[Forrester]

Thanks for replying! I did read that thread but it doesn’t make all that much sense to me. Pretty much since having the car I have run it on petrol but since having charging points installed at work I’ve been running it more on electric - could that be the issue? I’m so stressed that Mercedes are going to find a major fault and it’s going to cost me the earth to repair!!

If you have had all the services undertaken by MB and there is a major fault, you will almost certainly receive a GW gesture either from the garage or MB.

 

[Forrester]

Just a basic question as I’ve recently been charging my 12v battery and am now more aware of its fixings. Has anyone tried tightening the terminals. I am sure as non MB cars of the past, they can just work loose over the miles.

 

[Forrester]

As for the final sentence, I have literally no idea what that means about my car

It just means they have come across the same non charging problem on non hybrid cars as well.

 

[Forrester]

So, I have the fault code now which is P0A0A00. I have checked and been advised that the battery health was definitely checked and found to be fine. It’s now back on the garage again as, after handing it back to me with the battery charged up, the same thing happened again two days later. Been told more diag work needed now….at £204 per hour 😱

The battery might be working but I would suggest from my current experience of a 2020 battery I’m not sure it will be fine. Once @alexcannas comes back about the coding ie how to do it at home I would think about replacing the battery and see if that solves it. In the worst case the new battery you replace yourself will cost less than an hour’s MB labour.