E-Class (W211) 2003-2009

battery indicator

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Old Apr 5, 2017 | 03:42 PM
  #1  
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R350 2007 and C300 2012
battery indicator

I have an R350 2007, the battery light indicator turn on but disappear after driving the car for an hour or more. The indicator will turn on again the next day. Do I need to replace the main or the auxiliary battery?
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Old Apr 5, 2017 | 04:42 PM
  #2  
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2018 GLC300 4Matic; 2008 ML550 4Matic; 2004 C320
Wrong part of the forum, yours should be a W251 and you must post here:

https://mbworld.org/forums/r-class-w251-70/


Good luck!
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Old Apr 10, 2017 | 01:42 PM
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R350 2007 and C300 2012
Sorry I am new...still trying to figure out evrything.

Thanks!
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Old Apr 10, 2017 | 06:30 PM
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Originally Posted by bearm300
Sorry I am new...still trying to figure out evrything.

Thanks!
No worries at all, was just trying to help you out in the hopes you would get an answer to your question.
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Old Apr 11, 2017 | 12:42 PM
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1922 Ford Model T / no OBD
Alternators are the same on E, so nothing wrong with hearing from this class owners.
What is the mileage?
Usually guess your Voltage Regulator needs replacement, but monitoring car voltage during driving would answer some questions.
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Old Apr 12, 2017 | 12:26 PM
  #6  
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R350 2007 and C300 2012
Originally Posted by Plutoe
Very strange, but you either have an issue with the charging system or you have issues with consumer(s) not turning off and draining the battery to a point that you are again advised of low voltage! Get the system tested before wasting money
yes indeed very strange. Will do. thank you
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Old Apr 12, 2017 | 12:28 PM
  #7  
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R350 2007 and C300 2012
Originally Posted by kajtek1
Alternators are the same on E, so nothing wrong with hearing from this class owners.
What is the mileage?
Usually guess your Voltage Regulator needs replacement, but monitoring car voltage during driving would answer some questions.
Got about 165,000 mile or so
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Old Apr 12, 2017 | 02:18 PM
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1922 Ford Model T / no OBD
Originally Posted by bearm300
Got about 165,000 mile or so
Yep, that's a good time to think about new alternator brushes aka VR
No guarantee you don't have other problems, but brushes on their last legs is not something you want to leave alone.
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