Lightbulb replacements

Hi,

I have a Mercedes 300 SE -88. I'm trying to find out how to replace the lightbulbs in the center dash for the AC knobs (fan speed) and the lightbulb to the automatic gear drive indicator. It seems like some of the dash lights are fiber optics, but I cant find the location of the lightbulbs..

Anybody that knows?

Thanks in advance,

Peter