Mercedes CLS-Class (2020) is 27 mm (1.06 inch) longer and 26 mm (1.02 inch) wider than Opel Insignia Sports Tourer (2017).
Opel Insignia Sports Tourer (2017) is 96 mm (3.78 inch) higher, 175 kg (386 lbs) lighter and has 40 liters (1.41 ft3) bigger cargo space than Mercedes CLS-Class (2020).