Mercedes me connect: battery monitor – charge status critical

[benz2020]

If you only drive for 30 minutes that may not be quite long enough to keep your battery topped up, starting takes a chunk out of the battery and if you drive along in stop start traffic, heaters on, heated seats on then it may not quite bet getting back what was taken out of it. The dealer may be right that there isn’t an issue per say but it could be that with all the tech now in the car you just need to use it a bit more or invest in a charger to go one once a month.

Techinally you are right. When I drove for 2 hours continously the startup-battery lasted for 4 weeks. But please think from the consumer perspective, spending 40K for a brand new high end car needs a long drive every week is definetly not fit for the design of the car and not fit for the purpose.

 

[V6Matty]

Techinally you are right. When I drove for 2 hours continously the startup-battery lasted for 4 weeks. But please think from the consumer perspective, spending 40K for a brand new high end car needs a long drive every week is definetly not fit for the design of the car and not fit for the purpose.

Yep, not disagreeing with you but I think you may find it a hard uphill battle as there is technically nothing wrong with the car.
My S212 had only done some local journeys recently and I noticed things weren’t quite right if I went to drive it the next day, I put it on charge for 24hours and even after being left for almost a week everything was back to normal

 

[SL63 Mark]

Sounds like there's something wrong somewhere.

 

[daveenty]

When I had my W213 E63s (2017MY) I used to get these warnings all the time on the phone app. No problem with the car itself but the app seemed over sensitive, especially on battery warnings. It actually started a few days before I picked the car up and continued throughout my ownership. It was on a charger for most of it's time with me but the days I was using it, I'd invariably get messages after a day or so.

I learnt to ignore it but it was frustrating for a while. I mentioned it to my dealer but they were pretty nonplussed about it and I got the distinct impression that they were more than aware of it, though classed it as a non serious fault.

The latest car (C217 S63, 2020 MY) doesn't have anywhere near the same amount of warnings come up, though they do still happen from time to time.

 

[Srdl]

i would have thought the first thing the dealer would do was to make sure the battery was fully charged?

I doubt it - the “technicians” are only trained to plug it into the computer and then follow whatever process the comouter instructs.

As far as the OP is concerned, I would be inclined to just ignore the app messages and see whether the car actually has a problem. If it does, Mobilo will come and sort it out but then perhaps someone would actually investigate the fault.

 

[benz2020]

When the CRITICAL warning message comes, The dash board says "Check Owners manual for 12 V Startup Battery". So I can say the Mercedes Me app is bot having an issue. When the warning shows in the dashboard then we cant assume anything other than fault in the Electrical system, isn't it ?

 

[barian]

When the CRITICAL warning message comes, The dash board says "Check Owners manual for 12 V Startup Battery". So I can say the Mercedes Me app is bot having an issue. When the warning shows in the dashboard then we cant assume anything other than fault in the Electrical system, isn't it ?

I agree, which is why I asked if there were any dashboard messages.

 

[Simon1234]

@benz2020 just come across this forum and am having exactly the same issue! I did a 200 mile round trip on Saturday and got this notice on
I have had this 5/6 times now! Car is 8 months old and has 3000 miles on it

Did you get anywhere with resolutions! Blooming car! When it pops up on the app it also does when I go to the car but car always (so far) starts perfectly with no impact of it being low!

 

[Ron240]

I drive my car for 10 minutes twice a day on an each way commute of 6 miles and my battery is fine.
Sometimes the app will report "partially charged" when I have started my car a couple of times when washing and not driven anywhere.
Bought brand new less than 13 months ago.

My point being that a battery only a year old from new should not have a problem with this.

 

[mioba]

Did anyone do schoolboy stuff and actually get a voltmeter across battery prior to starting after leaving the car a night; then a test with it running, then a test a few hours after leaving it. This will id if its the battery or not. Basics folks

 

[Killa81831]

I have same car same problem I bought mine in june of 2021 glc 300 4matic night package , same battery problem it first started saying low battery like a week after I got it then the past few weeks has been saying critically low and I took it in to get it diagnosed and they said nothing was wrong with it but then I read on the Diagnostics paper that it did say there was something with the battery but they said it was fine but yeah I'm and go to another dealer and see if they had can give me a second opinion if anybody has any knowledge about this please help ,I have researched a little bit and then what I have seen is that it is a battery problem and they should just replace it when it comes from the factory it was use too much and so it doesn't come fully charged so the battery is defectibe and should be replace it but first time I got it checked they didnt replace it, smells like a classs action lawsuit to me ! Haha $$$

 

[MercM2Mb]

You may also be able to check the battery voltage via the dashboard. On my Eclass It shows up on the 'engine data' screen, next to the bhp and torque dial displays. (Audio 20)

 

[Tony Dyson]

It sounds to me as though the voltage operating parameters are set too high in one of the modules, perhaps the ECM or BCM? and are being momentarily triggered during cranking where you can typically expect a PD of 2-3v during cranking on a healthy car battery and up to 5-6v on a battery that needs attention. This would explain the persistent warnings triggered after startup and likely to be just another one of those niggles that MB will never admit to and will eventually fix in a scheduled update some time in the future?

 

[Carlos.amg]

Model : MERCEDES-BENZ GLC 300 4MATIC AMG LINE 5 door Estate Petrol Automatic 1991cc

I have bought this car in Octiber 2020 as brand new from a Mercedes dealer. Within 30 days of purchase , the car started giving the warning

"Mercedes me connect: battery monitor – charge status critical "​

Warning message:

The starter battery charge status of the vehicle AA99XYZ is critical.
To ensure that the vehicle is able to start, please connect a battery charger or drive the vehicle for 30 to 60 minutes.
When using the battery charger, please observe the notes in Owner's Manual in your vehicle.

Eventhough I am driving he car for 30 mins a day , this warning is coming frequently.

I have given the car to the dealer for thorugh check up, they said no problem with the battery, wires, etc. But the warning is still coming.

I am so worried and frustrated about Mercedese and don't think Mercedese GLC is fit for my purpose.

Could you some one advise is it normal on all the new model Mercedes ?

What is the return policy in Mercedes other dealers ?

Thank you

Hello

GLC350d - 2018

I have the same issue, the battery has been replaced, been recharged back at the dealership yet the problem still exists. I was told I wasn’t using the vehicle enough, my driving style didn’t suit it and I should consider purchasing a trickle charger to cure the issue!!! All the relevant software updates have been applied to the car at the dealership.

Unhappy with this rhetoric I wrote to the CEO of customer services U.K. Gary Savage at the time, a representative contacted me from his office and I explained the issue.
I asked if MB make and sell vehicles that need an additional battery charging support? Answer was no, asked if they supply a drivers manual to explain why my driving style is unsuitable, answer no!

I was told that there has to be an issue with the electrical system, a parasitic drain somewhere that needs diagnosing and rectifying. The supplying dealer disagreed and didn’t want to know anymore about it! Speaking to my local dealership hasn’t filled me with confidence either as they want to replace the battery, again! it was replaced less than 2 years ago and the problem has never improved, but despite imparting this information the new battery avenue seems there determined route!
I have read that it can be in one of the CAN systems not shutting down entirely, the heated seats, a faulty headlight, the ICE head unit!

Has anyone successfully resolved this issue?

many thanks.

 

[Srdl]

Hello

GLC350d - 2018

I have the same issue, the battery has been replaced, been recharged back at the dealership yet the problem still exists. I was told I wasn’t using the vehicle enough, my driving style didn’t suit it and I should consider purchasing a trickle charger to cure the issue!!! All the relevant software updates have been applied to the car at the dealership.

Unhappy with this rhetoric I wrote to the CEO of customer services U.K. Gary Savage at the time, a representative contacted me from his office and I explained the issue.
I asked if MB make and sell vehicles that need an additional battery charging support? Answer was no, asked if they supply a drivers manual to explain why my driving style is unsuitable, answer no!

I was told that there has to be an issue with the electrical system, a parasitic drain somewhere that needs diagnosing and rectifying. The supplying dealer disagreed and didn’t want to know anymore about it! Speaking to my local dealership hasn’t filled me with confidence either as they want to replace the battery, again! it was replaced less than 2 years ago and the problem has never improved, but despite imparting this information the new battery avenue seems there determined route!
I have read that it can be in one of the CAN systems not shutting down entirely, the heated seats, a faulty headlight, the ICE head unit!

Has anyone successfully resolved this issue?

many thanks.

If the dealer won't investigate properly, I would go straight back to Head Office and put the ball back in their court to sort it it the vehicle is out of warranty so they might just not be interested.

Otherwise, try a respected local independent who will use common sense and experience to diagnose the problem rather than rely on “computer says….”. Where are you based, someone may have a recommendation.

 

[Carlos.amg]

If the dealer won't investigate properly, I would go straight back to Head Office and put the ball back in their court to sort it it the vehicle is out of warranty so they might just not be interested.

Otherwise, try a respected local independent who will use common sense and experience to diagnose the problem rather than rely on “computer says….”. Where are you based, someone may have a recommendation.

Hello

i contacted an independent with 20 years experience and 10 years as a MB technician, he had never heard of the GLC having this issue? My local dealership is woeful, wouldn’t trust them to inflate the tyres to be honest. The list of balls ups is long, too long to list but the last service driving home it said check the oil level when I stop. Took it back, the technician had misread the technical data, put 6 litres of engine oil instead of 8, and it’s got a physical dip stick, so what confidence you can have in these people is minimal, certainly with a potentially troublesome issue.

I am based in Norfolk, I would very much appreciate any recommendations for a specialist who could cure the issue, it’s either that or it will have to go!