Cadillac XTS (2014) is 739 mm (29.09 inch) longer, 65 mm (2.56 inch) wider and has 23 liters (0.81 ft3) bigger cargo space than Mercedes B-Class (2017).
Mercedes B-Class (2017) is 56 mm (2.20 inch) higher and 417 kg (919 lbs) lighter than Cadillac XTS (2014).