercedes GLA-Class (2017) is 1715 mm (67.52 inch) longer, 171 mm (6.73 inch) wider, 56 mm (2.20 inch) higher and has 245 liters (8.65 ft3) bigger cargo space than Smart Fortwo (2017).
Smart Fortwo (2017) is 613 kg (1,351 lbs) lighter than Mercedes GLA-Class (2017).