Saw your post in another thread saying the car won't lock with the fob.
Sounds like the ignition switch thinks your key is still in and doesn't want you to lock your keys in the car.
I would check the contact block on the ignition switch.
Should be able to find a schematic here and Ohm it out:
http://www.bmw-planet.com/diagrams/r.../e85/index.htm