Quote:
Originally Posted by Zacharias
The way you phrased that, I'm not sure if you understood what the other respondent meant by "pops". When you press the automatic button, if either of the manual fan control buttons (above and below it) is pushed in, the manual button will pop out when the auto button is pushed. The auto button doesn't stay pushed in like the others when it has been pushed, it's a momentary switch. Neither does it pop out when one of the manual buttons is pressed to take the system to auto mode for fan control.
If you do need to replace the unit, auto climate control units new were nearly $400 last time I checked. I would suggest you put a 'WTB' (want to buy) posting on the Mercedes Used Parts for Sale subforum (accessible off the main forums page). Lots of folks have parted out w123s over the last few months so someone probably has one lying around for a more reasonable price. I would recommend that you get a unit out of a w123 -- the early w126 series unit looks identical, and some people say they have interchanged them, but technically it isn't the same. (The w123 part has 123 in the part number.)
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Zacharias, thank you so much!
I got it now. I thought it was a momentary, but others said it "popped" like the others.
In my research, I found new units are no longer available, only rebuilt. Price range from about $700 for a Mercedes rebuilt unit to about $165 for ProgRama unit (which appears to have the longest warrenty at three years and unlimited miles). Core is around $25 so shouldn't be hard to get a used unit for about that (I wouldn't pay more than $50). For now the plan is understanding, which has been accomplished, then applying Bounty sheet to the inside of the glass to keep down the fog eliminating the need for high heat.
