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Old 12-07-2010, 01:44 AM
86560SEL's Avatar
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W126 - headlamp switch illumination light replacement?

Hi. I have been driving my old (now moms) W126 for the past three days as my work car is in the shop and tonight I noticed that the light that illuminates the headlight switch is not coming on now. I am assuming that the bulb has given it up after 22 years of use? Also wondering how difficult this bulb is to replace and how? Really not a necessary light, but looks funny now with it not illuminating. Its a '88 W126.


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Old 12-07-2010, 09:34 PM
One step at a time
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curious about this too. It seems like mine used to light up, but has not in quite some time. I had my lower dash panel off recently to replace the ignition housing and looked around for a bulb or bulb holder and did not see one.

1985 300SD 322,000
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Old 12-07-2010, 10:17 PM
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I've wondered about this as well on my 300CE. I do recall reading sometime ago that they were not illuminated. Maybe someone else can confirm this?
1989 300CE
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Old 12-07-2010, 10:21 PM
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LOL, well spoke too soon... drove it again tonight and its illuminating. Apparently the bulb is loose or on its way out.

I dont remember if my old '85 W126 had this light or not.

Cant comment on the other series Mercedes, not sure if they had it illuminated or not.
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Old 12-07-2010, 11:35 PM
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That feature came out with the Gen2 W126 in 1986 (along with the W124). It's a 1.2w bulb that is clipped to the back of the escutcheon around the headlamp switch. The original was frosted, but a clear one works fine.

1991 350SDL. 230,000 miles (new motor @ 150,000).

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Old 12-07-2010, 11:51 PM
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Pull switch knob. Might be very, very stuck. But it pops off. Then remove the large nut. From there the face plate comes off pretty easy. The light is on a short wire harness. Pretty easy to replace.
1991 560 SEL / 185k miles
1992 750il / 17k miles - project car
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Old 12-08-2010, 12:02 AM
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Thanks, well the light is working again, so it must be a loose bulb, or one about to go south. lol. At least I know how how to access it. Thanks!

Thanks for the info on it being a gen 2 W126... I didnt think I had noticed it on my 85 W126.

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