Mercedes C-Class (Estate) (2017) is 324 mm (12.76 inch) longer, 10 mm (0.39 inch) wider, 164 mm (6.46 inch) higher and has 328 liters (11.58 ft3) bigger cargo space than Porsche Cayman (2016).
Porsche Cayman (2016) is 190 kg (419 lbs) lighter than Mercedes C-Class (Estate) (2017).