BMW 5 Series (2014) is 195 mm (7.68 inch) longer and 350 kg (772 lbs) lighter than Mercedes M-Class (2015).
Mercedes M-Class (2015) is 26 mm (1.02 inch) wider, 228 mm (8.98 inch) higher and has 251 liters (8.86 ft3) bigger cargo space than BMW 5 Series (2014).