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 ?

i think your voltage regulator might be on its last legs

__________________
1989 300ce 129k
( facelifted front,updated tail lights, lowered suspension,bilstein sports, lorinser front spoiler, MOMO steering wheel, remus exhaust,stainless steel brake lines). (Gone)

1997 s320 154k (what a ride). Sold with 179k miles. Replaced with Hyundai Equus

1994 e320 Cabriolet 108k



1972 280se 4.5 153k Owned for 12 yrs, sorry I sold it


[/SIGPIC]

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.

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.

__________________
David S Poole
European Performance
Dallas, TX
4696880422

"Fortune favors the prepared mind"
1987 Mercedes Benz 420SEL
1988 Mercedes Benz 300TE (With new evaporator)
2000 Mercedes Benz C280
http://www.w108.org/gallery/albums/A...1159.thumb.jpg

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.

__________________
Kent Christensen
Albuquerque
'07 GL320CDI, '10 CL550. '01 Porsche Boxster
Two BMW motorcycles