Cadillac XTS (2015) is 840 mm (33.07 inch) longer, 72 mm (2.83 inch) wider, 68 mm (2.68 inch) higher and has 168 liters (5.93 ft3) bigger cargo space than Mercedes A-Class (2016).
Mercedes A-Class (2016) is 422 kg (930 lbs) lighter than Cadillac XTS (2015).