Mercedes CL-Class (2018) is 240 mm (9.45 inch) longer than Porsche Cayenne (2018).
Porsche Cayenne (2018) is 82 mm (3.23 inch) wider, 271 mm (10.67 inch) higher, 35 kg (77 lbs) lighter and has 180 liters (6.36 ft3) bigger cargo space than Mercedes CL-Class (2018).