Mercedes GL-Class (2020) is 233 mm (9.17 inch) longer, 142 mm (5.59 inch) wider, 337 mm (13.27 inch) higher and has 120 liters (4.24 ft3) bigger cargo space than Opel Insignia Sports Tourer (2014).
Opel Insignia Sports Tourer (2014) is 980 kg (2,161 lbs) lighter than Mercedes GL-Class (2020).