FIAT 500X (2017) is 139 mm (5.47 inch) longer, 305 mm (12.01 inch) higher, 105 kg (231 lbs) lighter and has 15 liters (0.53 ft3) bigger cargo space than Mercedes SLK-Class (2017).
Mercedes SLK-Class (2017) is 21 mm (0.83 inch) wider than FIAT 500X (2017).