What is this for?

[Trennschleifer13400]

Hi,

Can anyone tell me what the following are for (see picks, red circle)? I can’t seem to find their description in the user manual. One is a switch on the climate control panel; the other is a flap that sits behind the rear view mirror. On the side facing the windscreen there is a small hole, which seems to emit a red light (not to be confused with the ambient lighting).
The car is an Audi A4 Avant 2.0 TDI 170ps, date of manufacture 12/06.
Sorry my written German is not too hot, but I can read it.

Thanks.

[Hille2001]

the second picture,this ist to fight against the sun 😉
when the sun comes into the Car in the middle of your Front Window and your Driver Sun Protect is to small

i hope you understand what i mean 😉

[Trennschleifer13400]

Cheers Hille 🙂

But it has a small hole with a red light? I could understand if it was a small sun flap, but its not.

[Achsmanschette3703]

The button in the first picture is for the air ducts nozzles. Push it and you will see what happen. 😉

[Schattenparker13930]

Hello T-Bag,

the first picture is for the air entrance in the middle from your panel. The air comes only from there, if you push this switch.

[Schattenparker13930]

Do you see the hole from inside or outside the car? Maybe you mean the lightsensor for the mirrrow.

[Trennschleifer13400]

Thanks,
So when I press the switch the airflow is restricted to the air ducts. I have tried it before, but can’t say that I noticed a difference, except that the car seemed ‘smelly’.

[Trennschleifer13400]

Outside, at first I thought it might be some kind of light sensor....

[Schattenparker13930]

You can feel a real difference, if you take the air ducts on high.

It have to be the light sensor, if you see the hole from the outside your car.

[Trennschleifer13400]

Thanks Audi-Fan,
So if it is a light sensor, then what is it for? To switch on my lights when it gets dark?

[Hille2001]

do you have a "Auto" Sign on your Light Switch?
if yes ,you must have a light sensor for beginning darkness.

There it gives an other Light sensor ,must be in your rear mirror if you have self dimming mirrors

[Schattenparker13930]

I mean the light sensor is for the automatic dipping rear view mirror and I think for the automatic light. It takes automatically the light from the car in the night on. For this feature you need the light switch with Auto setting.

[Trennschleifer13400]

Yes Hille, I have an 'Auto', but the funny thing is that you can move the 'flap', and the sensor is no longer pointing out the windscreen. When I do this then the lights still switch on when it gets dark.

[Schattenparker13930]

Are you sure that the senor pointing out the windscreen? I don´t think that a red light shining out the windscreen.

I have light sensor too, but my sensor haven´t a light.

[Trennschleifer13400]

Does it look like this?
heh, maybe it used to be a Police car 🙂