Buick Regal (2015) is 175 mm (6.89 inch) longer, 425 kg (937 lbs) lighter and has 52 liters (1.84 ft3) bigger cargo space than Mercedes GLC-Class (2017).
Mercedes GLC-Class (2017) is 33 mm (1.30 inch) wider and 176 mm (6.93 inch) higher than Buick Regal (2015).