BMW X3 (2018) is 37 mm (1.46 inch) wider and 180 mm (7.09 inch) higher than Mercedes E-Class (Estate) (2017).
Mercedes E-Class (Estate) (2017) is 187 mm (7.36 inch) longer, 103 kg (227 lbs) lighter and has 120 liters (4.24 ft3) bigger cargo space than BMW X3 (2018).