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OUTSIDE MIRROR NOT DEFROSTING

Discussion in 'Electrics, Vacuum, Ignition and ECU' started by DWM1973, Dec 26, 2012.

  1. DWM1973

    DWM1973 Active Member

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    Hi evereyone, my car C320CDI (W204) has the option on its datacard 249 INSIDE AND OUTSIDE MIRROR AUTOMATIC DIMMING.

    To me it looks like the nearside mirror glass has been replaced as it is not the same as the offside, it also does not defrost.

    Can the glass be changed on its own or do you need to replace the full assembly?.

    If possible I would like to get it back to the auto dimming type.

    Thanks.
     
  2. television

    television Always remembered RIP

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    If the offside mirror is an auto dimming glass it will not be the same as the passenger side as these are just heated, if you fold the mirrors a lot then it could be a broken wire within the mirror.

    The mirrors heat up automatically at temps below 15c
     
  3. EmilysDad

    EmilysDad Senior Member

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    As high as that? :confused: They must always be heating up then in the UK :lol:
     
  4. television

    television Always remembered RIP

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    That what it says in WIS, the earlier systems operated at a much lower temp
     
  5. EmilysDad

    EmilysDad Senior Member

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    I believed you Malc :), just seems to be quite a high-ish temp threshold ...... maybe it'd be easier/cheaper to tie them in with when the heated rear screen was turned on. ;) ;)
     
  6. JEZ.S320L

    JEZ.S320L Active Senior Members

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    Heated mirrors also keep themselves clear when it's p1ssing down - which it does most of the time in the UK, except when it's snowing.! :D
     
  7. OP
    DWM1973

    DWM1973 Active Member

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    Thanks for your replies.

    The mirrors are never folded, they make that awful noise when you do and sound as thought they are going to break so I never fold them.

    Is it easy enough to take off the glass and check the power supply to it with a multimeter.
     
  8. television

    television Always remembered RIP

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    I can send you the work sheets for removing the glass and the cover, you can then put a voltmeter over the two wires :D
     
  9. Miffy

    Miffy Senior Member

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    I think its normal to have just the Drivers and Interior mirror auto dim, passenger door is normal to just be heated.

    Even if you do take it off (which is easy) I am sure you will just see a single pair of wires for the heating. If they are autodimming, then yes there will be another pair of wires but they are only powered when in dimming mode.

    The heating side of it, has I think a small temp sensitive switch on the back of the mirror. To test you could a, check the supply voltage if any and b, use an aresol turned upside down to spray the gas onto the switch
     
    Last edited: Dec 27, 2012
  10. SL55 Mark

    SL55 Mark Senior Member

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    Mine are auto dimming, heated, dip when reversing, and fold themselves in when the car is locked. And I can remember when mirrors were just mirrors. Unbelievable. :shock:
     
  11. television

    television Always remembered RIP

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    While you are playing with the mirrors, do get some silicon or PTFE and spray in the fulcrum point where they swivel on and they will go quiet, you may have to help them to start with but they will go silky smooth.
     
  12. television

    television Always remembered RIP

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    Do not forget the the drivers glass on your cost £300
     
  13. SL55 Mark

    SL55 Mark Senior Member

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    O dear. Hope it doesn't break then, or it'll be replaced by normal glass @ £2.50 ! :D
     
  14. television

    television Always remembered RIP

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    Thats what other folk do :D:D Its worse when they leak as the liquid inside works like paint stripper on the door
     
  15. OP
    DWM1973

    DWM1973 Active Member

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    Thanks. A WIS would be very useful.

    If I can work out how to PM I'll send my email address.

    Thanks again.
     
  16. television

    television Always remembered RIP

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    Sorry I cannot do PM's just pop your Email address up here for a few mins and you can edit it out straight after they are sent
     
  17. OP
    DWM1973

    DWM1973 Active Member

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    Thanks.
     
    Last edited: Dec 27, 2012
  18. television

    television Always remembered RIP

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    OK and 2 papers sent,, please go back and edit out your address :D:D
     

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