Jeremy,
re: the ACC. Actually, I do have a vacuum leak in the door lock system, If i leave the door unlocked there is not enough vacuum to shut the engine off. Once I lock the door, the engine will shut off. So I will re-check whether the vacuum flaps are working when I get it up to full vacuum and report back.

MTUpower: I do have turn signals, but I will change #12 (If I haven't already)

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1983 300 D