BMW 4 Series (2013) is 565 kg (1,246 lbs) lighter than Mercedes M-Class (2015).
Mercedes M-Class (2015) is 166 mm (6.54 inch) longer, 101 mm (3.98 inch) wider, 426 mm (16.77 inch) higher and has 245 liters (8.65 ft3) bigger cargo space than BMW 4 Series (2013).