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whats that buttom like thingy?

deano1978 Jul 8, 2013

  1. deano1978

    deano1978 different gear

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    upfront on the front dash speaker,there's like a little button. anyone know more?
     
  2. Cabbyfan

    Cabbyfan Active Member

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    If its what I think you are referring to it is a sensor that detects sunlight in the car and helps the heating / air con work.
     
  3. deano1978

    deano1978 different gear

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    really. well i never knew that.
     
  4. Az

    Az Hard slammed!

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    I always thought the climate control worked off of the outside temp sensor? and the sensor on top of the dash was for the dashboard display to dim when it's low light outside?
     
  5. Greeny233

    Greeny233 It's all about the V8. Team V8 Team Silver Audi S4 Audi Avant Owner Group

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    I always thought it was something to do with the alarm. Either a infrared movement sensor or a sensor for the key remote.
     
  6. AlexGSi2000

    AlexGSi2000 Well-Known Member VCDS Map User

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    Yeah, think its the RF antenna for the alarm.

    The instrument dimming sensor is within the speedo dial.
     
  7. SmoothAssault

    SmoothAssault Will design for mods

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    I just took my whole dash out, the Haynes described it as a light sensor.
     
  8. quattrojames

    quattrojames Moderator Staff Member Moderator Audi A6 Audi Avant Owner Group

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    Just to check? Blimey, that's dedication! lol
     
  9. SmoothAssault

    SmoothAssault Will design for mods

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    Haha, yes, of course! ;)
     
  10. GeoffDunk

    GeoffDunk Well-Known Member Team Panther Audi RS4 quattro Audi Avant Owner Group

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    Is it the item circled in the picture?

    If so its the sunlight sensor, along with the outside temperature and the sun sensor the system calculates the correct temperature to issue from the climate system.

    Its to combat the greenhouse effect caused by the glass.

    All modern vehicles have them and they are only for cars with climate, not simple air conditioning, I seem to remember its something Saab implemented first.

    sun-sensor.jpg
     

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