Ford Mustang (2018) is 396 mm (15.59 inch) longer and 129 mm (5.08 inch) wider than Mercedes B-Class (2018).
Mercedes B-Class (2018) is 161 mm (6.34 inch) higher, 417 kg (919 lbs) lighter and has 154 liters (5.44 ft3) bigger cargo space than Ford Mustang (2018).