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One last 300M problem

One last item has turned up on my 300M. I had previously complained to my dealer that once in a while when you turned off the car, a screech came from under the hood. In other words. after the engine is off there is a 2 or 3 second screach. Of course Chysler could not find a problem. Any ideas? I am wondering if it could be some kind of pressure build up in the ac system causing a problem when the car is suddenly turned off. It just happened twice on me but now I cannot duplicate. It seems more likely when the car hasn't been used for a while and is used for a very short time.

Reply to
Art
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I have isolated the problem to occuring when the car is turned off while the auto climate control is still in recycle air mode. If it is in fresh air mode there is no noise.

Reply to
Art

I ran diagnostics on the auto climate control and it checked out OK but made the sound once so it had nothing to do with turning the car off except for the recirculation door moving. I exercised the door several times with the button and that solved the problem at least for now.

Reply to
Art

I should ask, is there any way to lubricate the mechanism that moves when you hit the recirculation button on a 99 300M?

Reply to
Art

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