Hi there,
I've searched the forum for intructions on how to replace the lighting of the temp wheels on the climate control heating panel and I couldn't find anything.....so I decided to have it go myself.........

. I'm not fully done yet I've added some pics which might be helpfull.....
First you have to remove climate control heating panel from console in the middle. To be able to do this you first have to remove the radio....if you have one.....

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Then on the left handside (And only on the left handside) of the heating panel, there is a lip which holds the unit in place. With a flat screwdriver you can tilt it just a little putting a little force to the backend of the whole unit at the same time...et voila it's out on one side. The other side is kept in place by a small solid ridge on the panel itself. (No movement parts..)
Remove the three connectors and you can take the panel inside for a closer look.
Remove the cover of the unit by unscrewing the 4 little torx screws on each corner and detach the fanconnector.
Then you have to remove the axles which go through the knobs and then into the potmeters on the IC. You have to do this otherwise the IC won't go out of the black housing.
Now you can gently tilts the whole IC out of the housing and you will spot the 3 bulbs (2 whites and in the middle something like an orange one).
The 2 whites are gone by me so I have to replace them with something similar.
A little soldering would be no problem as everything is easy accessible.