Mercedes E-Class (Estate) (2017) is 517 mm (20.35 inch) longer, 54 mm (2.13 inch) wider, 203 mm (7.99 inch) higher and has 508 liters (17.94 ft3) bigger cargo space than Porsche Cayman (2016).
Porsche Cayman (2016) is 506 kg (1,116 lbs) lighter than Mercedes E-Class (Estate) (2017).