The other day I drove the 300 after not driving it for about a week and the turn signals weren't working. They aren't coming on at all. The flasher/hazard switch works and that flashes the signals. After a few trips and turning the car off and on again the signals came back on for about two minutes then they quit again. I did a search and read that the wrong kind of bulb, a double filament bulb, can screw up the circuit but the hazards are still working. Any thoughs? Not sure if it's related but my horn/backup/#14 fuse i believe, keeps blowing.

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1983 300D TurboDiesel

Sounds like you might have a short in the turn signal switch. Pull the rubber cover off and doa visual. Maybe pull it off and give it a look.

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Nah he needs replace his turn signal fluid.

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http://superturbodiesel.com/images/sig.04.10.jpg
1995 E420 Schwarz
1995 E300 Weiss
#1987 300D Sturmmachine
#1991 300D Nearly Perfect
#1994 E320 Cabriolet
#1995 E320 Touring
#1985 300D Sedan
OBK #42

I have the same issue, and it turns out to be the hazard switch. When the turn signals quit on my car, I slowly move the hazard switch until the turn signals work again. I still need to order a new switch.

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RRGrassi


70's Southern Pacific #5608 Fairmont A-4 MOW car

13 VW JSW 2.0 TDI 193K, Tuned with DPF and EGR Delete.

91 W124 300D Turbo replaced, Pressure W/G actuator installed. 210K

90 Dodge D250 5.9 Cummins/5 speed. 400K

Have you tried taking the switch apart and cleaning it.

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No, I have not. I want a new one anyway to get the white triangle icon again.

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RRGrassi


70's Southern Pacific #5608 Fairmont A-4 MOW car

13 VW JSW 2.0 TDI 193K, Tuned with DPF and EGR Delete.

91 W124 300D Turbo replaced, Pressure W/G actuator installed. 210K

90 Dodge D250 5.9 Cummins/5 speed. 400K

The hazard switch is new, as is the flasher relay that's under the shifter area. I replaced those several months ago.
UPDATE: I drove the car for about 30 minutes yesterday and the signals were fine. THey started out not working then after about 5 minutes they started working and continued to work for the rest of the trip...what's going on?

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1983 300D TurboDiesel

Time to check the combo switch...

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RRGrassi


70's Southern Pacific #5608 Fairmont A-4 MOW car

13 VW JSW 2.0 TDI 193K, Tuned with DPF and EGR Delete.

91 W124 300D Turbo replaced, Pressure W/G actuator installed. 210K

90 Dodge D250 5.9 Cummins/5 speed. 400K

How can I check it? The high beams work even when the signals don't. Luckily I pulled a combo switch off an old beater but I don't want to waste the effort unless I know it will help.

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1983 300D TurboDiesel

I had similar prob this AM, but my Temp, fuel gages don't read. Brake wear sensor lite has been blinking at me, thinking it popped a fuse (new brakes, broke all the wear sensor leads).

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CC: NSA

All things are burning, know this and be released.

82 Benz 240 D, Kuan Yin
12 Ford Escape 4wd

You're four times

It's hard to

more likely to

concentrate on

have an accident

two things

when you're on

at the same time.

a cell phone.

www.kiva.org It's not like there's anything wrong with feeling good, is there?

There is a relay on the later 123s (with the small hazard switch) which is located under the console, fwd and too the left of the shifter. Had to replace that on my 85 240D to make my turn singles work.

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1985 Euro 240D 5 spd 140K
1979 240D 5 spd, 40K on engine rebuild
1994 Dodge/Cummins, 5 spd, 121K
1964 Allice Chalmers D15 tractor
2014 Kubota L3800 tractor
1964 VW bug

"Lifes too short to drive a boring car"

Like I stated in my first post. Pull the rubber cover off, and give it a visual look to see if anything is obvious. You might have to pull it off and really look at it on the bench. It sounds like a ground problem. The ground wire in the combo switch could be loose or the wire partially broken. The problem is somewhere in the swtich. Since you've replace the hazard switch and relay, and the bulbs work with the hazards. Intermittent electrical problems are usually bad grounds or connections.

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Sounds like you need to check the grounds behind the cluster.

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That sounds like some solid advice. Many thanks my friend.

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1983 300D TurboDiesel

Let us know what you find.

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