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Discussion Starter · #1 ·
Hi everyone, wondering if anybody else has encountered this issue.

I’ve had the EQC about 2 months now and all of a sudden it started making a squealing noise when turning left and sometimes when going straight. The sort of sound you would hear when braking when pads are going.

I took it to the dealership and after about 4 visits they seemed to have located the issue with a clip of somesorts that is basically milimeters away from the pads and is a safe braking system from what I understood…

So they seperated it a couple millimeters more and the noise has been gone for about 3 weeks, only to come back strong again today and its driving me mad.

Obviously I’m going to have to take it back yet again, but it worries me that its happened again and so soon, so the fix wasnt all that good…

Has anybody else had this issue?
Cheers!
 

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I've heard a faraway squeal at low speed that I thought was rats. But I think it is brake issue like you say. I do a few hard "emergency" brakes or wash the car and it seems to have brought the problem under control. Avoid parking car with wet brakes helps too it seems. I may get a specialist caliper cleaning spray to remove brake dust etc too
 

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Discussion Starter · #3 ·
So this is still happening. The dealership has removed the brake pads, made some changes to the sensor pin and some spray lubricant? and re-fitted, at most the noise is gone for a week, then its back with a vengeance. I recorded a video of the sound today and uploaded to YouTube. This happened right after starting to drive and the car had been charging for a full 10 hours.


What do you think?
 

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Firstly I would like to preface that a mechanic should know much better than me if you showed them the video.

That sounds like the brake caliper is making contact off and on from uneven surfaces from lack of use.

I suspect the regen braking is being used so much that the calipers barely get used at all, so caliper contact surfaces have rust / sand etc build-up. One method to prevent regen from happening is to brake while in neutral however there are suggestions in the user manual to avoid going above 50kph in neutral if you are going to try this.

The second method is to brake harshly. Really stomp and hold down hard on that brake pedal from high speed as possible, when safe to do so, and you will hear the ABS and some of the rust get removed. It may sound like the brake is being damaged but the brakes are designed for harsh braking. You could get a professional driver to show you. I do this maybe once per trip as a preventative measure or if I hear that noise. I think I can detect it from the feel of the car days before the noise starts to happen even.

Alternatively you could get a second opinion from a few different Mercedes dealers and show them the video. Let us know if progress is made
 

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Following up my last message, the method of engaging neutral at any speed seems actually ok as there is no warning in the instruction manual. The notice about staying under 50kph is only if towing which makes sense. To engage neutral tap down on lever to engage drive but don't go all the way. You will see N instead of D in the instrument cluster. Then brake and regen should be prevented so the caliper can remove some of the sand or whatever is happening in the crevice. Then engage drive the normal way again when stopped. I would avoid doing when other traffic is nearby in case you need to accelerate for example and if there are other conditions anyone else knows about I would be interested to hear.
 

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To engage neutral tap down on lever to engage drive but don't go all the way.
More accurately I should say.. To engage neutral tap UP on gear lever while in (forward) drive gear. I had forgotten about this nuance.

I prefer the method of braking hard enough on occasion to engage the calipers that way though as it is
 

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Omg how many sites i read since I've got this forum. I have the same issue the same noise except i have another type of car but exactly the same noise. I was change brake pads and do the same noise but now i know i need to change also the discs with the pads 😕 its crazy how annoying can be this noise 😑 i hope this change it will fix for my car also.
 

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Hi everyone, wondering if anybody else has encountered this issue.

I’ve had the EQC about 2 months now and all of a sudden it started making a squealing noise when turning left and sometimes when going straight. The sort of sound you would hear when braking when pads are going.

I took it to the dealership and after about 4 visits they seemed to have located the issue with a clip of somesorts that is basically milimeters away from the pads and is a safe braking system from what I understood…

So they seperated it a couple millimeters more and the noise has been gone for about 3 weeks, only to come back strong again today and its driving me mad.

Obviously I’m going to have to take it back yet again, but it worries me that its happened again and so soon, so the fix wasnt all that good…

Has anybody else had this issue?
Cheers!
Mine cane back after the dealer told me it was the brake disc. I am still having this issue after a month. What do i do?
 

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Firstly I would like to preface that a mechanic should know much better than me if you showed them the video.

That sounds like the brake caliper is making contact off and on from uneven surfaces from lack of use.

I suspect the regen braking is being used so much that the calipers barely get used at all, so caliper contact surfaces have rust / sand etc build-up. One method to prevent regen from happening is to brake while in neutral however there are suggestions in the user manual to avoid going above 50kph in neutral if you are going to try this.

The second method is to brake harshly. Really stomp and hold down hard on that brake pedal from high speed as possible, when safe to do so, and you will hear the ABS and some of the rust get removed. It may sound like the brake is being damaged but the brakes are designed for harsh braking. You could get a professional driver to show you. I do this maybe once per trip as a preventative measure or if I hear that noise. I think I can detect it from the feel of the car days before the noise starts to happen even.

Alternatively you could get a second opinion from a few different Mercedes dealers and show them the video. Let us know if progress is made
I tried this and did not work. I was hoping it would! I searched on youtube and found a video that says steering column requires lubricant. I need some help as the dealer already changed my disc. I still have the same problem
 
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