Buick Regal (2016) is 470 kg (1,036 lbs) lighter than Mercedes S-Class (2020).
Mercedes S-Class (2020) is 414 mm (16.30 inch) longer, 42 mm (1.65 inch) wider, 7 mm (0.28 inch) higher and has 98 liters (3.46 ft3) bigger cargo space than Buick Regal (2016).