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
veena_anchan
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Thanks I'll take a look! BTW where is that 12V socket at? Is it like a cigarette lighter?
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Thanks again!!
Right I too would like to hear what that letter said. I have had my 24 GLC 300 in the dealership four times now with electrical problems of the same type.
Hello, I too have just opened in a complaint with a safety
Complaints.
Hw do you put it in 'Stand By' mode?
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I had the engine light issued, and they did a software upgrade for the 48 V battery to fix it. It was fixed in February 2024 for my new 2023 GLC.
Today, April 15, as I was driving home, I suddenly saw a warning sign indicating that reversing was not possible—services were required while I was driving forward.
I stopped my car and continued to drive for less than a minute, and the same message appeared!!! So I drove to Mercedes Heritage. After hours of waiting, they wanted me to leave the car overnight just in case...
But, I am not too sure: what does it mean?
But everyone was done for the day, and my options were limited, so I left my car there, but when that " reversing is not possible, services required to sign" showed up, my car could not drive forward; it felt like Mercedes is forcing my brake on its own.
It reduced my speed from 60/KM to 20/KM forcefully, and I could not even pick up the speed if I wanted to.
It is scary...
Today, April 15, as I was driving home, I suddenly saw a warning sign indicating that reversing was not possible—services were required while I was driving forward.
I stopped my car and continued to drive for less than a minute, and the same message appeared!!! So I drove to Mercedes Heritage. After hours of waiting, they wanted me to leave the car overnight just in case...
But, I am not too sure: what does it mean?
But everyone was done for the day, and my options were limited, so I left my car there, but when that " reversing is not possible, services required to sign" showed up, my car could not drive forward; it felt like Mercedes is forcing my brake on its own.
It reduced my speed from 60/KM to 20/KM forcefully, and I could not even pick up the speed if I wanted to.
It is scary...
what did you guys do then? is it resolved now completely?
Is it completely resolved for you now? Also, how do these loaners work? Is it covered by MB only or through your insurance?
I have the same problem with my 2019 Mercedes GLC300 for the past 4.5 years. Dealer's, need to drive the car for longer distance at least once a week.
Disconnect the bluetooth and use the vehicle for at least 20km in total at least twice a week, no issues with mine. Every time I activate the bluetooth my battery drains current. I suspect the car keeps communicating Mercedes continuously and your mobile phone. Hence, there is a curreent drain from the battery.
Padman
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This may or may not have been previously discussed. If so, please excuse. I just bought a new GLC built in Nov 23.
I learned many cars and motorcycles ago to always put every new vehicle on a charger. New batteries get fluid added by the manufacturer and are not fully charged. Then they are put in a new build without ever being charged to full capacity. then the partially charged battery is used several times at most before they are sold to custmers several months later. None of this is good for any battery.
By the time I bought my GLC and drove home the AGM rated at 80ah was reading at less than 20% charge. It took almost 2 days charge @ 1.3 amps....do the math. So my brand new 80ah battery is now fully charged at about 60ah. Just imagine the havoc discharged batteries are causing to complex electronics. Good luck winning problems caused by a improperly maintained battery. Been there done that. Buy a good "smart charger" and connect every new battery you buy to it, then hook it up for a top-off charge a couple of times a year.
I learned many cars and motorcycles ago to always put every new vehicle on a charger. New batteries get fluid added by the manufacturer and are not fully charged. Then they are put in a new build without ever being charged to full capacity. then the partially charged battery is used several times at most before they are sold to custmers several months later. None of this is good for any battery.
By the time I bought my GLC and drove home the AGM rated at 80ah was reading at less than 20% charge. It took almost 2 days charge @ 1.3 amps....do the math. So my brand new 80ah battery is now fully charged at about 60ah. Just imagine the havoc discharged batteries are causing to complex electronics. Good luck winning problems caused by a improperly maintained battery. Been there done that. Buy a good "smart charger" and connect every new battery you buy to it, then hook it up for a top-off charge a couple of times a year.
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I had the same issue of getting messages that the battery is critical. The issue was not the battery, but turned out to be one of the controllers in the driver side front door remained active. This also caused other controllers needing to be reset, due to lights switching while driving at night. Or the full beam would automatically switch on, „blinding“ on coming traffic. The garage kept the car for just over a week running diagnostics which: - confirmed battery was not the problem - software update was required - faulty controller needed to be replaced - complete reset of the car‘s electronics Whilst I have not had a problem since, I am wary and still keep an eye the cars behavior.
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According to the following link the hybrid GLC doesn't have an alternator and charges the battery while coasting or decelerating.
Several times we've done long freeway trips (8 hours +) using cruise control pretty much the entire time, and suffered the low voltage battery warning the next day.
I assume on those trips we're not coasting/decelerating enough to charge the battery (?)
Several times we've done long freeway trips (8 hours +) using cruise control pretty much the entire time, and suffered the low voltage battery warning the next day.
I assume on those trips we're not coasting/decelerating enough to charge the battery (?)
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Finally, they tried software updates which seemed ok for 3 months then the 12V battery warnings happened maybe 4 times over the year. Nothing bad until I found a totally dead GLC300 yesterday- no warnings . Used key fob to manually open door/ hood . Will try to jump or tow today. Only new thing was a seemingly random parking brake warning X 2 in 6 weeks- didn’t seem related to this latest total failure. this will be visit 6, 4 batteries and counting ( with a currently dead car)
I have a 2021 GLC-300. My battery issues began a few months after purchasing. This issue is very consistent and the car has been back and forth to the dealer several times in 2022, 2023, and 2024. They changed the battery three times. The last time was Dec 2023 and in Nov 2024 the issue started happening again.
While everyone here's case might differ, I've been dealing with this and documenting it for the past two years. I have never had an issue with my car not starting, however, I get the Low Battery warning if I don't drive my car for at least "20 minutes" each day. How so?
I relocated closer to my office about 3-4 months after I bought the car. During those 3-4 months, I had zero issues. My commute was 13 miles, 15-20 minutes each way. Once I moved, my commute was reduced to 3 miles, 5-7 minutes each way. This is when the problem began.
I don't drive much, I don't go anywhere and go home for lunch daily, therefore I'm driving on average 9-10 miles daily with stops at the grocery store included along the way.
If I do not deviate from my normal driving routine, EXACTLY on the 3rd day, the low battery message will appear in the app and on the dashboard once the vehicle has started. I'll then need to drive the car for at least 20 minutes to resolve this, and then in exactly 3 days it will reappear if I have not driven the REQUIRED 20 minutes.
I documented this, took photos of dash message, and time... I forwarded this to the dealer.
The first few times, I went, they could not find any issues. Then I realized that I likely was in between the 3 day cycle and needed to bring the car in when the message is scheduled to actually appear so that the mechanic see's the message on the dash when he starts the car.
Once I brought the car in when the message would appear, the had the car for a week trying to figure out the issue.
Their solution: Replace the Battery
Their reason: Customer does not drive the car often enough. If less than 10,000 miles is put on the vehicle each year, there will be damage to the battery and it will void the warranty...
I drive to work daily, come home for lunch daily, the car does not sit for long periods of time undriven, unless I decide not to leave the house on the weekend. I average 7K miles per year. Their explanation did not make any sense. What about all the cars sitting on the lot? Are they running, or driving those vehicle for 20 minutes daily?
I asked for it in writing from Mercedes but the dealer never sent it to me. I may have in on the service ticket and in email.
The last time they replaced the battery (Dec 2023), I thought the issue was resolved, but likewise, within a few weeks (Jan 2024) I was back with the same issue but this time, I saw moisture in the rear taillight housing. They replaced the taillight and the charging issues disappeared until Nov 2024. I thought that was the end of the issue until recently when the message started popping back up.
Unlike some of the other posters, I've never had an issue starting the car. It always starts without a problem, however, once that message appears, ALL remote APP functions are disabled. In the winter this sucks and I paid for MercedesMe services that I could not use. MB got slick and decided to charge their customers annually for the ability to remotely start their car. I can't remember the last car I owned in the past 20 years that I could not start remotely using the key fob.
Now, I'm scheduled to return to the dealer for this ongoing battery issue. There seems to be a pattern here, and more going on than MB is willing to admit to.
Most of you appear to have only had this issue occur shortly after purchasing the vehicle, in which case, the car sitting on the lot for long periods might've been the cause. However, those who are routinely having the issue should monitor the amount of time you are driving the car and the miles driven between each time the message appears in a similar fashion to what I have done.
I suspect that your results are likely similar to mine (I'm willing to bet that everyone with a 2021 model will have the exact same result as I if they drive less than 20 minutes total per day. I believe owners with this issue should band together for a Class Action Lawsuit. I've been dealing with this since 2021 and heading back to the dealer Monday for the same damn issue.
The dealer's salesmen keep calling trying to get me to trade up...
Seriously, while I love the car, do they really think I will buy another MB after dealing with battery issues since the year I bought it? Like I said, I don't drive much (2021 with only 28K mi), but that should not be causing battery issues if I drive the car daily, regardless of how far or how long.
YMMV
While everyone here's case might differ, I've been dealing with this and documenting it for the past two years. I have never had an issue with my car not starting, however, I get the Low Battery warning if I don't drive my car for at least "20 minutes" each day. How so?
I relocated closer to my office about 3-4 months after I bought the car. During those 3-4 months, I had zero issues. My commute was 13 miles, 15-20 minutes each way. Once I moved, my commute was reduced to 3 miles, 5-7 minutes each way. This is when the problem began.
I don't drive much, I don't go anywhere and go home for lunch daily, therefore I'm driving on average 9-10 miles daily with stops at the grocery store included along the way.
If I do not deviate from my normal driving routine, EXACTLY on the 3rd day, the low battery message will appear in the app and on the dashboard once the vehicle has started. I'll then need to drive the car for at least 20 minutes to resolve this, and then in exactly 3 days it will reappear if I have not driven the REQUIRED 20 minutes.
I documented this, took photos of dash message, and time... I forwarded this to the dealer.
The first few times, I went, they could not find any issues. Then I realized that I likely was in between the 3 day cycle and needed to bring the car in when the message is scheduled to actually appear so that the mechanic see's the message on the dash when he starts the car.
Once I brought the car in when the message would appear, the had the car for a week trying to figure out the issue.
Their solution: Replace the Battery
Their reason: Customer does not drive the car often enough. If less than 10,000 miles is put on the vehicle each year, there will be damage to the battery and it will void the warranty...
I drive to work daily, come home for lunch daily, the car does not sit for long periods of time undriven, unless I decide not to leave the house on the weekend. I average 7K miles per year. Their explanation did not make any sense. What about all the cars sitting on the lot? Are they running, or driving those vehicle for 20 minutes daily?
I asked for it in writing from Mercedes but the dealer never sent it to me. I may have in on the service ticket and in email.
The last time they replaced the battery (Dec 2023), I thought the issue was resolved, but likewise, within a few weeks (Jan 2024) I was back with the same issue but this time, I saw moisture in the rear taillight housing. They replaced the taillight and the charging issues disappeared until Nov 2024. I thought that was the end of the issue until recently when the message started popping back up.
Unlike some of the other posters, I've never had an issue starting the car. It always starts without a problem, however, once that message appears, ALL remote APP functions are disabled. In the winter this sucks and I paid for MercedesMe services that I could not use. MB got slick and decided to charge their customers annually for the ability to remotely start their car. I can't remember the last car I owned in the past 20 years that I could not start remotely using the key fob.
Now, I'm scheduled to return to the dealer for this ongoing battery issue. There seems to be a pattern here, and more going on than MB is willing to admit to.
Most of you appear to have only had this issue occur shortly after purchasing the vehicle, in which case, the car sitting on the lot for long periods might've been the cause. However, those who are routinely having the issue should monitor the amount of time you are driving the car and the miles driven between each time the message appears in a similar fashion to what I have done.
I suspect that your results are likely similar to mine (I'm willing to bet that everyone with a 2021 model will have the exact same result as I if they drive less than 20 minutes total per day. I believe owners with this issue should band together for a Class Action Lawsuit. I've been dealing with this since 2021 and heading back to the dealer Monday for the same damn issue.
The dealer's salesmen keep calling trying to get me to trade up...
Seriously, while I love the car, do they really think I will buy another MB after dealing with battery issues since the year I bought it? Like I said, I don't drive much (2021 with only 28K mi), but that should not be causing battery issues if I drive the car daily, regardless of how far or how long.
YMMV
Just did a search and someone has already filed a class action lawsuit in the US for this very issue.
We are not alone. Not sure of the status yet, but wanted to share the details.
Jones et al. v. Mercedes-Benz USA, LLC et al.
Filed: July 1, 2022 ◆§ 1:22-cv-02628
A proposed class action lawsuit claims that certain Mercedes-Benz vehicles manufactured between 2004 and 2022 suffer from a defect that can cause rapid battery drainage.
We are not alone. Not sure of the status yet, but wanted to share the details.
Jones et al. v. Mercedes-Benz USA, LLC et al.
Filed: July 1, 2022 ◆§ 1:22-cv-02628
A proposed class action lawsuit claims that certain Mercedes-Benz vehicles manufactured between 2004 and 2022 suffer from a defect that can cause rapid battery drainage.
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Is a 21 GLC a hybrid?
My 23 hybrid is booked into the dealer again but I have no confidence in a resolution.
My 23 hybrid is booked into the dealer again but I have no confidence in a resolution.
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