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
Saturday, February 10th, 2007 AT 12:45 AM