PeachParts Mercedes-Benz Forum - W123 climate control, which one is easier to troubleshoot

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W123 climate control, which one is easier to troubleshoot

Looking at a 300D N/A with old style climate control system. Wondering if anyone who has experienced the various types of CCU systems and has an opinion about which one is easiest to fix/troubleshoot/maintain? Does the new improved servo fix the problem?

Kevin

1979 240D manual
1984 190D manual

Cannot speak from experience but there is a solid-state electronic replacement for the old-type servo ACC that I think you are referring to -- you didn't mention the year of the 300D your are looking at. It is expensive, about $700, I think, but apparently works well. My mechanic just put one in a 1970s SL and he reported that the customer liked it.

The latest version (ACC III) is easier to repair and less expensive, or so I have read here. I wouldn't let the servo alone dissuade me from buying that car (but the lack of a turbo would :D).

Jeremy