my turn indicator doesn't work - well it works intermittently ;-) but not the way it should be
I looked under the the dash to locate the relay. I found many relays but I didn't find the turn indicator relay.
Could anyone post a picture of where this relay is located exactly?

I have a 1980 300SD Turbodiesel (w116 chassis)

thnx

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'80 300 SD, 300k

On the w116 and early w123 (thru 1980) the relay is inside the hazard flasher switch. Which is why it's a bit large.

Later cars use a separate relay.

The early style switch/relay tends to be very expensive, even used. My advice would be to post a want to buy (WTB) ad on the used parts for sale and wanted subforum on this board to find one for reasonable money.

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Mac
2002 e320 4matic estate│1985 300d│1980 300td
Previous: 1979 & 1982 & 1983 300sd │ 1982 240d

“Let's take a drive into the middle of nowhere with a packet of Marlboro lights and talk about our lives.” ― Joseph Heller, Catch-22

Not too long ago I also had intermittent turn signal problem.

It ended up being a poor chassis ground.
http://www.peachparts.com/shopforum/diesel-discussion/375603-w116-right-front-turn-signal-electrical-gremlin.html

Try cleaning the chassis ground first.

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78 W116 300SD 'Desert Rose' new as of 01/26/2014
79 W116 300SD 'Stormcloud' RIP 04/11/2022

thanks for the write up. I cleaned the grounds that I could find. I also changed the hazard switch itself - I have 3 hazard switches which I cleaned - but the issue is still the same. If I press the hazard switch down then all 4 flasher lights stay on continuously. If I push down/ up the indicator switch then the indicator light stays on as well.

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'80 300 SD, 300k

Looking deeper...according to the FSM there is a solid state flasher unit for the 1980 300SD.

Page 112 of the FSM here shows a solid state flasher unit with two connections to the hazard switch and one connection to the combination switch.

Follow the black/green/white wire from the combination switch (or the black/red or black/green/white wires from the hazard switch) and it (they) should lead you to the elusive solid state flasher unit.

I think it resides in center console area, close to the hazard switch.
I believe the MB Part number is 008211063, and it is available from the forum sponsor.

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78 W116 300SD 'Desert Rose' new as of 01/26/2014
79 W116 300SD 'Stormcloud' RIP 04/11/2022

Part number is one digit short. It should be 0008211063.

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Baton Rouge, LA
1977 300D Non-Turbo

ok - found it - the relay that handles the emergency flasher blinking and the indicators is indeed located under the dash more to the left side above the parking brake.
The issue is that the part number printed on my relay and also the relay that I found in the basement (which I use as replacement) is different than the one here in peachparts.
Anyway the problem is solved and everything works correctly now!
thnx!

Attached Thumbnails

   

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'80 300 SD, 300k

thru 1981 unfortunately

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1981 NA 300D 310k miles