View Full Version : Replacement Battery

08-09-2012, 05:25 PM
My battery is over three years old so, as a precaution, I decided to replace it today with a Mercedes battery. The epc calls for the shorter battery (005 541 25 01) for both the E420 and the 500E. I remember my old 400E had the longer Mercedes battery (000 982 33 08). This longer battery is still specified on the W126 chassis but I couldn't find any application for the W124's. It was about 3 inches longer. The epc now calls for the shorter battery on the 400E as well. Mysteriously, the mount on the tray in my E420 fit perfectly for the longer battery's length. Any idea why they changed to the shorter battery? I paid $157 for the longer one, so I can't imagine the shorter battery would be that much less. They are both 100AH.

08-09-2012, 05:38 PM
Here are my notes from a post in early 2008 regarding the OE Mercedes batteries from the dealership. I did not check into the current EPC part number but if it is showing a smaller/shorter battery, that is an error. The battery must be long enough to properly fit in the hold-down bracket.

Also - many batteries will last a long time if cared for properly. I have some MB lead-acid batteries that went over 10 years before the starter RPM's started to drop noticeably. The AGM's may last even longer. I am using a PuselTech Power Pulse (http://www.pulsetech.net/PP12L-PowerPulse-12Volt-Battery-Maintenance-System-7291.aspx) unit ($32 at Amazon) on most of my batteries, which helps extend their life, and I use trickle chargers when the cars will be parked for more than a couple of weeks.

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004-541-03-01 is a standard lead-acid battery, list $115 (similar to Interstate MT-93)
004-541-45-01 is a silver-calcium lead-acid battery, list $165 (similar to Interstate MTP-93)
004-541-46-01 is an "AGM" (gel-cell) type sealed battery, list $210

The 400E/500E use the same battery as the W124 diesels, btw, with a 100Ah rating (compared to the 75Ah rating for the gasser/6-cyl W124's). Oddly, the EPC specifices the 004-541-03-01 for USA models, but for Euro models, it specifies 004-541-46-01! Go figure. The 004-541-46-01 is specified for a zillion different models in Europe, including chassis 107, 115, 116, 123, 124, 126, 129, 140, 201, etc...

While at the local dealer today, I inquired about the current OE batteries available. It turns out that all three of the part numbers mentioned above have been superceded to 000000-002697, which is a silver-calcium type:

004-541-03-01 rolls to 000000-002697 (this would be an 'upgrade')
004-541-45-01 rolls to 000000-002697 (straight roll to similar type)
004-541-46-01 rolls to 000000-002697 (this would be a 'downgrade', which doesn't make sense!)

Anyway, they also had a AGM / gel-cell battery available, in a black casing. This is part # 005-541-10-01. So, at the moment, your two choices for the "large" battery used on most MB diesels and V8/V12's are:

000000-002697 - silver-calcium lead-acid battery, white, 100Ah, 760A, list $135
005-541-10-01 - "AGM" (gel-cell) type sealed battery, black, 95Ah, 850A, list $253 (!!)

08-09-2012, 09:52 PM
Thanks for the info. That is weird. I don't even know for sure what battery I have now in my E420. It's a 000 982 33 08. I have petty much had to change my factory batteries out about every 3 years. Maybe it's because of the heat out here and the fact that the high speed fans and a/c blower are used more. I don't know


I rechecked the epc using a friend's VIN for his 500E. It is showing 005 541 25 01, which is the short battery--the same one that my E420 calls for. Maybe it's just a mistake.

08-10-2012, 09:31 AM
AGM +1000.

You can get a Deka/Remy for about 185 shipped last I checked for Group 49 850A. They are all I run these days, HEAVY as they may be..


08-14-2012, 04:51 PM
I was at the dealer today and asked about the batteries. Apparently MB likes to change part numbers on the lead-acid batteries quite frequently. The latest number for the silver-calcium style lead-acid appears to be 000-982-33-08, replacing the older 004-541-45-01 and 000000-002697.

The part number for the AGM is still 005-541-10-01.

Both are the "long" batteries that properly fill the tray in the 400E/500E. I don't think the shorter battery will work right, the retaining clamp may not hold it in place. If so - it would be an EPC error.


08-17-2012, 02:29 AM
In my case, it's a fait accompli -- I already got the longer battery, even though the epc calls for the shorter one for my E420. I think you are right -- the epc is in error. The PO had a nylon tie-down strap that was held in position by the retaining clamp. I don't know if it was something Mercedes made or whether it was a makeshift piece. When I replaced the battery three years ago, I got the shorter one because that's what came out and that's what the dealer gave me, based on their epc. I just figured for roughly the same price the larger battery was a better buy. I should have bought the AGM.

08-17-2012, 08:50 AM
The flat nylon strap is factory equipment on the .034 but I'm not sure why it wasn't used on the .036 chassis. You were smart to go for the larger/correct battery. The AGM would have been nice but it's a LOT more expensive... around $250 list at the dealer, ouch. Jono likes the Deka/Remy but I haven't tried one yet.

UPDATE Jan-2013: (copy/paste from this thread (http://www.500eboard.com/forums/showthread.php?3717-alternator-or-battery)):

Although I like Interestate, I've not had the best luck with them over the past ~5 years or so. I'm also not sure if they offer a Group 49 AGM.

I would recommend an AGM battery for their superior performance and extended lifespan compared to the typical flooded type battery. AGM's are coming down in price now, although the OE Mercedes AGM is still stupidly expensive (MSRP is now over $300, I think). Die Hard and Duralast now offer a Group 49 AGM for $160 and $180, respectively, and the Die Hard goes on sale for 10% off periodically making them basically equal in price. Sears has a 20% discount occasionally if you're patient enough:

DieHard AGM:

Duralast AGM:

Deka is around $180 (approx) if available locally where you live, otherwise they are ~$225 with shipping. NAPA AGM is $230, CarQuest AGM is $200. If cost were no object I'd love a Braille (click here (http://www.tirerack.com/accessories/detail.jsp?ID=118)) but those are ~$280 shipped!! I need to get a battery in the near future for one of my cars and it will be either the DieHard or the Duralast AGM. It's not clear if there is any warranty beyond the 3-year free replacement, although usually by year 4 or 5, the pro-rated warranties are nearly useless anyway.


08-17-2012, 01:10 PM
This was for my 124.034 (E420), so I guess the tie down strap was standard. When I removed the strap, the longer battery fit nicely in the tray and was perfectly secured by the retaining clamp, even though the epc calls for the shorter battery for my car.

09-03-2012, 07:09 PM
Shortly after installing this new battery from the dealer, I noticed that the starter turned markedly slower on engine start. I didn't give it much thought until today, when I measured the voltage of the battery at 10.4 volts. If my battery light does not illuminate, is it safe to assume that the alternator is working okay and it is a defective battery? When I measure the voltage across the battery with the engine running it is 14 volts.

Is there a way to verify the battery is bad? Thanks again guys. This should probably go in the category of "If it's not broke, don't fix it." The previous battery was fine.

09-03-2012, 07:32 PM
Sounds like you got a bunk battery from the dealer. I'd return it (should have a one-year warranty) for a replacement. 10.4 volts is WAY low.

It should be around 12-12.5+ at the very lowest.

09-03-2012, 07:43 PM
Thanks, Gerry. When I installed it I measured 10.5 volts too, but just attributed that to voltage lost during storage of the battery at the dealer. I'll take it back tomorrow.

09-03-2012, 07:48 PM
Any battery should be fully charged when it is delivered to the customer. Generally batteries are stored and will hold a charge for a while, so the 10.5 at purchase should have been a warning. Batteries are common enough turnover items that they really shouldn't ever sit around a dealer (or battery shop) for more than a few months, and should be checked periodically when being stored.


09-03-2012, 08:04 PM
The dealer has been pretty good about standing behind their products, so hopefully it should not be a problem. Thanks again for the quick reply.

12-17-2012, 07:25 AM
Did you ever get proper resolution on this? Everything living happily ever after now, battery-wise?

05-05-2013, 08:48 PM
When it comes to those bleak moments of battery replacement issues & challenges, just remember some car somewhere has it much worse. Today I changed out the batteries of the 1991 V12 Dinan 850i BMW Shark (http://www.500eboard.com/forums/showthread.php?843-OWNER-–-DerFuror&p=8499&viewfull=1#post8499). Yes, batteries. The car takes 2 MTP-93 style batteries; one shoehorned into each rear fender well.

Trunk floor liner & both fender well liners must be removed. The CD changer unit & its mounting bracket must be removed to gain access to the passenger side battery. The jack & some strange metal bracket of unidentifiable purpose must be removed to gain access to the driver side battery.

Interestingly, the battery tray is adjustably designed to accommodate either the long or shorter-length battery styles. Ground cables connect to a common grounding location on the driver side.

I’ve now secured the basic maintenance “contract” on the Shark. The sad ("professional") bast*rd that last attempted battery work failed proper battery disconnecting procedure, touched off a 13mm wrench across passenger side positive post & body sheet metal which sent the wrench rocketing off thu a shop window leaving only stunned looks of shock and awe along with blastmark evidence & the fleeting smell of its ozone vapor trail.

05-06-2013, 02:16 AM
Did you ever get proper resolution on this? Everything living happily ever after now, battery-wise?

Sorry I missed your question from five months ago, Gerry. Yes, the dealer exchanged the battery for a new one. They think one of the cells was bad. Everything has been fine with the electrics ever since.

DerFuror's post above makes me feel grateful I don't have to deal with a BMW. I've never worked on one but I hear they are not quite as mechanic-friendly as the W124, although I have to admit that I can empathize with the guy who touched the 13 mm wrench from the positive to the battery well. That'll get your attention, post-haste.

05-06-2013, 08:07 AM
Forgot to post this previously:

For future reference, detailed battery info has been added as a Wiki entry at this link:

http://www.500eboard.com/forums/showwiki.php?title=Group_49_battery_information_fo r_400E_500E


05-06-2013, 08:19 AM

I may just be lucky but 8-1/2 years ago when I bought my car it came with a brand new Interstate battery. Two weeks ago I just replaced it with another one just like it.

The only issue with it was having to run an 1/8" plastic tube to vent it out of the car.

Price was $156.00 w/ a 72 month warranty which I happily paid.

05-09-2017, 10:26 AM
Hi, I just replaced the battery on my 94, got a sale at Pep Boys on Bosch group 49... Can't believe how fast the starter spins now, guess my old one was not providing enough current although the voltage was fine.

Question, I could not find a vent tube on my car, nor could I spot a location where the tube might have been. I removed the inner panel to get a good look. Did I miss something?