Cadillac ATS (2016) 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 (2017).
Mercedes SLK-Class (2017) is 11 mm (0.43 inch) wider and 50 kg (110 lbs) lighter than Cadillac ATS (2016).