BMW 4 Series (2014) is 245 mm (9.65 inch) longer and 39 mm (1.54 inch) wider than Mercedes B-Class (2014).
Mercedes B-Class (2014) is 195 mm (7.68 inch) higher, 190 kg (419 lbs) lighter and has 41 liters (1.45 ft3) bigger cargo space than BMW 4 Series (2014).
