BMW 4 Series (2015) is 42 mm (1.65 inch) longer, 515 kg (1,135 lbs) lighter and has 95 liters (3.35 ft3) bigger cargo space than Mercedes GLC-Class (2017).
Mercedes GLC-Class (2017) is 20 mm (0.79 inch) wider and 276 mm (10.87 inch) higher than BMW 4 Series (2015).