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#1
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Tiny bulb, headlight on/off switch on 123/126
Small problem but big mystery. I pulled the headlight on/off switch out of both my 123 and my 126 and have replaced the tiny light bulb in both. Neither one works, nor have I ever seen them work. When is this light supposed to come on? Is there a fix?
Thanks.
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Bruce 73 220D (never left Germany) 81 300D (totaled) 84 300D (Purchased '03, sold '17) 85 300SD (purchased 10/01/03) |
#2
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the light is suppose to come on when you pull the knob out to engage the fog lights... other than that being cause of 'human error', im not sure what else would keep them from illuminating... mine dosn't work but it dosnt really bother me
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1983 Euro 240D 277K 2016 Mazda 6 Coming Soon, 2013 Mercedes E350 Bluetec Formers: 2012- Mazda 3 2007 Outlander- complete pile 1995 E300 Diesel 208K 2007 VW Passat 2.0T ![]() 2003 Jaguar X-type 3.0 Sport Sold 04/11 w/88K 2009 Lexus RX350 9061 miles. Sold 04/09 2008 Mitsubishi Lancer GTS:Totaled Sept.,09 @ 24,000 2003 Infiniti I35 58K Sold 1984 300 turbo diesel 222K |
#3
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It comes on when you turn on the rear fog light by pulling the switch out two clicks.
-J
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1991 350SDL. 230,000 miles (new motor @ 150,000). Blown head gasket ![]() Tesla Model 3. 205,000 miles. Been to 48 states! Past: A fleet of VW TDIs.... including a V10,a Dieselgate Passat, and 2 ECOdiesels. 2014 Cadillac ELR 2013 Fiat 500E. |
#4
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Since US versions are not equipped with rear fog lights, one should expect the indicator light in the switch to never illuminate.
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#5
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Yup
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#6
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Thanks to all. You have solved the mystery.
__________________
Bruce 73 220D (never left Germany) 81 300D (totaled) 84 300D (Purchased '03, sold '17) 85 300SD (purchased 10/01/03) |
#7
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It's been many years since I installed the little lamp, but I seem to remember jumping 2 terminals of the switch and nothing more. Mine illuminates as it should - on the last detent. You just a wiring diagram of the switch. The switch is the same - Euro or US
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![]() Don't Chrome them; polish them |
#8
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Perhaps on earlier cars, but 2nd Gen W126s lack both the light socket and contact inside the switch
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