This test doesnt prove anything! Typical BMW sales stunt. you cant tell if the ESP has been deliberately turned off to make the car fail in the Merc and Audi. Complete load of bollocks. By turning off the ESP the cars wheel will just spin away till the cows come home. By having ESP on the 4wd system will regulate wheel spin and send drive the wheels with the most grip. This test shows all the wheel spinning like crazy. Complete crock