I was following a similar post but found myself hijacking it Engine won't shut off only when climate control is OFF, otherwise shuts off fine


Problem: Engine not shutting down unless Climate Control is on Defrost. Using hand-pump vacuum to CCU from engine compartment (Green tube at 4-way connector near firewall) will not hold vacuum.

Investigation: Removing CCU wood trim - remove 2 screws at bottom of wood trim just above radio (check), remove the 3 upper switches (Int rear lights, Antenna, Rear window defog), slide whole unit down and out, remove 4 screws holding wood trim to CCU. Found Green vac tube with black stripe disconnected from whatever it connects to, the CCU I assume. The black rubber vac tube connection section at the free end was a little wet with oil and the rubber is soft not able to retain vac tube. Plugging the black rubber connector with golf tee and then pulling vacuum from engine compartment holds.

OK, here is where i don't know how to proceed. Having found the problem i don't know how to remove the remaining connections to allow access to replace black rubber vac rube connection section and then reattach Green vac tube to where ever it goes.

Side note - can someone explain the thin black wires that attach to the switches (Int lights has 1, Antenna has 2, Rear window defog has 2, AC has 2). Fiber optic lights???

Chris

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1985 300D, 250k
1980 300SD, 180K