Chevrolet Volt (2014) is 437 kg (963 lbs) lighter than Mercedes X-Class (2018).
Mercedes X-Class (2018) is 842 mm (33.15 inch) longer, 132 mm (5.20 inch) wider, 381 mm (15.00 inch) higher and has 860 liters (30.37 ft3) bigger cargo space than Chevrolet Volt (2014).