Mercedes M-Class (2015) is 745 mm (29.33 inch) longer, 146 mm (5.75 inch) wider, 344 mm (13.54 inch) higher and has 335 liters (11.83 ft3) bigger cargo space than Seat Ibiza (2017).
Seat Ibiza (2017) is 1059 kg (2,335 lbs) lighter than Mercedes M-Class (2015).