Jumping in here to keep the 1980SD 116 thread alive.... I have had a slightly longer shutoff sometimes but not other times and have not mailed it down yet. The other night while turning off the key i starting pumping the brakes 4 or 5 times (to see what would happen given it's part of the vac system) which kept the engine going for an additional 20 - 30 seconds. Have not had the time to investigate further but now more concerned.

Anyone else experience a similar issue? Today the client control would not shutoff until i rotated the temp dial until it was at max cool (AC not working, but that's another thread), pushing the OFF button had no effect. Previously there was a delay in pushing the OFF button and the system turning off, probably 3 - 6 seconds.

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