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There is not a lot of direct EQC chatter that I can find in france but so far i have not seen any similar complaints. However a french reviewer made the specific point about how the car in semi autonomous driving uses data from the cameras and topographical data from the navigation system to control the car and as a result the braking feel was variable. I have seen similar references elsewhere. So maybe a starting point would be to see if the problem only arises in I assume D auto when the cars brain is engaged and it is that that is altering the feel of the brake because the car is already taking action to slow itself one assumes possibly by a mix of regen motor braking and traditional hydraulic braking. I also wonder if our Australian cousins have any comments particularly Natroth who I know has had his car for a year plus.
 

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I have noticed this too. It seems to not apply the brakes but to use regen and the braking distance is not as short as expected.
 

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I can replicate some braking issues. If you put the car in D-- mode drive relatively fast lift off the throttle so regen hits -80 and then if by chance you hit a pot hole, the brake peddle is a mess. Still havent found the culprit for the peddle going rock solid though which is my biggest concern, this seems to happen out the blue and virtually impossible to drop without then having to smash the peddle to the floor to which it skids and abs cuts in. Worrying.
 

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Hi @Henliston, does the braking change at all or is it just how the pedal feels?
Hi We have now had our EQC400 in the garage for a 4th time, car brakes failing to operate. The brake pedal doesn't, travel and is solid or rock hard, we are very concerned that we will cause a incedent, this problem as now happens 7 times, the car is 10 months old. After 4 months the care needed a new hard drive, the car doors automatically locked with the key inside the car and we now have another intermittent fault coming on the panel saying Active Brake Assist, currently limited See Owners Manual. We need help, me and my wife have been driving Mercedes since 1980 and owned around 50 cars with no issues, what as gone wrong.
 

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Sorry to hear of your trouble. I have had no issues with the brakes on my car albeit the feel of the brake pedal is more variable than previous cars I have had depending on the aids that may or may not be in use ie if I am using just dAuto, or with cruise control and the full driving assistance system or with the limiter only. The ABS does seem more sensitive and cuts in more than I have l previously experienced on my other mercedes. But I cannot say I find the difference in feel in anyway troubling and the car always feels under control.
Re the keyless go system (first car I have had with it) I was surprised it was possible to lock the car with the keys in it but it can of course be opened with the app….we do find that having two people carrying their own keys can sometimes be a source on confusion and if the car is opened by one key which goes out of range because it demands the key be put in the centre console likewise if one is plipped from afar to open the car and then the other is used to drive it. Also noted the other day when washing it with a key in my pocket the car was opening and closing seemingly randomly but actually it was the effect of wiping the car down triggering the door switches….remember to put the keys somewhere else out of range next time! Overall however the kick to open the tailgate is almost flawless and when it fails it is simply not having the relevant key the car has latched onto close enough.
I have experienced error messages on the freinage de urgence assistance (Active Brake Assist) with a sprecific warning it is temporarily unavailable (in french so I do not know the message used in the english versions). I have also experienced the same for the assistant adaptif feu plus most frequently. Both have occured on dark wet misty or very wet nights and both have cleared quickly. On looking at the manual it is clear the systems can stop working in the event of rain or wet and cold damp conditions, I think the camera lense mists up as it usually happens early on in an evening run and clears a few mins later as the car warms up a bit (as much as BEV do). I have experienced warnings re the driving assistance system before on my e class in very heavy rain. The manual states this can be the cause and the system will switch back once conditions allow so what is the specific warning you get is it referring to a temporary failure or does it say that the function is limited? According to the manual if you do not have the pack assistance de la conduite (driver assistance package) you need to take the car to a garage if you get the message.
It might be there is nothing wrong with the Active Brake assist be interested in your response re the type of message and what pack the car has.
Re the key is there any possibility of the other key being responsible?
Brakes other report similar but not sure if it is merely on the continume of the brake system feeling different, I have always assumed due to the effect of the drive train and regen hydraulic systems working together in a way none of us have experienced before, or if there is some sort of bug in the system that can on occasions seemingly lock the brakes but surely pressing on the pedal causes a physical reaction unless of course it is fly by wire. Mercedes are very safety concious and I would not expect them to take risks on brake systems but who knows? Let us know what your garage say.
I do find that the pads stick so there is often a firm clunk when I pull away after the car has stood overnight. I use dAuto all the time and brake as I normally would and the discs look clean and not rusty, my e class would do it occasionally…
When a car does not deliver as you hope it is frustrating and upsetting and even worse when people like me rock up saying they have no problems. Why did they replace the hard drive by the way?
Good luck and let us know how you get one.
 

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I have the same issue. Random non responsive breaks. I put it down to being an electric car, but this is not good enough from MB. When I hit the breaks I don't know what kind or response I am going to get.
 

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I have the same issue. Random non responsive breaks. I put it down to being an electric car, but this is not good enough from MB. When I hit the breaks I don't know what kind or response I am going to get.
So are you saying the car does not slow in anyway? What do you do to bring the car under control? Have you spoken to Mercedes and what are they saying? Or is it that the car does not respond as you expect and is not slowing as you expect it to. Is there a particular drive mode it happens in or when using a driving assistant sytem?
Am not sure one can say it is not good enough from MB poor brakes are not good enough from any manufacturer. What is hard to fathom is what is causing the issue and also to understand how the problem could arise ie is the hydraulic system controlled electronically thereby enabling it to be prevented from operating if the wrong signals are sent or received. I would have expected the system to have a failsafe position that it can at least always be operated manually.
In the manual it does make it clear that if there is a brake failure and the red warning light comes on then the brake will feel different and may need different pressure, maybe the problem is something to do with it defaulting to a non assisted system ie as when the servo failed on older systems, just thinking out aloud but it is something that needs a response form mercedes.
 

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So are you saying the car does not slow in anyway? What do you do to bring the car under control? Have you spoken to Mercedes and what are they saying? Or is it that the car does not respond as you expect and is not slowing as you expect it to. Is there a particular drive mode it happens in or when using a driving assistant sytem?
Am not sure one can say it is not good enough from MB poor brakes are not good enough from any manufacturer. What is hard to fathom is what is causing the issue and also to understand how the problem could arise ie is the hydraulic system controlled electronically thereby enabling it to be prevented from operating if the wrong signals are sent or received. I would have expected the system to have a failsafe position that it can at least always be operated manually.
In the manual it does make it clear that if there is a brake failure and the red warning light comes on then the brake will feel different and may need different pressure, maybe the problem is something to do with it defaulting to a non assisted system ie as when the servo failed on older systems, just thinking out aloud but it is something that needs a response form mercedes.
I'm not a mechanic or engineer, just a driver of 30+years. I know what good brakes should feel like. It is the feel of the brake pedal that is inconsistent. I'm not going to waste my time going to and from the dealership.
 

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I'm not a mechanic or engineer, just a driver of 30+years. I know what good brakes should feel like. It is the feel of the brake pedal that is inconsistent. I'm not going to waste my time going to and from the dealership.
Well your reply has cleared up some of the concerns, you are in effect talking in a similar way to me that the brake pedal does feel different at different times and I think that we both seem to think the same that it is due to the electric drivetrain ie electric cars which use regen as well as simple hydraulic braking feel different. That is not the same as there being some sort of failure in the system giving some users problems.
I personally have no issues with the variable brake feel but clearly some users do. What would be interesting is to see whether users or other manufacturers electric cars have similar opinions to try to see if it is a mercedes electric car issue or if electric cars in general might throw up similar experiences being discussed on this forum. I did try searching for other info on this topic and so far have not found anything but I will continue looking. Maybe we could see what EQA drivers think?
I shall have a little play with mine too and see if I can replicate the rock hard feeling on demand so to speak.
 

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I can see that I have same problem.
Only with this Mercedes, have drove quite many another Mercedes.
Agree this car is different I am on my 5th mercedes e class, GLK, c class, e class and now the EQC. From the GLK on they were all 4matic though the GLK system was different to the later c and e class but all of them were permanent 4 wheel drive whereas the EQC is an electronic system as we know and the car generally runs in FWD.
So my feeling is we are talking about potentially the specifics of this car and its interaction with the electric drive and all the other electronic drive systems it employs not a failure in systems in some specific examples. I see this as quite a big difference in the nature of the issue, ie it is not a reliability issue but a design issue.
As I have said before am interested in what drivers of other BEV think about their cars or is this a specific mercedes issue or tighter still just an EQC issue🤔
 

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I recetly bought an EQA, this EQA was a Demo with 11k Km, when the dealer wanted to deliver the car, the car didnt pass the brake test, it seems the wheels not braking at the same strenth, then the Dealer deliver me new one with 78Km, i guess maybe some problem with brake system in theese cars? Time will tell...
 
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