Had the same problem. One of the bulbs of the heater/blower panel went. Searched different sites, found a dutch one (witch I speak) (with photo's on how to..):
//84.243.232.27/~w001118/viewtopic.php?f=31&t=2494&start=0&st=0&sk=t&sd=a
(add the: http. yourself. I can't post a link - new member
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Now how to change the bulbs:
1: Don't remove the controlknobs!!! Place some sticky tape over all 4 so they can't change position
2: Take a paintersknive (wrap it with a piece of cloth) and gently pry open the complete panel starting at the right upper corner (between then panel and the dash) and then moving to the left (panel has 6 plastic clips), bottom one last. Don't panic if one of the plastic clips pulls out a metal clip (remove it from the plastic clip and up it back in it"s place)
3: Mind the electric wire connected to the panel.
4: Between the heater/blower controlrods there are 2 small bulbs (1,2 watts) (1 between the left rods and 1 between the right rods). Gently remove them (I replaced them both at the same time - 1;5 euro from the dealer)
5: After replacing the bulbs, place the panel (gently) over the controlrods (mind the electric wire). Push the panel back into place (apply force evenly over the complete panel) Mind that the rods slip back into the knobs.
Mission accomplished