Mercedes S-Class (2015) is 963 mm (37.91 inch) longer, 83 mm (3.27 inch) wider, 31 mm (1.22 inch) higher and has 120 liters (4.24 ft3) bigger cargo space than Seat Leon (2016).
Seat Leon (2016) is 932 kg (2,055 lbs) lighter than Mercedes S-Class (2015).