Mercedes SLK-Class (2020) is 436 mm (17.17 inch) longer and 97 mm (3.82 inch) wider than Opel Adam (2015).
Opel Adam (2015) is 181 mm (7.13 inch) higher, 369 kg (814 lbs) lighter and has 52 liters (1.84 ft3) bigger cargo space than Mercedes SLK-Class (2020).