Citroen DS4 (2017) is 141 mm (5.55 inch) longer, 223 mm (8.78 inch) higher, 17 kg (37 lbs) lighter and has 24 liters (0.85 ft3) bigger cargo space than Mercedes SLK-Class (2017).
Mercedes SLK-Class (2017) is 7 mm (0.28 inch) wider than Citroen DS4 (2017).