Rear view mirror - how can I break it ?

applied on light-sensitive E39 interior mirror : put a piece of adhesive ribbon (not transparent) on the little black circle on glass'mirror.

Works very well too on mine. Wouldn't be without it.

Cover up the sensor with something that blocks the light - black tape should do it. You can see the sensor on the mirror.

Should be a knob to switch it off - check the manual.

Hey... I'll trade you if they interchange... I have a 98 740iL, e38, and the mirror doesn't dim. It is supposed to but doesn't. rick

Is the light sensor blocked?

Thanks or the replies. I think Luc's idea sounds worth a try. Thinking about it, I assume the that it works ( darkens ) when the sensor on the mirror glass gets more light than the sensor on the windscreen side. Covering the sensor on the glass could very well work - I'll let you know.

The one on my M3 doesn't work. BMW simply say "computer says no". The one on my E38 does work but does it differently. If I have the lights on but it's not dark then I can't see much out of it, regardless of any sensors.

No it is not blocked. Is there a fuse or anything that would cause it not to work? thanks rick

I can not see any difference at any time. I raise the rear sunshade so that the lights are not as strong. rick