Smell from AC vent, drain?? 91 300CE mystery - Mercedes-Benz Forum

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post #1 of 2 (permalink) Old 07-20-2010, 09:32 AM Thread Starter
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Date registered: Oct 2007
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Smell from AC vent, drain?? 91 300CE mystery

I've got a weird smell coming from my AC vent.
Maybe it's mold, not sure. Nothing burning.
There was some dark grey foam that recently came out of one of the vents.

Is there a filter for the vent system on this car? Where?

Maybe the drain is plugged, can someone give me a hint where it is?

Thanks a bunch,
Rogerrr is offline  
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post #2 of 2 (permalink) Old 07-20-2010, 03:02 PM
Date registered: Sep 2007
Vehicle: 99 Merc S420 (80k Mi) 07 Lexus LS460 (21k Miles)
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Sounds like mold is growing in your HVAC fresh air intake and possibly inside your evap core. This could be due to a plugged condensate drain line. Locate the blower unit and then look under the car. You should be able find the drain line and clean it out. There are several products made to kill mold inside evap units.
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