Citroen C5 (2014) is 41 mm (1.61 inch) higher, 280 kg (617 lbs) lighter and has 39 liters (1.38 ft3) bigger cargo space than Mercedes S-Class Coupe (2015).
Mercedes S-Class Coupe (2015) is 247 mm (9.72 inch) longer and 45 mm (1.77 inch) wider than Citroen C5 (2014).