Mercedes C-Class (Coupe) (2017) is 50 kg (110 lbs) lighter than Opel Insignia Sports Tourer (2014).
Opel Insignia Sports Tourer (2014) is 227 mm (8.94 inch) longer, 46 mm (1.81 inch) wider, 104 mm (4.09 inch) higher and has 204 liters (7.20 ft3) bigger cargo space than Mercedes C-Class (Coupe) (2017).