Mercedes S-Class (2020) is 747 mm (29.41 inch) longer, 112 mm (4.41 inch) wider, 51 mm (2.01 inch) higher and has 200 liters (7.06 ft3) bigger cargo space than Opel Ampera (2017).
Opel Ampera (2017) is 488 kg (1,076 lbs) lighter than Mercedes S-Class (2020).