Posting in case someone does a search and comes across this old thread. I just discovered the lift gate light issue on my 2009 35d due to the driver side led going out on me. No error messages for lamps. Took it in to the dealership, mentioned the Service Bulletin and they couldn't do anything for me. I'm nearly 60k and CPO doesn't cover it so unless I want to pay them close to $700 it's not happening. Now I get to go to the other thread I found when researching this issue to see if I can just dismantle it and clean out the contacts and possibly come up with a better way to seal the lights.

__________________
-kp!
2009 X5 35D