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E-Class (W211) 2003-2009

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Old 01-28-2011, 02:26 AM   #26
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Quote:
Originally Posted by fbsdmd View Post
The OE auxiliary battery for 2003-2006 models is 211 541 00 01 and MSRP is $187.
That part number is not for the auxiliary battery, it is for the rear battery.[/quote]

No! FBSDMD did provide the correct part# for the aux.

The main battery part# is A005 541 10 01
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Old 01-28-2011, 02:35 AM   #27
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Clinton_Horn, I am not sure your first point is entirely accurate "1. The small battery in the engine bay is a backup that supplies energy ONLY to the hydraulic brake servo motor. It will not crank the car, run lights etc. This is to insure that braking power is maintained during a failure of the main battery." as when I was having my red light warning issues, every once in a while the red warning light was replaced with a message that stated "some of my accessaries may not be functional 9sic)", which seemed to imply more than just the brakes. However, the manual did also say to be prepared for brake issues (so yes the brakes must be in the mix too)?
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Old 01-29-2011, 11:30 AM   #28
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Originally Posted by Still_Waters_43 View Post
That part number is not for the auxiliary battery, it is for the rear battery.
No! FBSDMD did provide the correct part# for the aux.

The main battery part# is A005 541 10 01[/quote]

To add to the confusion of this subject, following is the listing from the GetMercedesParts.com catalog:


Mechanical Catalog Item Number MSRP Core Price Price 2115410001 $187.00 $0.00 $140.25 Electrical - Chassis electrical - Battery - Battery
Battery, e55, front 2003 - 2006
Add to Cart Contact Us 2115410001 $187.00 $0.00 $140.25 Electrical - Chassis electrical - Battery - Battery
Battery, e320, e320 cdi, e350, e500, front 2003 - 2006
Add to Cart Contact Us Collision Catalog Item Number MSRP Core Price Price 2115410001 $187.00 $0.00 $140.25 Electrical - Battery - Battery - Rear
Rear 2003 - 2009
Add to Cart Contact Us
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Old 01-30-2011, 08:14 AM   #29
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I think you are mostly right, however...

on point 3, I think you are wrong. Here is why. After I did the fuse block jumper position change (so that the cigar lighter is live at all times, allowing you to Battey Tender charge the main battery from the cigar lighter), I needed to get at the aux battery to put a seconf battery maintainer on it (winter storage). Out of curiosity (because I was not 100% sure that the one Battery Tender was not already charging the aux battery), I pulled the ground lead off the aux battery and put a voltmeter accross its two cables (so I was not reading the battery's voltage, but what was going into it). I read 0 volts.

At least with ignition off, the aux battery is getting no voltage. Now, I did not read across a chassis ground, so if MB did something really screwy and did not have the negative lead connected to chassis ground, the test does not disprove your point. This would be the first time I have ever seen a battery negative cable not grounded to chassis ground, however. On the other hand, this is MB and almost anything is possable.

- nopcbs


Quote:
Originally Posted by Clinton Horn View Post
I try to differentiate between what I know and what I have heard. People on this board have described the system briefly as this:
1. The small battery in the engine bay is a backup that supplies energy ONLY to the hydraulic brake servo motor. It will not crank the car, run lights etc. This is to insure that braking power is maintained during a failure of the main battery.
2. The small battery is charged on a timed schedule for a brief period to keep it hot. This is controlled by the BCM (battery control module).
3. There is an electrical circuit that limits current in one direction, ie the main battery will energize the positive lead in the small battery compartment, even when disconnected from the small battery. When replacing the small battery, either disconnect the main OR carefully isolate the small battery + lead so IT DOES NOT touch any part of the car.
4. AS I understand it, the small battery does not energize the main electrical system so the reverse (charging the main battery + lead from the small battery) is not a problem.

I must admit that W211 has the most complicated and delicate electrical system that I have run into. I speculate that more than half of the comments and questions on this forum are related to electrical system (specifically charging/ battery) problems.

Even though though the small battery is out of the main system loop, a failure will post the same "electrical consumers" message so one cannot be sure which, if either battery is failing.

I would not hesitate to encourage anyone with moderate skills and tools to attempt this. Just be aware that grounding the charging system or other mis steps can consume several times the savings and satisfaction one gains form DIY
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Old 01-30-2011, 08:29 AM   #30
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Hmmm

No kidding, same PN and price for aux and rear battery? Nice (the price) if true, but I don't think so.

I'd definitely do the "call us" before ordering.

It is kind of in keeping with the complexity of these cars.

- nopcbs

Quote:
Originally Posted by fbsdmd View Post
No! FBSDMD did provide the correct part# for the aux.

The main battery part# is A005 541 10 01
To add to the confusion of this subject, following is the listing from the GetMercedesParts.com catalog:


Mechanical Catalog Item Number MSRP Core Price Price 2115410001 $187.00 $0.00 $140.25 Electrical - Chassis electrical - Battery - Battery
Battery, e55, front 2003 - 2006
Add to Cart Contact Us 2115410001 $187.00 $0.00 $140.25 Electrical - Chassis electrical - Battery - Battery
Battery, e320, e320 cdi, e350, e500, front 2003 - 2006
Add to Cart Contact Us Collision Catalog Item Number MSRP Core Price Price 2115410001 $187.00 $0.00 $140.25 Electrical - Battery - Battery - Rear
Rear 2003 - 2009
Add to Cart Contact Us[/quote]
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Old 01-30-2011, 09:59 AM   #31
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When the main battery fails, the car is DEAD. It will not unlock, accept the ignition key, no interior lights, no audio, trunk release, parking lights, emergency flashers etc. The clock looses its way. If the Aux battery provides backup for any of these functions, it is news to me. I dont think I had to reprogram the radio stations so that must be it!

I can also let you know that IF you ground the positive lead of the AUX battery to the frame of the car, you will get a short and damage to the electrical system is possible. That can only mean there is a feed thru from the main battery to the aux pos lead. This is not hearsay or things I have read. These are life experiences.

I have seen the " consumr devices etc" code thrown in my car when either battery was failing. As far as I am concerned that message and the red battery warning are interchangeable except that the red battery means you are going to be walking sooner.
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Old 01-30-2011, 12:58 PM   #32
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Go try it...

...,it being disconnect the ground cable on the aux battery and then measure the voltage accross + of battery and that (disconnected) ground cable. Nothing there. I did this last year. This with ignition in off position.

If what you are saying is true, then you can charge the aux battery at the same time that you charge the main...and you can't. Separate circuits.

- nopcbs

Quote:
Originally Posted by Clinton Horn View Post
When the main battery fails, the car is DEAD. It will not unlock, accept the ignition key, no interior lights, no audio, trunk release, parking lights, emergency flashers etc. The clock looses its way. If the Aux battery provides backup for any of these functions, it is news to me. I dont think I had to reprogram the radio stations so that must be it!

I can also let you know that IF you ground the positive lead of the AUX battery to the frame of the car, you will get a short and damage to the electrical system is possible. That can only mean there is a feed thru from the main battery to the aux pos lead. This is not hearsay or things I have read. These are life experiences.

I have seen the " consumr devices etc" code thrown in my car when either battery was failing. As far as I am concerned that message and the red battery warning are interchangeable except that the red battery means you are going to be walking sooner.
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Old 01-30-2011, 08:56 PM   #33
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Originally Posted by nopcbs View Post
on point 3, I think you are wrong. Here is why. After I did the fuse block jumper position change (so that the cigar lighter is live at all times, allowing you to Battey Tender charge the main battery from the cigar lighter), I needed to get at the aux battery to put a seconf battery maintainer on it (winter storage). Out of curiosity (because I was not 100% sure that the one Battery Tender was not already charging the aux battery), I pulled the ground lead off the aux battery and put a voltmeter accross its two cables (so I was not reading the battery's voltage, but what was going into it). I read 0 volts.

At least with ignition off, the aux battery is getting no voltage. Now, I did not read across a chassis ground, so if MB did something really screwy and did not have the negative lead connected to chassis ground, the test does not disprove your point. This would be the first time I have ever seen a battery negative cable not grounded to chassis ground, however. On the other hand, this is MB and almost anything is possable.

- nopcbs
I also believe point 3 is wrong. When I disconnected the aux battery I was very careful to isolate the pos lead from everything but I also checked it with my multi meter and found no voltage pos lead to neg lead or pos lead to chassis ground. This is with the ignition turned off and key removed.
I did not repeat the test with the key in the ignition in any position so have no comment on that.
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Old 01-30-2011, 11:40 PM   #34
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apparently the Russians have no fear of copywrite infringement. I believe this will clear up some of the questions here including my erroneous statement that the Aux battery was never used to backup other systems. My apologies. I was WRONG


http://www.mbclub.ru/pdf/219%20HO%20...2011-29-02.pdf

Last edited by Clinton Horn; 01-30-2011 at 11:47 PM. Reason: New URL, delete broken link
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Old 01-30-2011, 11:59 PM   #35
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Go Ivan!

To whoever posted that at the Russian web site...Thank You! This is what I call international cooperation.

It also meams that if you get the infamous "convenience features turned off" messge, it means your main battery is going south. That's a $170+ bummer.

- nopcbs

Quote:
Originally Posted by Clinton Horn View Post
apparently the Russians have no fear of copywrite infringement. I believe this will clear up some of the questions here including my erroneous statement that the Aux battery was never used to backup other systems. My apologies. I was WRONG


http://www.mbclub.ru/pdf/219%20HO%20...2011-29-02.pdf
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Old 01-31-2011, 03:48 AM   #36
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Originally Posted by nopcbs View Post
It also meams that if you get the infamous "convenience features turned off" messge, it means your main battery is going south. - nopcbs
My messages were alternating between the "red battery..." and the "convenience..." and my problem was the aux
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Old 01-31-2011, 10:23 AM   #37
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Quote:
Originally Posted by Clinton Horn View Post
apparently the Russians have no fear of copywrite infringement. I believe this will clear up some of the questions here including my erroneous statement that the Aux battery was never used to backup other systems. My apologies. I was WRONG


http://www.mbclub.ru/pdf/219%20HO%20Dual%20Battery%20(ACB%20-%20ICC)%2011-29-02.pdf
Any chance the usage of the auxiliary battery was modified between 2002 (the .pdf date) and 2006?
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Old 01-31-2011, 09:14 PM   #38
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[QUOTE=lkchris;4484905]The OE main battery (USA) for diesels is part number 005 541 10 01 and MSRP is $253.

The OE auxiliary battery for 2003-2006 models is 211 541 00 01 and MSRP is $187.

https://www.getmercedesparts.com/oem...des-parts.html

Kent - MB Oakland just quoted $400 for R500 new battery installed, and the above link doesn't seem to carry. Do you know anythign about that?
thx.
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Old 02-03-2011, 10:18 AM   #39
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Just back from the dealer-battery/charging system diagnosis was $110. Surprise, it needs a new main battery. $310 more for that. My local mechanic says he'll put it in if I can get it.
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Old 02-03-2011, 07:39 PM   #40
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Ok, now as Paul Harvey used to say, here is the rest of the story. I called GetMercedesParts to confirm the battery part number and to order one, and they told me they couldn't ship it with acid in it, that I'd have to get it dry and find acid somewhere. They did say I could pop over to Michigan and pick one up. I called the dealer back and had them install the main battery for a total cost of $422. The vision of a totally dead E350 on a -10 F day was too much. I am now trying to find an auxiliary battery. I gave my mechanic the numbers mentioned above, and he has found the right shape, but can't confirm it is an AGM battery. According to the dealer, when they tested my car, the auxiliary battery tested ok, but it is 6 years old and could go any day. What is that in dog years?
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Old 08-01-2011, 02:37 PM   #41
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FYI
This morning the car was totally dead (haven't touched it for 2 days). The battery is an original so it is almost 8 years old. Roadside assistance charged me $253 +tax for the new OEM one.
And that is in Boston metro area
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Old 08-01-2011, 03:51 PM   #42
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Sounds like a bargain to me. As mentioned above, I paid $310 for the battery and $110 for the diagnosis. I would guess that you didn't have to pay for the diagnosis from roadside assistance. I still haven't changed my auxiliary battery. I found an identical motorcycle AGM battery, and will put it in before winter.
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Old 08-01-2011, 04:59 PM   #43
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All the labor (including testing) from the roadside assistance is free. The price for aux battery is a bit too steep ($170).
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Old 08-01-2011, 09:30 PM   #44
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Quote:
Originally Posted by lkchris View Post
The OE main battery (USA) for diesels is part number 005 541 10 01 and MSRP is $253.

The OE auxiliary battery for 2003-2006 models is 211 541 00 01 and MSRP is $187.

https://www.getmercedesparts.com/oem...des-parts.html
[/url]

I tried getting an auxiliary battery from Mercedes-Benz of Annapolis.They were unable to ship it. Because it's considered a "hazardous item".
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Old 08-01-2011, 09:41 PM   #45
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Just checked parts.com
$134.40 for aux batt and I presume they'll ship it w/o hesitation
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Old 08-01-2011, 10:40 PM   #46
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Just checked parts.com
$134.40 for aux batt and I presume they'll ship it w/o hesitation
I just went to parts.com, and the the price I found for the 2006 E350 front battery was $211. Because the E350 with the brake-by-wire system is so complicated, I am not comfortable with changing it myself, so there would be a labor charge of some sort. I would certainly want to confirm that the battery is an AGM battery. It seems obvious that the rear battery they are selling is not an AGM battery. The rear battery is under two levels of trunk floor, and if you aren't using an AGM battery, the area where it sits needs to be vented to the outside. This introduces a level of complexity. As mentioned, I found an AGM auxiliary battery that is used in a motorcycle that appears to be identical to the MeBe battery, and it was less than $100.00. My understanding is that the auxiliary battery lives to keep the brake system functioning in the event of main battery failure. I think I'm a little concerned about making sure I have the right auxiliary battery. In particular, the terminals/attachments would need to be exactly receptive to the MeBe wires, or the attachment of the wires to the would have to be jury-rigged. Quarters are tight where the auxiliary battery goes, and hook up may not be as easy as it looks. Additionally, the SBC pump/computer has an extended warranty. It is quite possible that use of a non-OEM battery could void the warranty. That is one pricey assembly.
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Old 08-01-2011, 10:48 PM   #47
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From parts.com searched by p/n

Item Number MSRP Core Price Price
2115410001 $187.00 $0.00 $134.40
Electrical - Chassis electrical - Battery
Battery, e320, e320 cdi, e350, e500, front 2003 - 2006
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Old 08-01-2011, 11:06 PM   #48
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Nonsense!

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Originally Posted by Benzcowboy View Post
I tried getting an auxiliary battery from Mercedes-Benz of Annapolis.They were unable to ship it. Because it's considered a "hazardous item".
The front battery is an AGM type and spill-proof. In any case, the electrolyte is shipped in a separate container and you fill the battery prior to use. I bought one on ebay for about $70 not long ago. Turned out I did not yet need it. It sits, un-charged with electrolyte, in my work shop. Infinite shelf life that way.

- nopcbs
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Old 08-01-2011, 11:12 PM   #49
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AGM rear battery at Auto Barn is $185 delivered.

http://www.autobarn.net/eas9agm49.html

They periodically go out of stock, so get it while you can.

- nopcbs
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Old 08-01-2011, 11:25 PM   #50
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Originally Posted by maxi13 View Post
From parts.com searched by p/n

Item Number MSRP Core Price Price
2115410001 $187.00 $0.00 $134.40
Electrical - Chassis electrical - Battery
Battery, e320, e320 cdi, e350, e500, front 2003 - 2006
I must be doing something wrong - this is all I get from Parts.com:

Click the image to open in full size. Click the image to open in full size. 2006 Mercedes-Benz E Class Sedan Items(s) displayed below Electrical, Battery, Battery Front
Dealer Price Core Price Savings Final Price
$294.00 N/A $82.80 $211.20
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Old 08-01-2011, 11:25 PM
 
 
 
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