Mercedes B-Class (2017) is 140 mm (5.51 inch) longer, 100 mm (3.94 inch) higher and has 16 liters (0.57 ft3) bigger cargo space than Peugeot 308 (2019).
Peugeot 308 (2019) is 18 mm (0.71 inch) wider and 75 kg (165 lbs) lighter than Mercedes B-Class (2017).