Mercedes S-Class (2015) is 998 mm (39.29 inch) longer, 89 mm (3.50 inch) wider, 44 mm (1.73 inch) higher and has 120 liters (4.24 ft3) bigger cargo space than Seat Leon SC (2016).
Seat Leon SC (2016) is 932 kg (2,055 lbs) lighter than Mercedes S-Class (2015).