Mercedes GLS-Class (2020) is 837 mm (32.95 inch) longer, 169 mm (6.65 inch) wider, 384 mm (15.12 inch) higher and has 55 liters (1.94 ft3) bigger cargo space than Opel Ampera (2020).
Opel Ampera (2020) is 788 kg (1,737 lbs) lighter than Mercedes GLS-Class (2020).