Desperately Seeking Vacuum Diagram for 1981 240D
 

Can't find that year on any of the prior posts/stickies. Any help much appreciated -- after looking for a vacuum leak indicated by the central locking not working after the engine was shut off, I changed a defective master vacuum element on the driver's door, but now the door locks don't work even when the engine is one, so it seems something else got plugged in wrong.

It's in the STICKY's.

Vacuum Diagrams W123 and W126 Models > Central interlock Systems Diagram....