1992 Temp Gauge - 190E

[meltedpanda]

Helping out a friend, her temp guage does not work, I have read that the 3 pole plug on top of the thermostat housing is the sender .
I cannot find a part number , nor can I find the specs for it to test. I guess it could be in the guage

Help or thoughts appreciated!

[Zulfiqar]

I believe that 3 prong thing is the aux fan high speed switch and A/C compressor cut out, the temp sensor should be a single pole sensor.

[JamesDean]

I believe Zulfiqar is correct, the dash gauge is a single pole unit. On the m103 I think its on the head somewhere not in the thermostat housing. I'm not sure about the m102. There is also a 4 pin unit that provides temp signals to the EZL and CIS-E computer.

[meltedpanda]

hmm that is why this is so confusing , there is one on the water pump , single pole , but I have been told that is not it...

I Actually dealt with this awhile back
Lost in a sea of senders on this 190E (1992)

and never did resolve it -- a temp guage that does not work ,and lots of senders.

[Zulfiqar]

the 4 pin one is for EZL- CIS etc, the single pin on the water pump housing would be for shift softening, the three prong is for the A/C cutout and high speed fan kick on, the temp needle sender would be about in the middle of the head or near the firewall.

Usually MB engines have 3 sensors. Some have 4 for shift softening.

[meltedpanda]

I'll have a look!

[meltedpanda]

anyone with part number ?

[meltedpanda]

A0055422617 EPC shows this as part number , but where it goes still baffles me. It looks like the one on the side of the water pump, I know that is no it

[JamesDean]

That part number looks correct. I think they moved the around a bit on the m103. When I get a chance I'll look on mine.

[Holmesuser01]

Here it is on a 1984-85 190E 2.3 To the left, below the 3 up on top that you can see. Has a single wire plugged onto it.

[meltedpanda]

Thanks all, I tried to gorund the plugs of all the single poles I could see and nothing happend to the guage. perhaps I have a bad guage, and thanks for the picture , not quite the same as mine I have two on the top, no single poles and one on the water pump, all I can see

[mbdoc]

2.3 OR 2.6 engine?
It matters because they use a Special sensor in the 2.3 engine.

The 1991-93 2.3 uses what looks like an aux fan switch on earlier cars.

It is a 3 pole black sensor in the head, the single pole is for the temp gauge.

[meltedpanda]

it is a 2.3 - 4 banger, is it shown in this picture?
http://www.peachparts.com/shopforum/attachments/tech-help/44302d1179451372-lost-sea-senders-190e-1992-sv300011.jpg

[mbdoc]

The 1991-93 2.3 uses what looks like an aux fan switch on earlier cars.

It is a 3 pole black sensor in the head,

the single pole is for the temp gauge

[Holmesuser01]

They keep changing these cars. No wonder they cost so much!!!

Hope that you can now get your temp gauge working. Try grounding the terminal (with the switch on) now.