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Old 10-05-2011, 08:15 AM
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Join Date: Nov 2010
Location: Ooltewah, TN
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no turn signals w201 190d

I've got emergency flashers but nothings happening with the turn signals. No turn lights at all, not just a non-flashing light. I've tried turning the emergency flasher off and on several times along with moving the turn signal stalk back and forth in case it was simply some built up crud.

Any suggestions? Anybody have a link to a wiring diagram for an '85 190d?

added - I found this post which makes it appear the 190's turn signal wiring is different from the 240's and 300's?

Where is the turn signal flasher located on a 190? No one knew, not even the dealer. The tech had to pull out a shop manual and call me back to tell me it was the big combo relay in the fuse box. I have pictures posted of my old one. My signals stopped working and the problem was cured with a new relay. They are very expensive (close to 200 bucks) from the dealer and anywhere online. I got mine off ebay.

Last edited by Walkenvol; 10-05-2011 at 08:39 AM.
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Old 10-05-2011, 08:22 AM
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Join Date: Aug 2009
Location: Chapel Hill
Posts: 1,078
the link is for the w124 but it should be similar enough for the w201

Mercedes Benz Model 124 - OM602, OM603 Maintenance Manuals

good luck
1987 190d 2.5Turbo
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Old 10-06-2011, 03:02 PM
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Join Date: Nov 2010
Location: Ooltewah, TN
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I found a gold colored metal bosch box behind the radio. Is this the turn signal flasher? Is there a way to test it before replacing?
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Old 10-26-2011, 03:56 PM
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Join Date: Nov 2010
Location: Ooltewah, TN
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Hope this follow up helps someone else down the line.

If you have the smaller console mounted emergency flasher switch and your having any problems with your trun signals, then I would reccomend you do this first;
PeachPartsWiki: Cleaning the Hazard Switch

While cleaning my switch I discovered the problem with my turn signals. Those crafty Germans routed the turn signals through the hazard switch which has 3 settings (might appear as 2 settings from the outside) 1. 4 way flashing, 2. no flashing, and 3. turn signal flashing. My hazard switch had some broken plastic shown in the attached pictures and wasn't shifting the contacts into turn signal mode. It would however do the 4-ways and the neutral.

After cleaning, I reassembled the switched with it in turn signal mode and when reinstalled my turn signals were working again. I'll need to replace my broken switch for it to switch between the settings.

I also disassembled the window switches for a good cleaning and regained the use of one of my rear windows so that I now have 3 functioning windows. Passenger's rear works from both the console switch and the door switch but driver's rear works from neither. Guess its time to pull the door panel off and take a look.

As for cleaning both the hazard switch and the window switches, I used a can of spray contact cleaner along with some compressed air to get the nasty drink spills. For the contacts themselves, I got good results from an electric eraser (you older engineering / drafting types know what I'm talking about) and a fingernail file.
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no turn signals w201 190d-flash2.jpg   no turn signals w201 190d-flash1.jpg  
You can't always get what you want, but if you try sometime you just might find you get what you need.
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