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      10-26-2010, 10:49 PM   #6
Mace
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Drives: '11 E93 M3
Join Date: Mar 2007
Location: FL

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Unless there's an international difference the Comfort Access keyfob has a replaceable battery as ChuckB mentions. The CA does store the driver's preferences and maintenance codes when inserted in the dash but it doesn't charge. The non-CA keyfob has a rechargable battery that recharges in the dash.
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