I've also noticed the squeaky / rattling noise on my 6 weeks old X3 (3000+ KM). I live in City traffic and go in & out of multi-storey / basement car park a lot. The noise is a lot more appearant when doing a slow turn up / down a slop between storeys. Only myself in the car, no cargo, no passenger.

The sound is very annoying... sounds like you are lifting an old and heavy wooden closet. I'm pretty sure it was coming from the plastics / leather on the doors and seats (not from the windows / door seal).

TSB = Technical Services Bulletins? Where can I find the one on this?

Thanks