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Battery dies in 2 days

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E-Class (W211) 2003-2009

Battery dies in 2 days

 
Old 05-14-2019, 06:49 AM
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2005 E320 4matic wagon
Battery dies in 2 days

Hi there, my 2005 E320 wagon began showing a low battery error in the dash. Then it was dead on morning. I removed the battery which was only 3 years old. Went and got another one and that one drained in 3 days. I clearly have a problem with something electronic staying on when the car is off. I am going to go look with a meter to see what the Off current is out of the battery. We were having an issue before this happened with the rear door latch not shutting correctly. It used to have a motor that pulls the latch in after you shut it. That stopped a few weeks ago and then the battery started to drain. Just wondering if anyone has seen a similar scenario. The car has 125K on it. IT was fine until we took it to a shop for new rear Air bags. Since that shop worked on the car we have had issues. It took 5 trips to the shop to get Airbags to stay full. The shop said there was a rash of Arnote defective bags. They replaced one side 3 times. Wondering if there is wiring in the area they might have hurt with all that work.
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Old 05-14-2019, 07:51 AM
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W211 E320 CDI Sportpackage With Carlsson CD32 Chip 2004
Bcm is dead.
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Old 05-14-2019, 08:02 AM
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2005 E320 4matic wagon
Body control module ?

So where is this lovely piece of electronics hiding? Can one buy a good service manual for a W211. I own 6 cars and this is my first MB. Don't know much about it.
Thanks
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Old 05-14-2019, 08:09 AM
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It's about $300 to replace. $150 for parts and another $150 for labor. Could be a bad alternator as well...or voltage regulator. Pull some codes.
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Old 05-14-2019, 08:16 AM
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W211 E320 CDI Sportpackage With Carlsson CD32 Chip 2004
Originally Posted by Bob Gifford View Post
So where is this lovely piece of electronics hiding? Can one buy a good service manual for a W211. I own 6 cars and this is my first MB. Don't know much about it.
Thanks
Battery control module. Check in the trunk. There is a black box with a mass cable attached to it. Check it out.
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Old 05-14-2019, 08:17 AM
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W211 E320 CDI Sportpackage With Carlsson CD32 Chip 2004
Originally Posted by rustybear3 View Post
It's about $300 to replace. $150 for parts and another $150 for labor. Could be a bad alternator as well...or voltage regulator. Pull some codes.

This is a diy forum. Labor costs nothing to urself.
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Old 05-14-2019, 11:32 AM
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'71 Pinto
Originally Posted by Bob Gifford View Post
Went and got another one and that one drained in 3 days.
Need to check for current consumption before replacing parts. For tailgate lock (fastener) replacement shop part # 2117400136, 2117400235 used, and/or current 1647400635 used/new. See attachments.
Attached Files
File Type: pdf
File Type: pdf
Replace BCM wagon.pdf (402.2 KB, 8 views)
File Type: pdf
Center trim.pdf (134.2 KB, 5 views)
File Type: pdf
R SAM 03-05.pdf (32.1 KB, 4 views)
File Type: pdf
tailgate lock.pdf (214.0 KB, 3 views)
File Type: pdf
handle strip.pdf (168.5 KB, 3 views)
File Type: pdf
tailgate lining.pdf (228.1 KB, 3 views)

Last edited by konigstiger; 05-15-2019 at 11:24 AM.
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Old 05-14-2019, 02:51 PM
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2008 E350 4Matic, 2011 E350 4matic
Originally Posted by Bob Gifford View Post
So where is this lovely piece of electronics hiding? Can one buy a good service manual for a W211. I own 6 cars and this is my first MB. Don't know much about it.
Thanks
The MB service manual is the WIS. You can buy a knock off version on eBay for around $6.60. A little hard to figure out. Once you do though, you can pull up documents like above. The legit version is MB's startek, but that costs $60 for 24 hours of access.

https://www.ebay.com/itm/Latest-2019-Mercedes-WIS-ASRA-EPC-Service-Repair-Workshop-Manual-Full-version/123679649919

https://www.startekinfo.com/StarTek/subscribe.jsp
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Old 05-14-2019, 08:38 PM
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Originally Posted by Maroc_Specops View Post
This is a diy forum. Labor costs nothing to urself.
Really? WOW!! How insightful. Labor costs nothing if you do it yourself! Didn't know that. Thanks for opening our eyes.
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Old 05-19-2019, 04:59 AM
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W211 E320 CDI Sportpackage With Carlsson CD32 Chip 2004
Originally Posted by rustybear3 View Post
Really? WOW!! How insightful. Labor costs nothing if you do it yourself! Didn't know that. Thanks for opening our eyes.
Don't try to be a hero.
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