Pretty sure its a huge BMW thing. I've seen a lot about it on this forum. My dad's 5 and my 3 both do it. It comes and goes, with no realtion to the weather. BMW didn't do anything for it.
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2006 JB 330i/ZPP/ZSP/I-Drive/Heated Seats/L7/Blacklines/19" Gunmetal V710's on Vredestein Ultrac Sessantas/BMS PBX/Red MFD Scoops/Matte black grilles/Matte black Amber Gone 2.0s/BSW center midrange speaker/35% tint/Black and white roundels
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