Thread: Unusual vent noise
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Old 01-20-2008, 01:57 PM
Rockman59 Rockman59 is offline
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Join Date: Aug 2002
Location: La Quinta, CA
Posts: 271
I have an '86 560 SEL and it too makes a thump or click when the vent controls open or close...been doing it since new. As long as your heat/temp/AC works correctly I wouldn't worry about it.
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1986 560 SEL (159K miles)
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