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Old 11-16-2009, 06:56 PM   #25
sna77
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Join Date: Jan 2005
Location: MA
Posts: 7,704
My Ride: BMW
For anyone who wants to do this, but doesn't have the wiring already (i.e. not existing auto-dim), i wrote a DIY back in 2005...

http://forum.e46fanatics.com/showthread.php?t=238962
http://www.bigpatsfans.com/mirror/compass.htm
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