W211 AMG Discuss the W211 AMG's such as the E55 and the E63

Battery Light On Dash!!!!!!

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Old Jan 31, 2008 | 02:39 PM
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Battery Light On Dash!!!!!!

I getting a check engine light displaying a RED BATTERY.I keep taking it in to the dealer and they have changed the battery and connectors,but the red battery keep appearing when i go on long trips.....two to three hours of contineous driving and the red battery light appears.....around town driving no problem.I have the heavy duty pump wired to the small battery and believe
that this may be draining the battery.Has anyone here had this experience?If so what was the fix.
e
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Old Jan 31, 2008 | 04:21 PM
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2004 E55 Silver Pewter Metallic
I have the same thing going on except it is on all the time. When this problem first started i noticed that the keyless go and the keyless entry stopped working. If u find a solution or an answer please let me know. I have not had a chance to have it looked at.
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Old Feb 1, 2008 | 01:04 AM
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Come on guys give us some help here....i am sure someone else have had this experienced .I have seen this posted somewhere before where some one was having similar problem.
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Old Feb 1, 2008 | 02:42 AM
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2013 CLS63 2004 S55
I was getting random low battery, convenience options not available and had to torque down the battery connects.
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Old Feb 1, 2008 | 02:45 AM
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2003 E55 AMG
There is a recall on the seat modules for some cars.. I know there are some people that have experienced the seat motors not turning off and draining the battery while being parked overnight.

Get to a dealer and have them run a FULL SYSTEM TEST in STAR DAS. It will go through all the modules and check for faults.

If the faults dont show up, ask them to check for the seat control module recall.. i dont know the exact name for the bulletin but it has something to do with the seats.

Originally Posted by jamusa
Come on guys give us some help here....i am sure someone else have had this experienced .I have seen this posted somewhere before where some one was having similar problem.
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Old Feb 1, 2008 | 03:18 AM
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2013 CLS63 2004 S55
So the seats are supposed to make alternating noises after shutting off the car? I tried to nap in there and heard noise for about 5 mins, that eventually disappeared or I dozed off.
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Old Feb 1, 2008 | 09:08 AM
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very easy fix. had auxillary lights wired to small battery under plastic cover on upper left side of engine compartment and battery light would come on after half hour of lights on. mbz said there is a dedicated empty plug in fuse block. have them wire it there so it taps into the central electrical system.
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Old Feb 1, 2008 | 09:52 AM
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my mechanic wired it to the main fuze box.....we will see what happen when i go on a trip
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Old Feb 1, 2008 | 12:03 PM
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BrianS's Avatar
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2004 E55 AMG
Maybe the alternator or voltage regulator module? See attachment.
Attached Files
File Type: pdf
P-SC-20050070017.pdf (587.4 KB, 1290 views)
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Old Feb 1, 2008 | 03:36 PM
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My mechanic had already checked and change those modules,so i am going to see if this wireing to the main fuse box will help any.
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Old Feb 2, 2008 | 05:37 PM
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nick 55's Avatar
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GL550, C55, 335i Coupe, vintage Mustang
I'm going to guess the alternator voltage regulator, even though it was replaced under a campaign, may be faulty again. I have seen a handful of the campaign regulators fail within a year.
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Old Feb 2, 2008 | 07:15 PM
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you can`t wire anything to the aux battery, it is only charged for a short time after starting depending on battery voltage, if drive on a long trip the battery discharges below the allowed voltage and will turn the light on
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