Mercedes S-Class Coupe (2015) is 196 mm (7.72 inch) longer and 69 mm (2.72 inch) wider than Peugeot 508 (2017).
Peugeot 508 (2017) is 73 mm (2.87 inch) higher, 375 kg (827 lbs) lighter and has 130 liters (4.59 ft3) bigger cargo space than Mercedes S-Class Coupe (2015).