This is the factory mode. You can always go back within seconds to your factory AWD mode when you cars at the dealer, or you just want optimal traction on a long winter trip.
Let the fun begin! Your xDrive will deliver 100% of it's power to the rear-wheels, exactly if it has come from factory as RWD car. Improves efficiency in Summer and makes the car much more lively.
The Sport-Mode is a totally re-calibrated setup, for the sportive driver. This mode will reduce understeer and makes your BMW easy to drift.
This mode is similar to the AWD-Sport mode, but is optimized for low-friction conditions like Snow, Ice. Recommended for Fun-Driving in Winter!