- Mercedes-Benz E-Class: Warning Lights
Important information to help you understand your Mercedes-Benz
Red battery message ( Visit workshop)
I say, "Can I just change out the battery my self?"
He says no. QUOTE]

I guess what he really meant it is so complicated you should have your wife change it out while you hold the flashlight.

I changed mine out while my wife held the light. Warning though Don't let the + cable touch ground unless you disconnect the main bat. in the trunk.
I had the wife hold it for me (+ cable)
while I installed the battery.
I also searched for the sears battery Sears DieHard Gold 14-BS AGM and found it, but it was not 69.00; it was $87 plus tax and core.
One other question. With the sears battery, I had to fill it with acid and then wait 30 min and then put the permanant cap on it. Then it says I have to charge the battery for 2hrs, before using it.
Is this correct???
So with all these AGM batteries you have to fill with acid and charge before use???
Thanks.
This is what I found. Borrowed from someone who did the research.
" Major Battery Types
Batteries are divided in two ways, by application (what they are used for) and construction (how they are built). The major applications are automotive, marine, and deep-cycle. Deep-cycle includes solar electric (PV), backup power, and RV and boat "house" batteries. The major construction types are flooded (wet), gelled, and AGM (Absorbed Glass Mat). AGM batteries are also sometimes called "starved electrolyte" or "dry", because the fiberglass mat is only 95% saturated with Sulfuric acid and there is no excess liquid.
Flooded may be standard, with removable caps, or the so-called "maintenance free" (that means they are designed to die one week after the warranty runs out). All gelled are sealed and are "valve regulated", which means that a tiny valve keeps a slight positive pressure. Nearly all AGM batteries are sealed valve regulated (commonly referred to as "VRLA" - Valve Regulated Lead-Acid). Most valve regulated are under some pressure - 1 to 4 psi at sea level"
Autozone GTX 14-BX FG AGM battery this should be the exact replacement for $69.99
Walmart everstart Maxx 14-BS AGM
Interstate CYTX 14-BS (at local firestone)
Delco GTX 14-BS
Napa 740-1866?? Not sure if # is correct
Yacht CTX12-BS ETX-12/12BS
Sears CB12C-A
Yuasa YB12AL-A2
Possible just 14-BS will work.
Battery dimensions
WxDxH 6”x3 ¼”+ x 6”
Note + Terminal is on right side when looking at the back side of the battery.
In addition to auxiliary battery replacement:
Have your dealer check VMI (Vehicle Master Inquiry - have your VIN handy) to see if there are any outstanding recalls or service campaigns all are covered by MBUSA even out of warranty.
Surely you can find one of these. Even Harley Davison has a battery that will work. But if you can't find one,, the Dealer will have one for about $146.
Last edited by vettdvr; Mar 30, 2009 at 06:13 PM.
I just bought a Everstart MAXX ES14BS motorcyle battery from Wal-Mart ($65) yesterday. I had to add the sulfuric acid before charging for 2-4 hours. On the box and in the documentation it states that it is a AGM battery.
You can see the acid in the white bottle. Once you fill with acid and let stand, cover the fill holes with the permanant cap then charge, it will be maintainance free for the life of the battery. As vettdvr said: he opened the caps up and could see acid in them.
As someone else wrote: the acid is instilled into the battery and then absorbed by the fiberglass. So my guess is that once I instill acid it will absorb into the fiberglass and activate the battery.
Any thoughts?
This is what I found. Borrowed from someone who did the research.
" Major Battery Types
Batteries are divided in two ways, by application (what they are used for) and construction (how they are built). The major applications are automotive, marine, and deep-cycle. Deep-cycle includes solar electric (PV), backup power, and RV and boat "house" batteries. The major construction types are flooded (wet), gelled, and AGM (Absorbed Glass Mat). AGM batteries are also sometimes called "starved electrolyte" or "dry", because the fiberglass mat is only 95% saturated with Sulfuric acid and there is no excess liquid.
Flooded may be standard, with removable caps, or the so-called "maintenance free" (that means they are designed to die one week after the warranty runs out). All gelled are sealed and are "valve regulated", which means that a tiny valve keeps a slight positive pressure. Nearly all AGM batteries are sealed valve regulated (commonly referred to as "VRLA" - Valve Regulated Lead-Acid). Most valve regulated are under some pressure - 1 to 4 psi at sea level"
Autozone GTX 14-BX FG AGM battery this should be the exact replacement for $69.99
Walmart everstart Maxx 14-BS AGM
Interstate CYTX 14-BS (at local firestone)
Delco GTX 14-BS
Napa 740-1866?? Not sure if # is correct
Yacht CTX12-BS ETX-12/12BS
Sears CB12C-A
Yuasa YB12AL-A2
Possible just 14-BS will work.
Battery dimensions
WxDxH 6”x3 ¼”+ x 6”
Note + Terminal is on right side when looking at the back side of the battery.
In addition to auxiliary battery replacement:
Have your dealer check VMI (Vehicle Master Inquiry - have your VIN handy) to see if there are any outstanding recalls or service campaigns all are covered by MBUSA even out of warranty.
Surely you can find one of these. Even Harley Davison has a battery that will work. But if you can't find one,, the Dealer will have one for about $146.
Yeah I know you got the Autozone GTX 14-BX FG AGM battery, at autozone. And I insisted that you bought it there and the manager says he cannot find it anywhere in his computer system. He called is district manager and that guy said he could not find it either. They suggested I look online and give them a part number other than the above or to just order it online.
I could not find it on the autozone website. Anyone else find it on the website?
It has been very frustrating b/c it sounds so easy, but I keep running into problems.
There are no walmarts in my area.
The Best of Mercedes & AMG
This is what I found. Borrowed from someone who did the research.
" Major Battery Types
Batteries are divided in two ways, by application (what they are used for) and construction (how they are built). The major applications are automotive, marine, and deep-cycle. Deep-cycle includes solar electric (PV), backup power, and RV and boat "house" batteries. The major construction types are flooded (wet), gelled, and AGM (Absorbed Glass Mat). AGM batteries are also sometimes called "starved electrolyte" or "dry", because the fiberglass mat is only 95% saturated with Sulfuric acid and there is no excess liquid.
Flooded may be standard, with removable caps, or the so-called "maintenance free" (that means they are designed to die one week after the warranty runs out). All gelled are sealed and are "valve regulated", which means that a tiny valve keeps a slight positive pressure. Nearly all AGM batteries are sealed valve regulated (commonly referred to as "VRLA" - Valve Regulated Lead-Acid). Most valve regulated are under some pressure - 1 to 4 psi at sea level"
Autozone GTX 14-BX FG AGM battery this should be the exact replacement for $69.99
Walmart everstart Maxx 14-BS AGM
Interstate CYTX 14-BS (at local firestone)
Delco GTX 14-BS
Napa 740-1866?? Not sure if # is correct
Yacht CTX12-BS ETX-12/12BS
Sears CB12C-A
Yuasa YB12AL-A2
Possible just 14-BS will work.
Battery dimensions
WxDxH 6”x3 ¼”+ x 6”
Note + Terminal is on right side when looking at the back side of the battery.
In addition to auxiliary battery replacement:
Have your dealer check VMI (Vehicle Master Inquiry - have your VIN handy) to see if there are any outstanding recalls or service campaigns all are covered by MBUSA even out of warranty.
Well I took the car to the dealer and they ran a diagnostic and told me about the battery the faulty SRS light. So I assume they did this for me.
Surely you can find one of these. Even Harley Davison has a battery that will work. But if you can't find one,, the Dealer will have one for about $146.
Yeah I know you got the Autozone GTX 14-BX FG AGM battery, at autozone. And I insisted that you bought it there and the manager says he cannot find it anywhere in his computer system. He called is district manager and that guy said he could not find it either. They suggested I look online and give them a part number other than the above or to just order it online.
I could not find it on the autozone website. Anyone else find it on the website?
It has been very frustrating b/c it sounds so easy, but I keep running into problems.
There are no walmarts in my area.
Okay I'm glad I'm not the only one that had to do this. thanks.
You can see the acid in the white bottle. Once you fill with acid and let stand, cover the fill holes with the permanant cap then charge, it will be maintainance free for the life of the battery. As vettdvr said: he opened the caps up and could see acid in them.
As someone else wrote: the acid is instilled into the battery and then absorbed by the fiberglass. So my guess is that once I instill acid it will absorb into the fiberglass and activate the battery.
Any thoughts?

When I bought the OEM battery it was sealed, no acid adding.
Sears 14-BS is a perfect replacement.
How long before the light goes off?
Will the alternator charge this battery like it does the main battery?
Yes it will charge from the car. You might just drive it a bit to see if it charges.
BUT you also need to have verified your big battery is still good and your alternator is charging. You might have other issues.
Yes it will charge from the car. You might just drive it a bit to see if it charges.
BUT you also need to have verified your big battery is still good and your alternator is charging. You might have other issues.
I don't think it's a bad battery b/c it was inactive until I added the sulfuric acic. So basically it should be a brand new battery.
Did the trickle charger drain my battery? Thats what it seems like.
Hmmm did it hook it up correctly?
Well I just put the positive lead on the charger to the positive lead on the battery and the negative to the negative. Doesn't that seem right?
I'll have to dig up the instructions somewhere.
I hope by driving the alternator will bring it back to 12v.
What is the function of the Aux battery?
Did the trickle charger drain my battery? Thats what it seems like.
Hmmm did it hook it up correctly?
Well I just put the positive lead on the charger to the positive lead on the battery and the negative to the negative. Doesn't that seem right?
I'll have to dig up the instructions somewhere.
I hope by driving the alternator will bring it back to 12v.
What is the function of the Aux battery?
Did you connect the battery correctly. + to the driver side and - to the pass side on the aux bat.?
I will check when I get home.
Will there be any harm to the car if I reversed the leads?
Well I thought I was done with this problem.
I finally got a new aux battery in and all was fine. The warning light went off and everything.
Then a month later the red light with pic of battery went on again!
I checked the aux battery voltage and it reads 12.6v. So it should be fine.
Now what do you think I should do? I'm lost.
Well I thought I was done with this problem.
I finally got a new aux battery in and all was fine. The warning light went off and everything.
Then a month later the red light with pic of battery went on again!
I checked the aux battery voltage and it reads 12.6v. So it should be fine.
Now what do you think I should do? I'm lost.





