FIAT 500e (2017) is 43 kg (95 lbs) lighter than Mercedes B-Class (2018).
Mercedes B-Class (2018) is 776 mm (30.55 inch) longer, 158 mm (6.22 inch) wider, 30 mm (1.18 inch) higher and has 288 liters (10.17 ft3) bigger cargo space than FIAT 500e (2017).