Cadillac ATS (2014) is 509 mm (20.04 inch) longer, 117 mm (4.61 inch) higher and has 46 liters (1.62 ft3) bigger cargo space than Mercedes SLK-Class (2020).
Mercedes SLK-Class (2020) is 11 mm (0.43 inch) wider and 49 kg (108 lbs) lighter than Cadillac ATS (2014).