Quote:
Originally Posted by simmo300e
The switch knob itself is not illuminated, apart from the central indicator for the rear fog light, which comes on when the switch is pulled out to the second detent position. The indicators around the switch knob are lit from behind, so either the bulb has blown or the bulb holder is unclipped.
Pull the knob, undo the big nut holding the unit in place and pull the unit out to check. Be careful when you unlip the plastic panel from the dash, it's clipped in and the plastic tongues break easily. The bulb holder clips into the back of the switch unit. If you have vacuum adjustment for headlight level, watch out you don't lose the hoses when you pull the unit out, the job can escalate from something simple to pull the dash nightmare if you are not careful.
You'll probably find the switch comes off in your hand when you try to pull it out to activate the rear fog. If so, you can get some relief by prising the two prongs of the switch unit apart slightly.
good luck
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Hi Simmos, your instruction is pretty clear, but LandYaughtLover mentioned that "What next! Headlight switch will not turn to full on. Just parking lights and fog. If I push hard, they may come on when I hold it but running it out.
At least I found a better way to remove it. Hence the thread. The two threads I read said to pull the knob and remove the nut. Which is fine. But if you have knee impact things you can not just pull it out form behind as suggested. I found that removing the cluster made it a breeze to pull out.
Note: The wiring looks fixed to it. But it basically pulls apart in halves. No need to pry on a connector, etc.
Now I need to see if I can take it apart and fix what I assume is a spring and small ball bering gone off. "
Does your instruction apply for the gen 2 w126 as well?
Also wondering if a newer switch with the light on the center stalk will work on this car? Saw one on craigslist with the description: "95 - 99 Mercedes C230 C220 C280 W202 W124 W126 W29 Headlight Switch OEM 000 545 6004" I'll try to post a picture later.