"Battery Malfunction" Mercedez Benz C350e Plugin-Hybrid

[Imran K]

Hi all,
I have a 2017 C350e Plugin Hybrid. I received a "Battery Malfunction" message. It was recomended that I change the rear 12V AGM start/stop electric hybrid battery. I purchased a new battery and changed it. However the "Battery Malfunction" message is still showing. I am not sure what is the next step to trouble shoot this issue or how to get this resolved. Has anyone experienced similar and solved. Looking for advice on solving this issue...

 

[NJS5]

Hi Imran - Welcome

Your profile doesn't show where you are from; if we knew this we might be able to make constructive recommendations.

NJSS

 

[Imran K]

Hi, I am from Trinidad and Tobago. But the vehicle was purchased in UK and sent to Trinidad

 

[NJS5]

Sorry I've no MB contacts in Trinidad and Tobago - hopefully someone else will be along to help.

NJSS

 

[Imran K]

Thanks NJSS for your reply. Hope somone else with similar issues can help me trouble shoot

 

[Imran K]

Hi folks, any feedback on this?

 

[Sakar]

Hi guys,
I’m from the UK and have the same warning sign appear. Any help would be much appreciated.
2016 C350e plug-in

 

[Frontstep]

Hi, I am from Trinidad and Tobago. But the vehicle was purchased in UK and sent to Trinidad

Sorry only do house calls..........................

C350e - Auxiliary Battery Malfunction and more... - MBWorld.org Forums

Mercedes Tech Talk - C350e - Auxiliary Battery Malfunction and more... - Hi all, I drive a C350e 2018 (plug in hybrid). Since yesterday i have an error when starting the car: Auxiliary Battery Malfunction Since then it also seems the electric motor is almost not used at all while driving. And in...

mbworld.org

 

[Per Groth Ludvigsen]

Hope your problem was solved. The fault could be from the voltage regulator and not the battery. E.q. part no.: A 205 905 34 14 80

 

[mioba]

or does the warning simply need a reset once a new battery is in.
MB make is rather unfair for many things customers need a computer reset - instinct kicks and they go to the dealers wheras many other code readers would do.

 

[akb]

Hi, new to the forum. My car did the same, after a bit of investigation it appears that the main cable from the high voltage battery is rubbing against the body work causing it to short out. MB want 2500 to replace the loom, but local guy says he can sort for far less. Also there was a recall for this problem early in the cars life.

 

[Frontstep]

I would need an arm firmly up my back to pay that much to sort out a rubbed wire.

I wonder if there was/is a recall or even service advisory for what sounds like a fire risk?

 

[akb]

Apparently there was a recall some years ago, for a similar reason, which was done on my car. This is a new fault, may be related to the recall as in a similar vein, but I don't think enough has been reported to create a new recall.