Citroen DS4 (2020) is 14 mm (0.55 inch) wider and 187 kg (412 lbs) lighter than Mercedes B-Class (2020).
Mercedes B-Class (2020) is 144 mm (5.67 inch) longer, 36 mm (1.42 inch) higher and has 46 liters (1.62 ft3) bigger cargo space than Citroen DS4 (2020).