Mercedes GLA-Class (2018) is 14 mm (0.55 inch) wider and 123 mm (4.84 inch) higher than Peugeot 408 (2017).
Peugeot 408 (2017) is 340 mm (13.39 inch) longer, 143 kg (315 lbs) lighter and has 20 liters (0.71 ft3) bigger cargo space than Mercedes GLA-Class (2018).