So I have always thought something might be up with my mirror in my car because it never seemed to auto dim very much.
Then I caught an episode of Wheeler Dealers where they bought an E39 M5 and had to replace the rear view because it had the fluid mark.
Once installed they covered the light sensor on the back of the mirror to test the auto dimming and obviously it dimmed.
I have done this with my mirror and I get no dimming at all. Is there anything else besides the sensor that can break? Or should I just replace the Mirror and be done with it?