300te rear condensation

Discussion in 'General Discussion' started by brucemillar, Oct 31, 2011.

  1. brucemillar

    brucemillar MB Enthusiast

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    Folks the rear screen in my 300te takes an age to de-mist. The de-mister is working as you see the lines appear as it starts to heat.

    Any tips to stop or reduce condensation or to speed up the de-mist.

    There are no holes in the car and all window seals are good.
     
  2. bolide

    bolide MB Enthusiast

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    I expect there's lots of damp & condensation in the car. Try putting a dehumidifier in there for 72 hours - I expect you'll get half a gallon of water out of it

    Lift the rear seats, open the 7-seat compartments & the rear side compartments and pull up the floor mats to get the best results

    Have a look under the front floor mats with the car parked nose-down - you may get a shock!

    Nick Froome
    the independent Mercedes Estate specialists
     
  3. GP801

    GP801 MB Enthusiast

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    Check the compartments under the floor in the boot. (where the extra seats fold if you have them) There is often a lot of condensation here. Dont know why. I thought ours must have a leak but turned out it was all just condensation. If you have aircon turn it on. Its really powerful on a 124 if working properly
     
  4. GP801

    GP801 MB Enthusiast

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    You beat me to it Nick. On ours it was only in the boot. The rest was bone dry. It must accumulate over the years. Since drying it out 18 months ago there has been no recurrence so far.
     
  5. WOODYTHEWISE

    WOODYTHEWISE MB Enthusiast

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    Hi, if you do not have a dehumidifier just place a plastic storage box containing salt in the back of your car,(lid off) if your car is damp you will have a storage box of water in the morning. just keep replacing the salt until it remains dry. A lot of old time caravaners use this trick. Salt is hydroscopic so takes moisture from the air. Cheap as chips.
     
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  6. Charles Morgan

    Charles Morgan MB Enthusiast

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    It it amazing how damp these places can be, but my heating elements show signs of age - some parts of the rear screen clear far more rapidly than others. Not surprising at 16 years old!
     
  7. OP
    OP
    brucemillar

    brucemillar MB Enthusiast

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    I will give the salt a bash. I have had all the carpets out already and done the uphill/downhill bit. No water.

    Last few nights I have noticed the rear side and screen misting up.

    No evidence of damp In either of the rear cubby holes or under the carpets.
     
  8. GP801

    GP801 MB Enthusiast

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    Might just be atmospherics. Temperature difference between glass and air perhaps. Humidity? Dont really understand it but sometimes our cars will have loads of condensation on the glass even during daytime and at other times nothing. I am sure someone can explain this but its beyond me
     
  9. carat 3.6

    carat 3.6 MB Enthusiast

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    Lift the offside rear seat up, you should find the vacumm unit for the central locking. It is incased in a foam block which can act like a sponge, take this out and I bet it is damp underneath. The sound proofing can lift over time and trap water in there as well.
     
  10. MD5

    MD5 MB Enthusiast

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    Have you looked behind the side storage panels? Mine has had water running down from under the windows inside, where they tend to rust, out of sight.
     
  11. grober

    grober MB Master

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    The rear windows on w124 estates tend to leak with age- its a known weak spot. It's a tricky DIY to achieve a tidy result so don't go piling in W124 leaky rear windows - solutions? - Mercedes-Benz Owners' Forums Other places to check are rear light cluster seals and make sure the vent flaps on the rear inner wings behind the boot trim are functioning OK.
     
  12. WOODYTHEWISE

    WOODYTHEWISE MB Enthusiast

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    Further to my last. I find the large bags of cooking salt best (why I hear you ask) because the better table salts contain something to help stop the salt getting damp in the kitchen. Also the larger the suface area the better,ie on a tray. For those who have not tried this before put a saucer of salt in the kitchen, or on the bedroom windowsill, you will soon see why I use this method.
     
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