Hello everyone,

My outdoor temp sensor on my 93' 190 has been on the fritz for a while, the display would read partial temperatures/incorrect temperatures until about a week ago.. Now it doensnt display anything, no degree symbol or F or anything.

I believe this might be due to the thermocouple senor being past its prime.

About a year ago, I had some work done on the lower core support and I don't believe they re-install the sensor in its proper place. I think it sat against the radiator a bit.

So after doing some research here I found that I can in fact replace the thermocouple at the end of the wire with another one:

Fenwal #192-302LET-A01 or Thermometrics #EC95F302W

These are fairly cheap and I will pick one up soon, however I am failing to see how I go about installing it. I know the current one has a large metal piece on the end...is that whole thing the thermocouple? or is the thermocouple inside the metal casing? If so how do i go about a getting to it?

If anyone can lend me a hand I'd appreciate it..

Thanks,

Kris

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The display sender unit end can simply replaced by cutting of the old one and joining in the new one . Its basically a NTC resister in a metal body .i did mine by soldering in the wires to the old end .works very correctly for the past year .
mak

I had simply cut off the old one and soldered in a new end bit. Its simply a NTC resister in a metal body .
mak

I soldered an old sensor on down near the front bumper and it worked for a few years. Then that one failed.

I bought a new one from parts supplier in Berlin and that came with a long cable that went right back to the fuse box. I recall it was simply plug and play.

RayH

Further Question:


Occasionally the display will kick on and go all over the place with the temperature. I was on the freeway the other day and it turned on and displayed the temp to be -20F then +20F about a mile later, then it turned off. It is usually off, nothing on the display, completely blank.

Does this sound more like a bad sensor or bad display?

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Cruise Control not working? Send me PM or email (jamesdean59@gmail.com). I might be able to help out.
Check here for compatibility, diagnostics, and availability!

(4/11/2020: Hi Everyone! I am still taking orders and replying to emails/PMs/etc, I appreciate your patience in these crazy times. Stay safe and healthy!)


82 300SD 145k
89 420SEL 210k
89 560SEL 118k
90 300SE 262k RIP 5/25/2010
90 560SEL 154k
91 300D 2.5 Turbo. 241k
93 190E 3.0 235k
93 300E 195k

Sounds like the display unit. I have a spare, ... but alas it's in Michigan.

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Gone to the dark side

- Jeff

Yeah, it was coming on dim a bit today...

I have a display from a w126...but i dont think i can perform a transplant..

__________________
Cruise Control not working? Send me PM or email (jamesdean59@gmail.com). I might be able to help out.
Check here for compatibility, diagnostics, and availability!

(4/11/2020: Hi Everyone! I am still taking orders and replying to emails/PMs/etc, I appreciate your patience in these crazy times. Stay safe and healthy!)


82 300SD 145k
89 420SEL 210k
89 560SEL 118k
90 300SE 262k RIP 5/25/2010
90 560SEL 154k
91 300D 2.5 Turbo. 241k
93 190E 3.0 235k
93 300E 195k