So I pulled the rear tail lights and gave them a close look. Unfortunately found nothing. They looked perfect with no corrosion. I removed all bulbs (Osram) cleaned contacts anyway. At this point Im thinking ard may have something with the FRM as it appears to control those functions in the E70 and lots of other BMW's. I ordered the inner tail lights as the originals were warped and taking on water when washing the X then looking into repair options.

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Old enough to know better but young enough not to listen