Except for two (genuine MB) diaphragm changes mine still works to spec.

(1985 300TD)

Fred Moir.
Lynn MA.
Diesel preferred.

From: Mercedes <mercedes-boun...@okiebenz.com> on behalf of Jaime Kopchinski 
via Mercedes <mercedes@okiebenz.com>
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
few times.

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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