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roberto 11-28-2003 11:16 PM

190e dashboard removal !!!
Does anyone know if there is another way to repair/replace the potentiometer without removal of the dash on my 1993 190e 2.3. My mechanic says this is 8 hours labour. I am not getting any heat and we troubleshooted everything else.heater valve,control unit etc.
Apparently the 190e has a complicated climate system and the potentiometer is not getting any feedback to open the valves for heat?
Any suggestions?

haasman 11-29-2003 01:25 AM

It is my understanding that you can reach the potentiometer after removing the instrument cluster. Your mechanic may need short/stuby screw driver but according to the Mercedes Repair CD it is possbile.


roberto 11-29-2003 01:38 PM

Thanks I will ask the mechanic if this is possible. It should save a lot of labour cost.
Where do you get the repair cd?

xp190 11-29-2003 05:14 PM

Just to calrify, you want ot get at the climate controls? the console that has the turn wheel the slider and the three buttons?

That's a 5 minutes job if you have the same setup as me. First take out the ash tray, then take out the two vent grates on the left and right. Undo the two scres that you will be able to access once you remove those, then remove the two scres from the air ducts above the console and it all comes out, pull it slightly forward to get at the cables and pull them out one by one, no need to worry they are all different size and only fit into one place.

8 hours? with a different setup maybe.


haasman 11-29-2003 05:53 PM


I believe he is speaking about the potentiometer that sits on top of the unit that holds the heater core and is directly under the dash.


roberto 11-29-2003 08:19 PM

yes I have already tested the climate control (push button unit and temperature dial) by pulling it out and switching with a new one.Thanks anyway XP
I am talking about the potentiometer in the dash that Haasman is talking about.
This has been a complicated process,even the mercedes mechanics disagree with each other about fixing this problem.
Haasman do you have any links to websites with this diagram of what the potentiometer looks like?

haasman 11-29-2003 08:45 PM

1 Attachment(s)
Here are some pictures, sorry about the quality.

The third picture shows you where it is located in relation to the windshield and how it sits on top of the heater/blower unit, just under the dash cover.

Hope this helps,


roberto 12-02-2003 02:31 PM

Thanks for the photos.One mechanic doesn't think it can be done through the instrument cluster as he thinks its too tight.
I am asking a few different ones to find out.
Anyone else here know for sure if the airmix control can be installed through the instrument cluster?

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