Mercedes M-Class (2015) is 670 mm (26.38 inch) longer, 109 mm (4.29 inch) wider, 485 mm (19.09 inch) higher and has 355 liters (12.54 ft3) bigger cargo space than Mercedes SLK-Class (2020).
Mercedes SLK-Class (2020) is 695 kg (1,532 lbs) lighter than Mercedes M-Class (2015).