I've done this tapping into a sunroof wire on previous BMWs and it worked flawless (except the part where you have to rip that dome light down). But my E92 has a switched 12V outlet directly under the glovebox that I just plugged the V1 straight cord into and ran it over to and up the A pillar, then over inside the head liner. Soooooooo easy!
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"The likelihood of one individual being right increases in direct proportion to the intensity with which others attempt to prove him wrong."
2015 F82 M4 - Sakhir Orange Metallic
2013 E92 M3 / 2013 E92 335is / 2010 E90 335i / 2007 E90 335i
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