My '80 300D has developed serious climate control (and other) problems since I replaced the CC servo. I replaced it because it was killing my battery. Now my LO/HI/BI does not work. The A/C only comes on with DEF and then it blows hot. My engine does not shut off right away after I turn the ignition off. The door locks will not all unlock normally.
Do I have a vacuum, vacuum/electrical, vacuum/electrical/AC problem? Please help.
Thanks

...my guess, vacuum/electrical.
Start with the vacuum first (starting at the pump, trace the lines, replace any old fiber sheathed rotten rubber connectors). Then see whats leftover...start by inspecting (very diligently) the fuses.
-Larry

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03/83 300D 184k
07/73 280 160k