Mercedes E-Class (2017) is 421 mm (16.57 inch) longer, 268 mm (10.55 inch) wider, 128 mm (5.04 inch) higher and has 356 liters (12.57 ft3) bigger cargo space than Porsche 718 Cayman (2020).
Porsche 718 Cayman (2020) is 372 kg (820 lbs) lighter than Mercedes E-Class (2017).