Buick Regal TourX (2019) is 107 mm (4.21 inch) longer, 85 mm (3.35 inch) higher, 141 kg (311 lbs) lighter and has 60 liters (2.12 ft3) bigger cargo space than Mercedes E-Class (2018).
Mercedes E-Class (2018) is 209 mm (8.23 inch) wider than Buick Regal TourX (2019).