My car is brand new , 2023 GLC 300 AWD, just one month old and my app show 12V Battery low. Why is that ? I love my car but I am disappointed that my new car is having battery issues ..
GLC2023 300 AWD 12V low battery
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veena_anchan
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Mine is not a hybrid. There's a class-action lawsuit out of Georgia regarding this. I spoke to the lawyers today. You should submit your information to them so that once this thing is settled, you'll be contacted with the details to determine if you qualify for a settlement. <link below>
I had no idea how widespread this was and have been dealing with this issue 6 months after I purchased it in 2021... So far I've had the battery replaced 3 times and have an appointment to drop my car off on Monday where I know they will replace it again. But it will only last 6-8 months before it too starts to fail. I will also file a complaint with the State Attorney General and anyone else with this issue should do the same. MB is not the same brand that it once was as quality and service have dropped significantly over the past 10-15 years despite the advances in technology and great-looking products. They need to be held to account, otherwise ALL of us will be paying for new batteries every 6-12 months once our warranties have expired.
I also have another unresolved issue that MB claims is normal. The sunshade in the rear does not close completely. There is a 1/4-inch gap that allows sunshine in. The dealer looked at similar models of the same year in their used lot and found it to be the same and deemed it to be normal. I have a claim into MB corporate but nothing has been done to confirm that it was designed this way or not. My issue with it is that I had a Caddy SRX where the sunroof motor failed leaving it wide open and then it started raining on me. My concern is that the motor is defective and may eventually fail. But still after many months, nothing from MB. All the new tech, new body styles, etc., is great, but at the end of the day, that old saying still rings true... "They don't make cars like they used to".
The problem with all 2021 MB models, is that they were built during COVID. Mine was built in 2020. This might explain the sunshade issue, but the charging issue has been going on for much longer from what I discovered here. Other than that, I've been mostly pleased with the car... with a few notable exceptions.
The cost to replace the headlights. $1300 per side.
It wasn't that I couldn't afford it, I'm just not one for allowing people to separate me from my hard-earned money just becuase they can. In less than a month, I was driving a Mercedes , I'm kind of slightly regretting it and now wondering what to buy next if MB doesn't resolve this issue before 2026 when my warranty expires .
Jones et al. v. Mercedes-Benz USA, LLC et al.
Filed: July 1, 2022 ◆§ 1:22-cv-02628
www.lieffcabraser.com
I had no idea how widespread this was and have been dealing with this issue 6 months after I purchased it in 2021... So far I've had the battery replaced 3 times and have an appointment to drop my car off on Monday where I know they will replace it again. But it will only last 6-8 months before it too starts to fail. I will also file a complaint with the State Attorney General and anyone else with this issue should do the same. MB is not the same brand that it once was as quality and service have dropped significantly over the past 10-15 years despite the advances in technology and great-looking products. They need to be held to account, otherwise ALL of us will be paying for new batteries every 6-12 months once our warranties have expired.
I also have another unresolved issue that MB claims is normal. The sunshade in the rear does not close completely. There is a 1/4-inch gap that allows sunshine in. The dealer looked at similar models of the same year in their used lot and found it to be the same and deemed it to be normal. I have a claim into MB corporate but nothing has been done to confirm that it was designed this way or not. My issue with it is that I had a Caddy SRX where the sunroof motor failed leaving it wide open and then it started raining on me. My concern is that the motor is defective and may eventually fail. But still after many months, nothing from MB. All the new tech, new body styles, etc., is great, but at the end of the day, that old saying still rings true... "They don't make cars like they used to".
The problem with all 2021 MB models, is that they were built during COVID. Mine was built in 2020. This might explain the sunshade issue, but the charging issue has been going on for much longer from what I discovered here. Other than that, I've been mostly pleased with the car... with a few notable exceptions.
- Being forced to pay an annual subscription to be able to remotely start your vehicle. (every other car I've owned in the last 15-20 years, including Lincoln, Lexus, Ford, Mercury and Honda had this on the key fob)
- Can't remote start if the tank is less than 1/4
The cost to replace the headlights. $1300 per side.
It wasn't that I couldn't afford it, I'm just not one for allowing people to separate me from my hard-earned money just becuase they can. In less than a month, I was driving a Mercedes
, I'm kind of slightly regretting it and now wondering what to buy next if MB doesn't resolve this issue before 2026 when my warranty expires .Jones et al. v. Mercedes-Benz USA, LLC et al.
Filed: July 1, 2022 ◆§ 1:22-cv-02628
Mercedes Benz Battery Drain Failures – Lieff Cabraser
www.lieffcabraser.com
My 2023 GLC300 (mild hybrid) had the starter battery issue twice. I don’t drive it much. I took delivery 18 months ago and just went over 2,600 miles. When it happened the time, about 4 months ago, the dealership suggested it was due lack of use. They said the car needs to be driven regularly to maintain the charge. in the IT world we call this “blame the user”. I mentioned that I’d never had the problem with any previous car, including the 2022 GLC300. They said the advanced electronics in the 2023 changed things. So I went and drove the car for an hour and that seemed to fix the issue.
Then I got the ”critically low“ message 3 weeks ago. So I drove the car for about an hour and the message disappeared. 2 days later the message came back. I called the dealership and got the same deflection as before. This time they included that if the battery had drained sufficiently one of the cells may have been damaged and the battery may need to be replaced. I brought the car to the dealership. While it was being looked at the advisor came out and ran through the “blame the user” script. He also asked about a code reader that I’d installed in an effort to diagnose the battery problem. He tried to blame the battery drain on it, saying that they constantly read various systems, placing a drain on the battery. I explained that I installed the reader to figure out the battery problem. Having deflected his arguments he left. An hour later he returned. This time there was a different story. Per the advisor, when the car is turned off it runs a check on all of the various systems and then shuts down. In my case it seems this check got stuck in a loop. Something was causing the check to run continuously. This is what was draining the battery, not the lack of driving. He said they performed an update and verified that the check loop ran once and then shut down completely.
That was 2 weeks ago and the message has not appeared since. Schools still out…
Kyle
Then I got the ”critically low“ message 3 weeks ago. So I drove the car for about an hour and the message disappeared. 2 days later the message came back. I called the dealership and got the same deflection as before. This time they included that if the battery had drained sufficiently one of the cells may have been damaged and the battery may need to be replaced. I brought the car to the dealership. While it was being looked at the advisor came out and ran through the “blame the user” script. He also asked about a code reader that I’d installed in an effort to diagnose the battery problem. He tried to blame the battery drain on it, saying that they constantly read various systems, placing a drain on the battery. I explained that I installed the reader to figure out the battery problem. Having deflected his arguments he left. An hour later he returned. This time there was a different story. Per the advisor, when the car is turned off it runs a check on all of the various systems and then shuts down. In my case it seems this check got stuck in a loop. Something was causing the check to run continuously. This is what was draining the battery, not the lack of driving. He said they performed an update and verified that the check loop ran once and then shut down completely.
That was 2 weeks ago and the message has not appeared since. Schools still out…
Kyle
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5 Posts
You're right Kyle, the battery issue isn't from lack of driving. We've received the warning a day after driving an 8 hour trip!
Let's hope you've finally found a cure.
Let's hope you've finally found a cure.
One temporary Band-Aid always lock the car in your garage take the keys put them in the house if you do that it'll shut the computer soft again it's a Band-Aid but I'll stop the battery from going dead. I had the same problem with my car finally got rid of it that seemed to help at least for a week anything longer is I guess
I picked up my 2021 GLC-300 AMG Line from the dealer today, paid for the 40K Mile service, 3rd year of ownership at only 28K Miles $1334 (do I really need to drive a Benz?). They also replaced the battery under warranty AGAIN with no indication of what keeps causing the battery to fail. The service advisor knew better to feed me that same BS about me not driving the car enough, when I drive to work daily (I just have a short commute), but I have their previous comments in writing on the service ticket from the last time they changed the battery saying something like "if the customer doesn't drive the car for at least 10K Mile per year, the battery will begin to fail and this will void the warranty." I asked for it in writing from MB, but never got it. Because they knew that was BS that I would eventually call them out on.
I have one more year under factory warranty and I suspect I will be replacing the battery within the next 8-10 months since that's how long they've been lasting, after which it'll be time to say goodbye to the MB brand, which is a shame because I really like the style of the vehicle, the ride, and ergonomics with a few quirks here and there. I like it more than the 2025 with the Tablet sized infotainment system (I don't care for it, ergo is not up to par with previous models as it takes longer to find what your looking for while driving). It took me over a month to decide what to buy after my Caddy and now it looks like I'll be facing that dilemma again, but MB definitely won't be in the new car line up. The 2025 looks nice inside, but has a few quirks that even if the battery issue was solved would keep me from buying it.
The point is, if you are getting the critical battery low notification, you are driving your car consistently and your battery is less that 2-years old, the MB battery is failing and needs to be replaced period.
Why it's failing is the $1B question that not even MB can seem to solve at this point. I'm on my 4th battery since 2021 when this notification first started popping up and I don't see it ever ending.
*Has anyone replaced their battery with a non-MB battery and still encountered this critical-low battery issue? If so, this would clearly point to a defect in the charging system, although MB would deny it since it is a non-MB battery. *
I'm tracking a US-based lawsuit and encourage anyone else having battery charging issues to do the same. The information is in my previous post above.
YMMV
(do I really need to drive a Benz?). They also replaced the battery under warranty AGAIN with no indication of what keeps causing the battery to fail. The service advisor knew better to feed me that same BS about me not driving the car enough, when I drive to work daily (I just have a short commute), but I have their previous comments in writing on the service ticket from the last time they changed the battery saying something like "if the customer doesn't drive the car for at least 10K Mile per year, the battery will begin to fail and this will void the warranty." I asked for it in writing from MB, but never got it. Because they knew that was BS that I would eventually call them out on. I have one more year under factory warranty and I suspect I will be replacing the battery within the next 8-10 months since that's how long they've been lasting, after which it'll be time to say goodbye to the MB brand, which is a shame because I really like the style of the vehicle, the ride, and ergonomics with a few quirks here and there. I like it more than the 2025 with the Tablet sized infotainment system (I don't care for it, ergo is not up to par with previous models as it takes longer to find what your looking for while driving). It took me over a month to decide what to buy after my Caddy and now it looks like I'll be facing that dilemma again, but MB definitely won't be in the new car line up. The 2025 looks nice inside, but has a few quirks that even if the battery issue was solved would keep me from buying it.
The point is, if you are getting the critical battery low notification, you are driving your car consistently and your battery is less that 2-years old, the MB battery is failing and needs to be replaced period.
Why it's failing is the $1B question that not even MB can seem to solve at this point. I'm on my 4th battery since 2021 when this notification first started popping up and I don't see it ever ending.
*Has anyone replaced their battery with a non-MB battery and still encountered this critical-low battery issue? If so, this would clearly point to a defect in the charging system, although MB would deny it since it is a non-MB battery. *
I'm tracking a US-based lawsuit and encourage anyone else having battery charging issues to do the same. The information is in my previous post above.
YMMV
Read my posts regarding this issue. It is a known issue that MB has danced around for as it turns out for quite some time. There's also a US-based class-action lawsuit (GA) regarding critically low battery issues that ends with the battery rapidly going dead. It's not just you.
2021 GLC-300 AMG Line 4matic w/28K mi, MB just replaced my battery for the 4th time. Same issue. If that notification keeps coming up, your battery has a bad dying cell.
I’m moving into Week 3 after the “update”. Still no battery alerts. Still have my fingers crossed 🤣
My car has always been parked in the garage, which is one floor below my apartment. 🙂
If it's still going dead or low after locking it there is another issue. Best to lemon it. What state are you in?
Here is my current theory - keep the keys as far away from the car as possible and don’t move them (motion sensor in the fob). Why? - because these cars sit on the dealer’s lot for a relatively long time and you don’t see the dealer going out there attaching a charger to all his inventory every week. This doesn’t make it right but until MB comes up with a fix this may be worth a try.
You're 100% correct. It's a software issue that Mercedes cannot figure out. Mercedes bought my car back for the same reason it's been sitting at the dealership for a week after 6 days it went into low the car is locked 2 weeks totally dead there's definitely a drain somewhere
Sounds good in theory, but in practicality this is not a solution. The reason why, is that I keep my keyfob and house keys in a FARADAY box for security reasons. No RF signals enter or escape once the box is closed and sealed. Tested using a cellphone so I know that it is working. I also live in a 3rd floor condo and park a good distance from my building.
I'm not certain how this impacts other vehicles, but I suspect that the MercedeMe App via infotainment system is slowly draining the battery while parked. Software updates are downloaded even while the car is parked and not running.
So if I park my car each night, and only drive 10-15 minutes a day becuase of a short commute, by the 3rd day the Low Battery notification comes pops up. This would make more sense to me, particularly since the MB voltage sensor appears to be incredibly sensitive once voltage it dips below 14v. I also theorize that becuase the draw so slight, it goes undetected when the vehicle is at the dealer when the run their diagnostics. It's just a thought, becuase something is causing these batteries to drain and that appears to be the only thing that continues to have power going to it when the car is shut off. They've had several tech bulletins related to battery charging issue over the past several years, so I think they're probably missing this one... 🤷♂️
I think it's the MercedesMe App and infotainment system when the vehicle is shutoff. It's still active becuase it downloads updates while the car is parked.
I just picked up a loaner yesterday after dropping mine off AGAIN after picking it up last Wednesday because of this never ending issue. They replaced the battery last week and the car was driven daily except for the ICE storm we had on the east coast Sunday. I drove to my office on Monday, drove home for lunch, got back to the office and get the Low battery notification and emails
. With that short of time and driving 30+ mile daily in less than 1 week, that should not be happening, if anything it should've popped up in the morning when i first started it if it were cold related. I dropped it off this morning and haven't heard back yet and it's approaching closing time, so I'm not sure what the status is besides the image that living rent-free in in my head of "two techs and a master mechanic standing there scratching their GD heads."
A buy back would be nice. I've had the problem 4 months after it was delivered. I was in the middle of moving and mostly ignored it as long as I drove the car more than 20 minutes in one shot daily, it didn't pop back up, until I moved to shorten my commute... This is the 4th battery since 2021, one for every year. Here in VA you must have the same repair done 3 times in 18 months... After the 3rd, battery I started thinking lemon law but I was passed the 18 months.
At first I thought it was because I bought a COVID model since it was assembled in 2020.
But other people are having that same issue with different models and years, so we can't blame it on the virus.
I'm following a class-action lawsuit against MB in the State of GA, hopefully it will open the door for me to get a buy back before my warranty expires next year, otherwise this car is going to become a "second owner's problem" after I trade it for a non-MB vehicle... and I'm never coming back 😂
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I’m facing the same issue, my new 2025 GLC 300 just driven 400 miles throwing low battery message. I’m worried… what did you do how is it cleared
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I've been getting that every week lately, the dealer has failed once on a solution. It's back in next week.
I will ask them about the system check looping as per Kyle's post.
I will ask them about the system check looping as per Kyle's post.
Ours SUV was bought back under lemon law and a big fight. Would I ever deal with Mercedes, Never. Bought a new X5 M factory delivery was extremely happy. No comparison. Even getting better MPG not that it matters. Our dealer was incredible to deal with if anyone is interested. FYI ,I have a lawyer that does SC and GAI just picked up a loaner yesterday after dropping mine off AGAIN after picking it up last Wednesday because of this never ending issue. They replaced the battery last week and the car was driven daily except for the ICE storm we had on the east coast Sunday. I drove to my office on Monday, drove home for lunch, got back to the office and get the Low battery notification and emails
I dropped it off this morning and haven't heard back yet and it's approaching closing time, so I'm not sure what the status is besides the image that living rent-free in in my head of "two techs and a master mechanic standing there scratching their GD heads."
A buy back would be nice. I've had the problem 4 months after it was delivered. I was in the middle of moving and mostly ignored it as long as I drove the car more than 20 minutes in one shot daily, it didn't pop back up, until I moved to shorten my commute... This is the 4th battery since 2021, one for every year. Here in VA you must have the same repair done 3 times in 18 months... After the 3rd, battery I started thinking lemon law but I was passed the 18 months.
At first I thought it was because I bought a COVID model since it was assembled in 2020.
But other people are having that same issue with different models and years, so we can't blame it on the virus.
I'm following a class-action lawsuit against MB in the State of GA, hopefully it will open the door for me to get a buy back before my warranty expires next year, otherwise this car is going to become a "second owner's problem" after I trade it for a non-MB vehicle... and I'm never coming back 😂
If you trade it you will take a major hit, they are doing nothing at the auctions. PM me if you need anything
I just got an SMS message the dealer with a link to sign the service ticket. I figured, they either fixed it or just replaced the battery for the 5th time ... Well, they replaced the battery but the service tech's message stating the following LIE, "Connected SDS and battery charger, test result came back "battery not OK", replaced battery... customer requested vehicle back before diagnosis was completed" The the QC tech writes: customer has been asked to drive the car for 14 days and return if battery warning messages return".
PROBLEM IS
I never asked them for my vehicle back. The advisor called me yesterday by mistake thinking I was a different customer. When he realized it, he said that they are still observing my car and trying to detect a draw on the battery when the car is shut off, but had not discovered it yet. He said they'd would have my car for a couple more days. I said OK... that was yesterday morning. So this morning I get the SMS to sign the service ticket... WTF???
The dealer is basically kicking the can down the road until my warranty expires as they have done since 2022 when I first brought it to them for this issue. We are now on battery #5. Not one of these batteries lasted 12 months in this vehicle. The last one they installed lasted 1 week.... yes... that's correct, 1 week.
I'm about to call the dealer's GM. This is completely unacceptable. 🤬
... Well, they replaced the battery but the service tech's message stating the following LIE, "Connected SDS and battery charger, test result came back "battery not OK", replaced battery... customer requested vehicle back before diagnosis was completed" The the QC tech writes: customer has been asked to drive the car for 14 days and return if battery warning messages return".PROBLEM IS
I never asked them for my vehicle back. The advisor called me yesterday by mistake thinking I was a different customer. When he realized it, he said that they are still observing my car and trying to detect a draw on the battery when the car is shut off, but had not discovered it yet. He said they'd would have my car for a couple more days. I said OK... that was yesterday morning. So this morning I get the SMS to sign the service ticket... WTF???
The dealer is basically kicking the can down the road until my warranty expires as they have done since 2022 when I first brought it to them for this issue. We are now on battery #5. Not one of these batteries lasted 12 months in this vehicle. The last one they installed lasted 1 week.... yes... that's correct, 1 week.
I'm about to call the dealer's GM. This is completely unacceptable. 🤬
(2021 GLC300 AMG Line 4Matic) There were a series of tech bulletins released over the past several years concerning the battery charging system that doesn't appear to resolve the issue completely. If you just drove 400 miles and got that warning, take it back to the dealer becuase that battery is failing or is going to fail. Depending on where you live, check your lemon laws. Had I known I only had 18 months, I would've started that process long ago. In my state you have 18 months and the car must have the same repair done 3 times. This problem started 4 months after the vehicle was delivered. Don't let it fester or ignore it. The minute it comes on, take it to the dealer.. get it on record so that if and when you file a claim under the Lemon Law, it is documented. Another member here just got his bought back by MB becuase they couldn't figure it out.
In my case, the battery will work fine for several months and then I'll start getting that message and every time I start getting that message, the battery ends up being replaced. There's a class-action lawsuit regarding this issue in the US (Georgia), their focus is on sudden battery drain where the car will not start. But I believe All of these issues are connected, and I suspect it to be the infotainment system, becuase it downloads updates while the car is parked and shutdown. The system does diagnostics as soon as the car is shutdown. also, so I think somehow, this system is putting a draw on the battery that somehow is damaging one of the cells. Just my assumption since I've been dealing with this since the summer of 2021 , but it's a better hypothesis than what the dealers is coming up with by telling me that I don't drive my car frequently enough when I drive to work albeit a short commute, but I drive the car daily. If I don't drive it for 20 minutes straight each day, by day 3, the low battery message pops up like clockwork.
for the past month, I've remote started the vehicle nearly each time after I arrive to work or at home, just so that the message doesn't pop up and I'll be able to remote start the car the next morning when it is freezing outside, until I forget to do it. Took it to the dealer 2 weeks ago, they replaced the battery, one week later the message popped back up. It's been at the dealer since the Monday before last. it's still there, and they just replaced the battery without figuring out the issue AGAIN.
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