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Thread: Car interior stinks of mildew during startup/vents in use

  1. #1
    Join Date
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    Default Car interior stinks of mildew during startup/vents in use

    This only started a few weeks ago in the Benz. Each time I start the car and turn on the heat or AC, the car reeks fo mildew/mold

    I have a new cabin filter on order. What else should I be looking at? I dont even want to drive the car right now....
    1968 Impala: Status: Stored
    1977 Dodge Triple E RV: Sold
    1989 Mercedes Benz 420 SEL: Sold
    2008 Mercedes Benz C230: Crusing
    2000 Bluebird TC2000: Build phase of skoolie project
    2018 Rav4 XLE: New baby friendly daily

  2. #2
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    Try AC vent cleaner if running the blower without AC on for 10-15 minutes doesn't work?

    https://removeandreplace.com/2013/05...nt-system-diy/

  3. #3
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    Could be the evaporator ? Common issue in newer BMW's.

  4. #4
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    Had this issue with my truck, have been spraying AC deodorizer I’m the cowl vent about once per week to try and clear out the evap core and drains.

  5. #5
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    Is there a drain I can check to see if its blocked? It seems to only be really awful when running the heater, not the AC
    1968 Impala: Status: Stored
    1977 Dodge Triple E RV: Sold
    1989 Mercedes Benz 420 SEL: Sold
    2008 Mercedes Benz C230: Crusing
    2000 Bluebird TC2000: Build phase of skoolie project
    2018 Rav4 XLE: New baby friendly daily

  6. #6
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    Yea the W209 had this as a common issue. You need to run the heater on FULL BLAST for 5 minutes when the car is warmed up after driving - replace the cabin charcoal filter if you have one - also there is a mod to drill a hole in a specific place to allow some small amounts of fluid to come out.

    Dont use recirc mode also,

    https://mbworld.org/forums/clk-class...en-turned.html

  7. #7
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    Piss anyone off lately?

    A little buck piss in the air vents does wonders to your enemies.

  8. #8
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    Nope. We dont even use the car much anymore. My years of "spirited" driving and far behind me
    1968 Impala: Status: Stored
    1977 Dodge Triple E RV: Sold
    1989 Mercedes Benz 420 SEL: Sold
    2008 Mercedes Benz C230: Crusing
    2000 Bluebird TC2000: Build phase of skoolie project
    2018 Rav4 XLE: New baby friendly daily

  9. #9
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    Try to get in the habit of turning off the A/C ~5min from home and running the fan at a higher level until you park. I've been doing that in all my cars for years and have so far avoided any A/C related smells.

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