12v battery warranty
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Junior Member
Joined: Jan 2017
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C Class 2016
12v battery warranty
Hello folks,
My 4 year warranty is expiring in a month and I keep getting the “critical battery charge” message for the 12v starter battery. Please do you know if this battery is covered by the 4 year warranty?
Appreciate all the help
My 4 year warranty is expiring in a month and I keep getting the “critical battery charge” message for the 12v starter battery. Please do you know if this battery is covered by the 4 year warranty?
Appreciate all the help
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Joined: May 2018
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From: Long Island, NY
2019 E 450, 2016 E350 4matic (retired), 2018 Ford Edge Sport, 2008 Porsche Boxster
To the best of my knowledge batteries are pro rated and the replacement cost is not covered under either the 4 year/50,000 miles warranty
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Junior Member
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C Class 2016
Thank you for the answer. I have been charging the battery by just driving the car for about 45min. That solves the problem for a week or two but then the problem comes back. I wonder if the battery is too old to hold the charge and needs to be replaced at this point.
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From: Northern Germany and sometimes Southern Germany
Mercedes E220d AMG Line Estate (S213) and Mercedes E220d AMG Line Cabriolet (A238)
Sadly that’s normal after two weeks of not using. Have you put the car in Standby/Hibernate mode using the command system?
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From: Long Island, New York
2018 E400 4matic Wagon
I would call the dealer and explain your situation. Sounds like you have a weak battery.
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Thread Starter
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C Class 2016
Thanks everyone for the info. I didn’t have a chance to take the car to the dealer and now the warranty is expired. I assume the dealer would have recognized a prorated warranty only anyways… who knows. So I still have the message coming up every now and then. What is the worst that could happen? The car just won’t start at all, right? Or is the worst that only certain features are limited? Appreciate the help.
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From: Northern CA
2020 E450 4MATIC
Thanks everyone for the info. I didn’t have a chance to take the car to the dealer and now the warranty is expired. I assume the dealer would have recognized a prorated warranty only anyways… who knows. So I still have the message coming up every now and then. What is the worst that could happen? The car just won’t start at all, right? Or is the worst that only certain features are limited? Appreciate the help.
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Thread Starter
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C Class 2016
At this late stage, any prorated adjustment would only be just a couple of dollars anyways. This message could be due to limited amount of driving you do; in my case I would get the same message almost every ten days if I didn't hook up a battery charger/maintainer to it since mine is not driven every day. I would suggest carrying a battery starter/jumper in the trunk just in case, so you don't get stranded at a bad time/place.
Last edited by zz2017; Jan 16, 2023 at 08:37 PM.
Junior Member
Joined: Jan 2023
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From: Northern CA
2020 E450 4MATIC
Thank you so much. Your suggestion on the battery starter is great. Do you know of any particular model that works well with Mercedes batteries? Or should all of them be the same thing? Maybe something like this should work? Starter on amazon
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C Class 2016
I just picked one from Amazon with lots of good reviews/comments (around $100), I had done some literature review on different models before picking one and I think any of them with high ratings should work fine with any V4 or V6 MB. They usually keep their charges for 6 months and on the average can jump start a dead battery 4 times on a full charge before completely draining.
Junior Member
Joined: Jan 2023
Posts: 52
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From: Northern CA
2020 E450 4MATIC
Thank you again! Ordered one already and it is arriving overnight. So just to confirm, if at some point the car won’t start, just connect the jumper to the main battery, jump start the car (seems pretty easy according to some YouTube videos) and replace the starter battery asap ?
In a nutshell, yes. However, make sure to read the instructions, some starters won't function if they don't detect "any" voltage back from the dead battery (i.e. fully dead), and need to follow an override procedure to get them work, it may seem complicated, but it is not, depending on the specific model, could be as easy as pushing a button on the side or bottom of the device.
Thread Starter
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C Class 2016
Sure.
In a nutshell, yes. However, make sure to read the instructions, some starters won't function if they don't detect "any" voltage back from the dead battery (i.e. fully dead), and need to follow an override procedure to get them work, it may seem complicated, but it is not, depending on the specific model, could be as easy as pushing a button on the side or bottom of the device.
In a nutshell, yes. However, make sure to read the instructions, some starters won't function if they don't detect "any" voltage back from the dead battery (i.e. fully dead), and need to follow an override procedure to get them work, it may seem complicated, but it is not, depending on the specific model, could be as easy as pushing a button on the side or bottom of the device.
