159 Auto Dimming Mirror

[Jeffrey]

  Does anyone know how the Auto Dimming rear view mirror in a 159 works.
It appears to have 2 x green LED lights/sensors in the base of the mirror.
Are both of these meant to light up?, Only one does in my car and the dimming does not work all the time.

[alfagtv100 (Biggus)]

Hi Binky,

The LED to the left indicates the auto dimming function is on (when illuminated).  The 'Auto' button switches the function on/off.
The one to the right is actually the light sensor.
Try covering it with your finger when being followed by a car at night.  You will notice glare from the following car become more intense.

I don't know why the dimming would only work some of the time.  I do know that the brighter the lights behind you, the greater the level of dimming.

Cheers,

Marco.