Cadillac XTS (2015) is 713 mm (28.07 inch) longer, 56 mm (2.20 inch) wider and has 104 liters (3.67 ft3) bigger cargo space than Mercedes B-Class (2020).
Mercedes B-Class (2020) is 61 mm (2.40 inch) higher and 192 kg (423 lbs) lighter than Cadillac XTS (2015).