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2006 E500 Wagon | 2004 E55 | 2014 E350
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Discussion Starter #1
Should the aux battery voltage be any different than the trunk battery voltage while charging? I'm trying to figure out why my battery died over night and while looking at the voltages through iCarsoft, I noticed the aux battery was reading 12.6V while the charging system was putting out 13.8V. That seems a little wonky IMO. I didn't check it with a volt meter though
 
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