Mechanics

DEFROSTER VENTS EMIT SOUNDS WHEN I TURN ON HEAT

Mercedes Benz Other

When ever I turn on the heat on full, it starts making this humming sound that comes out of the windshield defroster vent above the dash. It sounds as if the air being passed through is being deflected off of something to make a humming, whistling kind of sound. Please help.

1998 Mercedes-Benz CLK 320, 102,000 miles, 3.2 liter
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Mmk
February 10, 2007.



It sounds like maybe a piece of paper has dropped down the defroster vent.

Tiny
Bhugg
Feb 22, 2007.


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