Mercedes M-Class (2015) is 269 mm (10.59 inch) longer, 110 mm (4.33 inch) wider, 333 mm (13.11 inch) higher and has 103 liters (3.64 ft3) bigger cargo space than Seat Leon ST (2017).
Seat Leon ST (2017) is 300 kg (661 lbs) lighter than Mercedes M-Class (2015).