Buick Regal TourX (2018) is 593 mm (23.35 inch) longer, 76 mm (2.99 inch) wider and has 114 liters (4.03 ft3) bigger cargo space than Mercedes B-Class (2017).
Mercedes B-Class (2017) is 74 mm (2.91 inch) higher and 287 kg (633 lbs) lighter than Buick Regal TourX (2018).