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      01-31-2013, 01:04 PM   #5
Chitown-Irish
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Drives: 11 X3 xDrive35i
Join Date: Mar 2008
Location: Orland Park, IL

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Quote:
Originally Posted by noka View Post
Lower to the ground does not appear to be a factor, since the rearview mirror operates off the same sensors as the sideview mirrors. What does appear to affect the dimming is the length of time the sensor is seeing the light, with a shorter time required for rearview mirror dimming.
My theory is that the mirrors are higher up that the sensors are not picking up the ambient light from the headlights in back but you probably are right.
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2011 X3 xDrive35i F25 (CPO) Space Grey/Black Leather, Packages: Premium, Cold Weather, BMW Apps, Sirius and Technology. BMW CCA Member (WindyCity Chapter). Former cars: 06 750i E65 (CPO) 07 E90 335i (bought used but had problematic iDrive so sold it to get 7-series)
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