W116, Body and Interior Specific Aid

1982 300sd - intermittent heat

1982 300sd - heater blows warm for about 5 minutes then heated air turns cool. should i replace monovalve, then try solenoid that activates. turning heater to off then back on sometimes results in heat flowing again, but not always. turning car off then restarting returns heated air. i think malfunction in monovalve, but solenoid may be at fault as well. how do you diagnose which piece to replace or both? any sources for solenoid besides dealer?? i noticed you are sold out of solenoid

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1975 300D Door Locks Repair

This weekend I repaired 2 doors using the rubber diaphragm kit from this website. However; on the front passenger door the pull/push knob stem seems to be dis-connected from the rod that is controlled by the actuator to lock and unlock door. Not sure what I need to repair, hard to see.

Also, I'm looking for the driver side door lock switch actuator that has the 3 vacuum lines, 1 in and 2 out but can't locate on this site.

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