Mercedes B-Class (2020) is 525 kg (1,157 lbs) lighter than Mercedes M-Class (2014).
Mercedes M-Class (2014) is 385 mm (15.16 inch) longer, 130 mm (5.12 inch) wider, 226 mm (8.90 inch) higher and has 285 liters (10.06 ft3) bigger cargo space than Mercedes B-Class (2020).