BMW 7 Series (2018) is 705 mm (27.76 inch) longer, 116 mm (4.57 inch) wider and has 28 liters (0.99 ft3) bigger cargo space than Mercedes B-Class (2014).
Mercedes B-Class (2014) is 79 mm (3.11 inch) higher and 465 kg (1,025 lbs) lighter than BMW 7 Series (2018).
