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      01-19-2013, 07:53 PM   #4
djseto
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Drives: 2008 M3 Coupe
Join Date: Aug 2012
Location: NC

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I believe it relies on a sensor that is required to detect oncoming traffic/light. I had this feature in my 335i. I worked pretty well but I noticed a lot of new street lights didn't register with whatever sensor they use so it would activate them on some very well lit streets.
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