Quote:
Originally Posted by Qsilver7
As other's have mentioned...the early e53 X5s with the permanent 32/68 split torque...uses ABS/ASC+T/DSC (aka DSC-X) to facilitate part of its AWD functionality. The info below says that a critical slip ratio greater than 5% will cause traction control regulation to occur (see info under "traction control system overview {ASC)"}. This can be in the form of engine throttle reduction or the application of ABS braking:
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This.
The deleted (by me) image goes on to say that the DSC will be activated when the speed difference is 2 mph, or greater. I'm not sure what this means in terms of tire rotations per mile, but the OP should be pretty close to getting his DSC to activate.