Mercedes CLS-Class (2014) is 561 mm (22.09 inch) longer, 82 mm (3.23 inch) wider, 122 mm (4.80 inch) higher and has 370 liters (13.07 ft3) bigger cargo space than Porsche 718 Cayman (2014).
Porsche 718 Cayman (2014) is 334 kg (736 lbs) lighter than Mercedes CLS-Class (2014).