Mercedes GLS-Class (2020) is 422 mm (16.61 inch) longer, 100 mm (3.94 inch) wider and 310 mm (12.20 inch) higher than Opel Insignia Sports Tourer (2014).
Opel Insignia Sports Tourer (2014) is 845 kg (1,863 lbs) lighter and has 205 liters (7.24 ft3) bigger cargo space than Mercedes GLS-Class (2020).