Input Requested on Issues with 2023/2024 GLC 300
The above link was for the 2023 model, but the time span between the 2023 release of that vehicle and the release of the 2024 model was narrow so it makes me wonder how much time they actually had to discover the main issues. I called a dealership service department who mentioned to me that Mercedes is in transition and going through "growing pains" in the technology area particularly with trying to get the tech to work with combustible engines (vs. electric). A friend of mine who has the EQS sedan with the MBUX multimedia system told me he too had the experience of having his car not start and was able to get the car to start eventually and drove it to the dealer for repair and hasn't had trouble in 2 years.
Do those of you who own the 2023/2024 GLC with the MBUX system find that the initial issues experienced based on the updated model have been rectified? Have you experienced ongoing problems and if so, what are they? Are there members out there who own this vehicle that haven't had any major issues? Your input is very much appreciated!
The above link was for the 2023 model, but the time span between the 2023 release of that vehicle and the release of the 2024 model was narrow so it makes me wonder how much time they actually had to discover the main issues. I called a dealership service department who mentioned to me that Mercedes is in transition and going through "growing pains" in the technology area particularly with trying to get the tech to work with combustible engines (vs. electric). A friend of mine who has the EQS sedan with the MBUX multimedia system told me he too had the experience of having his car not start and was able to get the car to start eventually and drove it to the dealer for repair and hasn't had trouble in 2 years.
Do those of you who own the 2023/2024 GLC with the MBUX system find that the initial issues experienced based on the updated model have been rectified? Have you experienced ongoing problems and if so, what are they? Are there members out there who own this vehicle that haven't had any major issues? Your input is very much appreciated!
This is a complaint from the NHTSA website.
Brand new '24 GLC300 4MATIC. Engine light came on with no error message. Brought it in for service. Miscellaneous engine repair states: "Found current code POA7F00 in drivetrain control unit. Followed LI54.10-P-077250. Cleared codes. Drained 48V battery to below 25% SOC. Charged vehicle to 70% SOC. Job complete." Service foreman mentioned that the service performed may not resolve issue. He contacted Mercedes-Benz Engineering and said no fix at this time and no ETA. Left service with no more engine light on. However, it didn't take long, and the engine light came on again. I called service again, and I was asked to take the car back in to be sure it is not anything else. Took my vehicle back, and service foreman diagnosed the issue. Code is the same as before with issues on the 48V battery. Service foreman is unsure of the exact issue. Mercedes-Benz Engineering did not provide details of the problem. I believe this issue poses a safety risk without knowing for sure what is the real cause and what might be the effects on the vehicle. This GLC is my family daily use, and it has become a big safety concern on the road. Service was very helpful and accommodating with my vehicle's issues. Unfortunately, fix is unknown from Mercedes-Benz to be able to resolve. I have also called the Mercedes-Benz Customer Care, 800-367-6372. Unfortunately, there is nothing they can do. I've asked to open a case. Case # 04660590.
This is a complaint from the NHTSA website.
Brand new '24 GLC300 4MATIC. Engine light came on with no error message. Brought it in for service. Miscellaneous engine repair states: "Found current code POA7F00 in drivetrain control unit. Followed LI54.10-P-077250. Cleared codes. Drained 48V battery to below 25% SOC. Charged vehicle to 70% SOC. Job complete." Service foreman mentioned that the service performed may not resolve issue. He contacted Mercedes-Benz Engineering and said no fix at this time and no ETA. Left service with no more engine light on. However, it didn't take long, and the engine light came on again. I called service again, and I was asked to take the car back in to be sure it is not anything else. Took my vehicle back, and service foreman diagnosed the issue. Code is the same as before with issues on the 48V battery. Service foreman is unsure of the exact issue. Mercedes-Benz Engineering did not provide details of the problem. I believe this issue poses a safety risk without knowing for sure what is the real cause and what might be the effects on the vehicle. This GLC is my family daily use, and it has become a big safety concern on the road. Service was very helpful and accommodating with my vehicle's issues. Unfortunately, fix is unknown from Mercedes-Benz to be able to resolve. I have also called the Mercedes-Benz Customer Care, 800-367-6372. Unfortunately, there is nothing they can do. I've asked to open a case. Case # 04660590.
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I’ve been a loyal Lexus customer for the past 25 years and currently own Lexus 2018 NX300 awd and 2017 GS350 awd. I was going to purchase another NX but the lack of spare tire made me switch to Mercedes. I actually feel the GLC is more solid than Lexus, but I still purchased the extend warranty. 🙂
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The dealership did a 16 module software update. I had the car back in 2 days.
One quirky item that I did notice with the mbux system, it seems that a few times that I have had over-the-air software updates I have had settings change on my profile with in the infotainment system. I am the only one driving this car, and like I said I have seen changes after the over-the-air updates have taken place.
But it all has been running very well and I enjoy driving this spunky little 4-cylinder!


In January we received a check engine light warning enroute to visit my brother out of town. We diverted to the MB Service Center, they checked the code and cleared it but told us to come back in for a software update. 800 miles later we finally did, another extensive software update. My wife picked up the car after two days, drove 4 miles away, parked for 30 minutes and when driving home received the check engine light warning again.
Back to dealer, they did another software update. That was a few weeks ago. Everything seems to be fine now, and we were only stranded once.
But there is a recall coming to replace the fuse box or something to do with the fuse box. MB has not released it for the actual work to be performed but has notified the Service Centers to expect it in April/May.
I don't know if MB has just made the software too complicated or they outsourced the development to a firm that doesn't know how to adequately test. But something is very wrong! Since the powertrain and MBUX are similar in the C300 Sedan which has been out for 18 months earlier than the GLC release I expected these types of issues to be resolved.
One more trip to the Service Center for a "software update" and we are going to request a buy back.
But one other issue I have is the MBUX system turning off with a loud POP when driving and it occurs almost every ride once. The car reboots its multimedia system ( driver screen and Multimedia screen) while driving. I have not been able to find out the root cause. I guess it has to do with Apple car play, when reported to MB service center, they had absolutely no clue
To reproduce the POP sound, press and hold the power button on the multimedia screen.
I called mercedes to check a feature on my car. While conversation they suggested me there is 3 recalls on your car and you can take the car to the dealer for all the updates.
Which I did and post updates, suddenly in few days i see check engine light. the only thing i did was filled a gas that morning.. after some research they mention gas *** may be loose.. i checked and everything was fine. so i filled the tank again and then it wont start..
after some try it started.. drove home and parked the car. next morning it wont start. I had to take to Merc service center , today is 3rd day and still no answer..







