I hope that the specialist from München will be able to pinpoint the issue for you, it certainly does not sound right from what you described in your post.
If all fails I would consult another dealership in a near by city such as San Marino or Venice I'm sure they let you have a loaner while they investigate and / or correct the issue.
PS. Small town BMW dealerships are not the best to handle such issues also I would not put too much hope in the so called specialist form München, I speak from personal experience from past issues with my former Bimmers.
Last edited by Mr. ///M3 RD; 12-01-2012 at 12:33 PM.
Reason: added PS