I tried the left/right/left trick again this morning...no luck. The DSC button has no effect on the 4x4 light, which stays on. Hill Descent does not work.

So judging from previous posts, I need to pull codes now. It could be a wheel sensor, the steering angle sensor, yaw sensor, or the transfer case worm gear bit.

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Reno, France near Deutschland
E70 40d LCI nicely kitted out but no bling stuff
E53 3.0d facelift with manual gearbox
E39 530i facelift with manual gearbox
And a couple lesser vehicles of necessity