Okay, in my earlier 'revelation' I may have used the term
'light' incorrectly. As someone has mentioned since then, the sensor glows
orange in the lower half of the dazzle sensor; which may in fact be just a
pick-up from the amber down-light feature. <?: prefix = o ns = "urn:schemas-microsoft-com

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The Amber downlight
can be turned off though. Just press and
hold
the mirror 'power' button (for the anti-dazzle) and the amber light will be
extinguished also.
As a matter of interest, the amber light only comes on at
a certain darkness level, not at the point of turning your headlights on
(unless it's dark of course).
You can trick it into revealing itself by putting your
thumb over the front r/h sensor (the one I called an orange light)and your left hand over the mirror's rear (windscreen facing)
light sensor; in a few seconds the car thinks it's dark and the amber downlight
will illuminate! It will go off again once your hands are removed, if the ambient light level is bright enough.
All information comes courtesy of my idle curiosity and experimentation whilst sitting in the car waiting for the missus.I have since ordered a 'life' from amazon but,
it could be a while before it's delivered....
Happy tweaking!
-LaZ-