Cadillac ATS (2016) is 107 mm (4.21 inch) longer and 375 kg (827 lbs) lighter than Mercedes GLK-Class (2016).
Mercedes GLK-Class (2016) is 34 mm (1.34 inch) wider, 279 mm (10.98 inch) higher and has 69 liters (2.44 ft3) bigger cargo space than Cadillac ATS (2016).