Mercedes GL-Class (2015) is 1399 mm (55.08 inch) longer, 2 mm (0.08 inch) wider, 357 mm (14.06 inch) higher and has 293 liters (10.35 ft3) bigger cargo space than Opel Adam (2014).
Opel Adam (2014) is 1494 kg (3,294 lbs) lighter than Mercedes GL-Class (2015).