Except for two (genuine MB) diaphragm changes mine still works to spec.
From: Mercedes <mercedes-boun...@okiebenz.com> on behalf of Jaime Kopchinski
via Mercedes <firstname.lastname@example.org>
Sent: 14 February 2018 10:31
To: Mercedes Discussion List
Cc: Jaime Kopchinski
Subject: Re: [MBZ] W123 Monovalve final solution - make it vacuum controlled?
Another fix for something that isn’t broken.
If you use a genuine MB monovalve insert, they work just find. In fact,
the climate control works exceptionally well when repaired correctly. That
is, it requires no adjustment at all by the user.
I haven’t touched mine in weeks or months, except for pressing defrost a
It’s a shame these kits are installed when the effort would be better
spendt on just making it work as designed. The cars have run for 30-40
years with the original design, why change it now?
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