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      10-31-2009, 04:48 PM   #5
piezo
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Drives: '07 335i Coupe
Join Date: Feb 2007
Location: New England

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That is most likely the connector for the battery master switch, used during transport and removed before delivery. If you come across threads where people spotted a mystery wire sticking out from beneath the rear seat, they've found the other end of it.
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