Question about 1980 Mercedes-Benz 280 SLC

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W126 mercedes indicator and the dash gauges not functioning please help cant find the location of the correct relay

280 se 1983 w126 model

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Posted on Jan 02, 2017

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SOURCE: Service manual for 1986 300se W126 Mercedes Benz

The best deal in town is

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You get the same information,pictures and specification as the pro.
BTW, everything is print-able for the whole year.

Posted on Jul 15, 2009

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SOURCE: where is the headlight relay located on a mercedes

box under the bonnet right hand side??? or was that the bmw?? my old timers is catching up with me sorry about this ,i will remember soon or was it behind the glovebox ??

Posted on Sep 20, 2009

  • 1 Answer

SOURCE: Mercedes 300SE W126 electric rear window fails to close

Squirt some WD40 around the swtich to let it leak in behind. Wipe off the excess. Your window will work again. Done this several times on several old MBZs.

Posted on Dec 26, 2009

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SOURCE: 1988 w126 mercedes 300SE heater only works after

Aux heat pump maybe failing. Its on the passenger side by the battery. Follow the hoses. Its moves water to the heater core.

Posted on May 14, 2010

  • 1 Answer

SOURCE: Fuse location on Mercedes Sprinter 312D 1999

Mercedes Benz S550 problem with taking park and wont turn on

Posted on Jul 25, 2010

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1981 MB 300sd where is the back up light switch located anb how I can change my self please

It is located on the side of the transmission built into the neutral safety switch and unless you have worked under a car correctly before, I would advise against it...make sure you dont have any blown fuses or burned out bulbs that would cause the reverse lights to not place I have found for MB info is this forum..registration is free and tech threads a plenty....yours is a W126 body
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No brake lights or back-up lights fuses are good need wiring diagram

Its you headlight/bulb out indicator relay under the screwed down area behind your fuse box. Its longest relay in there. Failure rate for that age of vehicle is high for that part. Expensive new but cheap if you can get them froma bone yard. Also most W126 body styles have them also like the SEL's and SE's.

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All the gauges stopped working on a 1989 mercedes 300sel and I suspect a relay that is bussing. The part # is 201-821-00-47. The relay is 3 1nches long by 1 1/4 in wide by 2 1/4 in tall.

happened to me the same thing taday on a 1988 190E, just noticed that brake lamps and reverse lamps didn´t work either, fuse was OK but I replaced it anyway and now everything is working fine

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1 Answer

Indicators not working on mercedes benz 200 1983 model

If you indeed check and veify the fuses are good than you need to check the relay(s) that control the system. These should all be located in the power box located drivers side firewall under the hood (Black cover). You may need to reference your manual for the relative position of the affected componenets (Fuse, Relay, etc...)

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Mercedes Benz Model 200, year 1983

There aren't many people dealing with the W126 these days. The best place is ebay. Otherwise you could end up paying a small fortune at a specialist dismantler. But before you leap, look up the parts for the E class W124, many items were the same. Good luck

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