Mine were worn through the wires. I was quoted a price of $65 each by the idiot at the authorized stealer. Because of the "price " I thought it was a much more expensive proximity switch . that was the reason for the how does it work question. (unanswered) I have a very limited amount of time to work on my car and its 85 miles to a good parts house. So the more I know the better. Oh well they are cheep and easy to replace. (now I know)
Jon J

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Jon J.
81 240D