Mercedes M-Class (2015) is 1057 mm (41.61 inch) longer, 295 mm (11.61 inch) higher and has 303 liters (10.70 ft3) bigger cargo space than Opel Adam (2014).
Opel Adam (2014) is 70 mm (2.76 inch) wider and 1064 kg (2,346 lbs) lighter than Mercedes M-Class (2015).