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W203 (2005) Windscreen Defroster flaps not working

Discussion in 'Electrics, Vacuum, Ignition and ECU' started by CBS123, Nov 8, 2012.

  1. CBS123

    CBS123 New Member

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    Can anyone help me with this problem. When I press the quick clear button to direct hot air to the defroster flaps on my front screen I can hear the blower working but the flaps do not open. My MB mechanic plugged in his diagnostic tool and it came up with no faults showing. Any ideas?
     
    Last edited: Nov 8, 2012
  2. whitenemesis

    whitenemesis Senior Member

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    Do you feel air blowing onto the screen and side windows?
     
  3. OP
    CBS123

    CBS123 New Member

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    Hi Whitenemisis

    Nothing from the vents at the bottom of the screen. I get plenty of hot air from the centredash top vent and the face vents but nothing by using the quick clear button.
     
  4. whitenemesis

    whitenemesis Senior Member

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  5. OP
    CBS123

    CBS123 New Member

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    Thanks for that. Have just tried you suggestion but to no avail. Still no air coming out of screen vents.
     
  6. television

    television Always remembered RIP

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    Then the motor or flap linkage faulty
     
  7. OP
    CBS123

    CBS123 New Member

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    Thanks for that. Does that mean the dash etc all has to come out or can they be accessed from under the bonnet?
     
  8. television

    television Always remembered RIP

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    Some can be,,, ask Alex Crow he knows them very well and near you
     
  9. Alex Crow

    Alex Crow Senior Member

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    Did he check flap positions and travel values in climate control?
     
  10. OP
    CBS123

    CBS123 New Member

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    Thank you Alex. To be frank I am not sure as he did check many things. His diagnostic tool originally showed two faults so he did the two button reset (Screen/recirc) and these disappeared but still no air to the screen. No faults showing on diagnostic tool. My mechanic is Brian at Chapel Works Ufford Near Woodbridge who has looked after both my Mercs since they came out of warranty.
     
  11. Alex Crow

    Alex Crow Senior Member

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    With Star diagnostic you can at least check the travel and end stop positions of screen flaps, this would help push diagnosis forward.

    What were the 2x faults showing?
     
  12. OP
    CBS123

    CBS123 New Member

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    Thanks Alex. I am not sure so I will endeavour to ask him and get back to you.
     
    Last edited: Nov 12, 2012

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