Hey! gldfshkpr, Did you try searching some other forums like,
http://forums.bimmerforums.com/forum/index.php
http://www.bimmerfest.com/
When I bought my car it had a problem code for a leaky emission tank! I counld not find it for anything, so I just kept searching the all BMW forums! Then I found somebody with a thread that had the same problem!!!
On the other hand when I installed my struts & springs I damaged 1 of the speed sensors. There was no way of telling which one it was, so I bit the BULLET & brought it to a bmw dealer shop just to get a diagnosis, they charged me 1 hour labor, which was $125.00 & told me that the left front speed sensor was not working. They wanted to do the job for $350.00. I DECLINED, paid the $125.00 & bought the sensor on-line for about $80.00 bucks & did it myself. So you have some options!!!