Mercedes GLA-Class (2017) is 663 mm (26.10 inch) longer, 118 mm (4.65 inch) higher and has 48 liters (1.70 ft3) bigger cargo space than Opel Adam (2014).
Opel Adam (2014) is 162 mm (6.38 inch) wider and 477 kg (1,052 lbs) lighter than Mercedes GLA-Class (2017).