MI128:
The good news, assuming you are a CCA member, is that they just added two new Ombudsmen to their program, which is intended to serve as an intermediary in just these kinds of dealer/customer disputes. I suggest you first see if the Factory Engineer is able to resolve the issue to your satisfaction. If not, I'd next consider using the CCA Ombudsmen Program.
If you're not a CCA member, you should probably consider it regardless of this issue's outcome. Excellent monthly periodical, lots of regional events, truly unique national events (Watkins Glen this year), and other member services like the excellent technical support only a keyboard away when corresponding with Mike Miller. Sample copy of the
Roundel is on-line for you to review.
http://bmwcca.org
Good luck. Keep us posted.
Jack