I continue to get intermittent 'check rear lights' and 'check brake lights' messages, when both appear on check to be working fine. I towed last Saturday with a light trailer [1 7/8ths ball, maybe 1500 lbs of hay and trailer] and the lights [parking, turn and brake] worked through a 7 to 4 prong adaptor. I'm stopping by the dealer tomorrow am to have the computer reprogrammed to recognize the hitch electronics: they quote me $215 for this service. Typical ..... The service rep. passing on the info told me E70s absolutely required this, and checked with the diagnostic tech who reported [as some here reported] that at least late version E53s required the same. Hopefully, this will clear the warning faults, too.

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2006 X5 3.0 6-spd w/Evo UUC ssk
sport/premium pkgs
born Valentine's Day, 2006.