Mercedes M-Class (2015) is 1106 mm (43.54 inch) longer, 206 mm (8.11 inch) wider, 304 mm (11.97 inch) higher and has 303 liters (10.70 ft3) bigger cargo space than Opel Adam (2017).
Opel Adam (2017) is 1064 kg (2,346 lbs) lighter than Mercedes M-Class (2015).