Mercedes CLS-Class (2018) is 136 mm (5.35 inch) longer and 375 kg (827 lbs) lighter than Mercedes M-Class (2014).
Mercedes M-Class (2014) is 44 mm (1.73 inch) wider, 371 mm (14.61 inch) higher and has 170 liters (6.00 ft3) bigger cargo space than Mercedes CLS-Class (2018).