EQC High Voltage Battery Failure

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Atrueguy

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Jun 14, 2014
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So, back in April I took the plunge and leased a pre registered EQC 400 AMG Line Edition through MB Finance. We chose to lease rather than buy with the uncertainty of the EV project and felt the lease enables me to test the water so to speak. Well, the EQC was a genuine WOW moment and the nighttime charging at 7.5 ppkwh makes the 400BHP monster cheap as chips to run. After around 3 weeks and 1000 miles my wife received a text message from MB saying there was a high voltage battery fault. Strange as we’d used the car the day before and the display showed around 60% battery charge and we experienced no problems. Anyway, by the time the AA arrived the car was totally dead and a loan C Class was dropped off by EuropCar that evening. The following day (4th May 2024) the EQC was dragged onto a flat bed and taken to our local dealer where it’s been since. After 5 days the C Class was swapped for an EQB 350 which we’ve had since with no problems. We’ve had no calls from MB with any updates and when I’ve called most weeks I’m told the battery is on it’s way from Germany but that’s now over a month and the battery still isn’t here. I did say I wanted to reject the vehicle in my first call to their assistance but that seems to have never hit MB as when i called this week to reject i was told their process is 8 weeks. I know things fail but it would be nice if it felt like MB were bothered.
 
Well not a expert in leasing but I would have thought you contact the lease company and reject the car.

As above.

And, even if the car was leased from MB, the dealer and the finance provider will be two separate companies (and obviously two separate legal entities) .
 
It sounds like MB are sorting the issue and have given you a courtesy car during the process? I can’t see what the issue is really?
 
I can’t see what the issue is really?

Presumably the issue is having a smaller car with less range than the one he's paying for, with no idea how long this situation will last for.
 
Presumably the issue is having a smaller car with less range than the one he's paying for, with no idea how long this situation will last for.
The difference is literally only 15 miles. Sizewise they are also pretty similar.
 
The other potential issue is that the car will undergo open heart surgery and will have the battery replaced, and then for the next 3 years the OP will have to live with a car that he does not trust.....
 
The difference is literally only 15 miles. Sizewise they are also pretty similar.

Something else then ... a difference of 114 bhp perhaps? Presumably the OP had his reasons for choosing an EQC rather than the EQB he's got for now.
 
The other potential issue is that the car will undergo open heart surgery and will have the battery replaced, and then for the next 3 years the OP will have to live with a car that he does not trust.....
It should be a fairly straightforward and quick process to replace once the new battery arrives.
 
It should be a fairly straightforward and quick process to replace once the new battery arrives.

IIRC the EQC (and EQB) are versions of the original ICE GLC and GLB. As such they may have a solid floorpan with the battery inside the car, rather than it being under-slung (as is common practice with dedicated EV designs). If that's the case it would likely make replacement more tricky / time consuming.
 
The other potential issue is that the car will undergo open heart surgery and will have the battery replaced, and then for the next 3 years the OP will have to live with a car that he does not trust.....
Or can be under warranty with a brand new battery.
 
IIRC the EQC (and EQB) are versions of the original ICE GLC and GLB. As such they may have a solid floorpan with the battery inside the car, rather than it being under-slung (as is common practice with dedicated EV designs). If that's the case it would likely make replacement more tricky / time consuming.
That’s a disappointing design if so.

Edit:

Does appear to be designed to be removed from the bottom?

IMG-6167.png
 
I was thinking more of concerns over reliability, rather than the cost of repairs.
Oh indeed but if this is the first and only fault and it is being addressed at no cost then trust in the car should not be an issue and hopefully there will be no more problems 👍
 
Oh indeed but if this is the first and only fault and it is being addressed at no cost then trust in the car should not be an issue and hopefully there will be no more problems 👍

This is how I would look at it, too. However, not everyone feels the same about it.
 

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