Mercedes C-Class (Estate) (2017) is 4 mm (0.16 inch) longer than Opel Astra Sports Tourer (2020).
Opel Astra Sports Tourer (2020) is 4 mm (0.16 inch) wider, 78 mm (3.07 inch) higher, 120 kg (265 lbs) lighter and has 50 liters (1.77 ft3) bigger cargo space than Mercedes C-Class (Estate) (2017).