Mercedes S-Class (2016) is 390 mm (15.35 inch) longer and 40 kg (88 lbs) lighter than Porsche Cayenne (2016).
Porsche Cayenne (2016) is 55 mm (2.17 inch) wider, 198 mm (7.80 inch) higher and has 170 liters (6.00 ft3) bigger cargo space than Mercedes S-Class (2016).