I had a driver rage moment and hit the windshied wiper knob. Needless to say it broke free. I have damage to the interior parts of the seering column. I was trying to find a blow-up view of the steering column. So I can get part numbers and see how to get it apart.
You are most likely best off taking it to the dealer and paying to have it fixed due to the complexity of the system interactions and the special software and programming required with the E9x series cars. If you insist on fixing this yourself, the dealer is the only place you are going to be able to find the parts and they are VIN specific. Sorry, next time dont hit the car.