FIAT 500X (2018) is 130 mm (5.12 inch) longer, 292 mm (11.50 inch) higher, 29 kg (64 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 (2018).