48v battery breakdown

[Askino1]

My c200 displayed a red 48v notice and advised that the car be stopped and I refer to the manual. Once I parked safely the car wouldn't start anymore and even the AA couldn't sort out the problem hence car had to be recovered after a 6 hr wait. As anyone heard of this kind of problem ?

 

[BTB 500]

I guess your car is a facelift (2018 onward) C200, which is a 'mild hybrid'. Looks like there's a problem with the drive battery - is the car under warranty?

 

[markjay]

Strange - were you actually stranded?

Who "advised that the car be stopped"?

The reason for asking is that Amber warnings usually mean that the car can be driven but taken to a workshop at the earliest opportunity - it's the red warning that are meant to tell you that the car shouldn't be driven any further.

 

[markjay]

I guess your car is a facelift (2018 onward) C200, which is a 'mild hybrid'. Looks like there's a problem with the drive battery - is the car under warranty?

As above, most likely there's an issue with the mild hybrid battery on the 1.5L EQ engine.

Where's the car now - at the dealer? Also, you say you called out the AA - is the car not covered by Mercedes Benz Mobilo roadside assistance? They will usually have MB STAR diagnostic computer and can diagnose issues ar the roadside.

 

[Askino1]

I guess your car is a facelift (2018 onward) C200, which is a 'mild hybrid'. Looks like there's a problem with the drive battery - is the car under warranty?

Yes it's a 2019; no it's not under warranty

 

[Askino1]

Strange - were you actually stranded?

Who "advised that the car be stopped"?

The reason for asking is that Amber warnings usually mean that the car can be driven but taken to a workshop at the earliest opportunity - it's the red warning that are meant to tell you that the car shouldn't be driven any further.

The message on the main screen was red advising an immediate stop and later indicated that the whole command center would shut down in 3 min and did. The car was moving but not accelerating. I was just lucky to have reached residential street location shortly after

 

[Askino1]

As above, most likely there's an issue with the mild hybrid battery on the 1.5L EQ engine.

Where's the car now - at the dealer? Also, you say you called out the AA - is the car not covered by Mercedes Benz Mobilo roadside assistance? They will usually have MB STAR diagnostic computer and can diagnose issues ar the roadside.

I didn't have mercedes Benz cover. As it was Sunday car was initially recovered to my son's house as he lives close to a MB service dealership. It will be recovered to MB today

 

[Askino1]

Thanks for all responses thus far

 

[Petrol Pete]

Please let us know how you get on .

Best of luck.

 

[Askino1]

Please let us know how you get on .

Best of luck.

Thanks, this is the report from the road side AA:

Patrol found the following fault code/s:System : Electric drive - SKG / El. drive 48V EV ECU5.3 Status 061B00 - Internal control module torque control. Error Message : Malfunction. Fault stored. Status 0AFA68 - 48V battery. Error Message : Signal missing. Fault stored. Status :B21E368 - Battery separation. Error Message : Error detected. Fault stored. Engine Oil Level Ok. Coolant Level Ok. - Garage to investigate

Merc recovered to MB this a.m

 

[markjay]

I didn't have mercedes Benz cover. As it was Sunday car was initially recovered to my son's house as he lives close to a MB service dealership. It will be recovered to MB today

Mobilo roadside assistance is automatic with each dealer service and is valid for up to 12 months after the last service date. I take it that the car wasn't serviced by a dealer in the last 12 months?

 

[BTB 500]

Good luck with getting it sorted - as above do keep us posted. I don't think I've heard of this problem on a facelift C200 before ... the C350e has had some issues with the drive battery, but generally when older.

How long have you had the car, and where did you get it from?

 

[Askino1]

Mobilo roadside assistance is automatic with each dealer service and is valid for up to 12 months after the last service date. I take it that the car wasn't serviced by a dealer in the last 12 months?

Thanks for that update

The car was serviced (2 months ago) but not with a dealer; I know better now

 

[markjay]

Thanks for that update

The car was serviced (2 months ago) but not with a dealer; I know better now

There are pros and cons to dealer servicing, see also:

Servicing and ServiceCare FAQ | Parts, Maintenance & Servicing

Disclaimer The authors of this FAQ are not affiliated with Mercedes-Benz in any way. The information in this FAQ is provided in good faith and based on knowledge the authors have acquired through their personal research and experience. The accuracy of the information provided cannot be...

forums.mbclub.co.uk

But let's talk again after the car has been fixed...

 

[Askino1]

Good luck with getting it sorted - as above do keep us posted. I don't think I've heard of this problem on a facelift C200 before ... the C350e has had some issues with the drive battery, but generally when older.

How long have you had the car, and where did you get it from?

Had car from 14 months bought from a Hyundai dealership where I believe it was PEx

 

[BTB 500]

Had car from 14 months bought from a Hyundai dealership where I believe it was PEx

OK. Out of interest what sort of mileage has it done? I also have a 2019 petrol C Class btw, although not a hybrid.

 

[Askino1]

OK. Out of interest what sort of mileage has it done? I also have a 2019 petrol C Class btw, although not a hybrid.

32,000 miles

 

[BTB 500]

Wow. Hope you get it sorted quickly and it's not too expensive. Could be the battery itself is OK and it's just a rogue module/sensor somewhere - the dealer diagnostics should hopefully get to the bottom of it.

 

[Will]

Wonder if it’s related to the starter/alternator? On your car you have a 48v starter that also charges the battery, belt driven.

Don’t see many threads on here with 48v issues that I can recall. Fingers crossed it’s nothing major!

 

[BTB 500]

Wonder if it’s related to the starter/alternator? On your car you have a 48v starter that also charges the battery, belt driven.

Is there a separate 12V battery on these (pretty sure full BEVs still have one)?

If there is and it's OK then that would probably rule out a general charging issue.

Don’t see many threads on here with 48v issues that I can recall.

I don't remember seeing any. And there will be a lot of facelift C200s out there.