Levels 2s also need less power to charge your car. For the entire duration of the charge, the car runs the battery's thermal management system to keep it at an optimal temperature. The longer you charge, the more power is needed to maintain that temp. So, a faster charge (level 2) uses less power to charge the battery the same amount.
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2005 M3 Coupe, 2004 M3 Wagon, 2001 M5 Sedan, 2008 M5 6MT Sedan, 2012 128i M sport
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