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  #1  
Old 08-13-2010, 11:08 AM
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E-320 dash battery light

2005 E -320 battery light comes on dash, battery ok and the charging is ok. It happens in the morning and the battery light goes out in 10 minutes. Any ideas ?

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  #2  
Old 08-13-2010, 11:46 AM
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Join Date: Oct 2004
Location: Baton Rouge La
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i think your voltage regulator might be on its last legs
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1997 s320 154k (what a ride). Sold with 179k miles. Replaced with Hyundai Equus

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Old 08-13-2010, 12:09 PM
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Have both batteries tested. Also, any shop equipped with SDS can check the battery control module for fault codes. The charging system is probably OK, since the warning message goes away after a few minutes.
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  #4  
Old 08-13-2010, 06:26 PM
david s poole
 
Join Date: Mar 2005
Location: dallas
Posts: 1,822
i think that car has two batteries,one small under hood on right side by windshield[said to be for starting]and larger one in trunk.i have replaced a lot of the small batteries.
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  #5  
Old 08-14-2010, 12:14 PM
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Location: Albuquerque, NM USA
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One of your batteries needs to be replaced, as it's losing enough voltage overnight to trip the warning. Usually the small one under the hood goes first.

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