Quote Originally Posted by ChefJRD
I've the got the same lights out in mine and plan on replacing them when I put in a new radio.

The OBC takes 3 of the black bulbs and the heater controls take one 12V.

Anybody ever replace the thumbwheel bulb or is that just on the E32??
http://www.nmia.com/~dgnrg/page_37.htm
If your center vent thumb wheel has red & blue markings on it...then it is not lit. The e32 vent you link to has a white transluscent marking on the thumb wheel that the light shines thru...and so do early e34s (1989-1993) Sometime in 1993 the center vent was changed and became non-lit.

Notice in the pic below that the thumb wheel has red & blue painted markings...this is the non-lit center vent from my 95 525iT.



Notice the white transluscent marking on the center vent thumbwheel in this pic below...this indicates a lighted thumb wheel.