Buick Regal (2014) is 66 mm (2.60 inch) higher and 110 kg (243 lbs) lighter than Mercedes CLS-Class (2016).
Mercedes CLS-Class (2016) is 109 mm (4.29 inch) longer, 25 mm (0.98 inch) wider and has 118 liters (4.17 ft3) bigger cargo space than Buick Regal (2014).