Mercedes CL-Class (2014) is 291 mm (11.46 inch) longer than Mercedes M-Class (2015).
Mercedes M-Class (2015) is 54 mm (2.13 inch) wider, 371 mm (14.61 inch) higher, 70 kg (154 lbs) lighter and has 200 liters (7.06 ft3) bigger cargo space than Mercedes CL-Class (2014).