Buick Regal Sportback (2018) is 308 mm (12.13 inch) longer, 92 mm (3.62 inch) wider, 25 mm (0.98 inch) higher and has 139 liters (4.91 ft3) bigger cargo space than Mercedes C-Class (Coupe) (2014).
Mercedes C-Class (Coupe) (2014) is 137 kg (302 lbs) lighter than Buick Regal Sportback (2018).