c4004matic

Im pretty sure its a "hand off" hesitation. At that speed 20-25 (it always happens at this speed!) The low speed collision system transitions to a different level. What is happening is that when it does so, there is a partial activation. It cuts the power for an instant without applying the brakes. It almost feels like a strong shift. Its a software booboo. The same thing also happens occasionally on the highway when passing a big box truck a little too close (not). It's sensing a phantom. It's not an overt safety concern, but MB is well avised to look into it. It could also be a radar sensor issue. Not the little ones we see on the bumpers, the bigger ones behind the bumpers.

AppleFan1

I use to have this small issue. However, it seems to have disappeared for months now.

c4004matic

I still get a little thump on occasion in the exact manner others have reported.

Nitro Racing

same here... i learned to be "gentle" with acceleration for the first 30 seconds after every cold start. it's annoying. brought it to dealer the SA said maybe a slow response to release rear brake caliper? but he didn't do anything to it as there was no "fault code"

Diesel Benz

No idea where the jerk comes from but it definitely is not the parking brake if that is what you are referring to. What else is there to release? You can hear the parking brake motor run when the brake is release and it only takes a fraction of a second. Brake pads may be "glued" but that too is gone once the car moves the first inch. The parking brake pressure gets completely removed as the motor drive runs the worm scew.

Good if owners find ways to avoid the issue but it would still be interesting to know the real source of that behaviour, specifically when it seems to concern EQS only, or is it all MB EVs? Nothing like that on hybrids or ICE cars even if the brakes should very similar.

hlothery

Mine, too, has almost disappeared....only happens rarely now.

AppleFan1

Mine has completely disappeared over the past 6 months or so.

Ben.kaak

My EQS jerks hard on occasion when accelerating and I get a malfunction light as well. The warning light disappears quickly and the dealer can't figure out the problem. It is a year old and has happened 3 times, generally when I start driving. Frustrating.

c4004matic

Mine still does it in a blue moon. I still think its a sensor or software snafu when the car transitions from slow speed sensors (the ones on the bumpers) to high speed sensors (the larger ones underneath the corners). In effect its kind of a version of (ghosting) whats happening is that the power is cut for an instant. In my case its a small rare annoyance. Aside from a couple of Mbux failures to activate episodes the first few months, the car has been utterly free of problems. I expected hiccups on a completely new model with an entirely new drivetrain. In fact, in my book, it's been better than I had hoped for for such a revolutionary vehicle from a company that, quite frankly, is not known for its reliability. The car drives, rides and performs spectacularly AND has superb EV abilities. Its not perfect but boy what a machine.

nola504

I too feel a "thunk" when I begin driving. It generally happens about 1/2 block after starting forward.

c4004matic

I dont know if its just luck, but I havent had it since the self driving update. Fingers 🤞

AppleFan1

As I’ve stated in the other thread you started, I can’t wait for this major self driving update. Has anyone else here beside c400 received this new over the air update?

jlt1112

Unfortunately, mine still does it after receiving the update. I do find the self driving feature is much more stable.

c4004matic

You popped my bubble

W205C43PFL

Any other thoughts what might be causing it?

Sir Lennox

I too have felt this “gentle kick-in-the-***” phenom!!
Has there been an official answer?

W205C43PFL

I wish there was, crickets so far.

LVO

EQS 580 2022 Date of production 12/21 . Recent update to latest MBUX UI NTG 3.xx , and dealer updated drivers assistance software as well. Jerking from cold starts has resolved (24 to 25 mph). If you have a 2023 model and have this issue, I don’t know what to say.

W205C43PFL

Thank you for this information, will need to look into the update but what was the cause though?

LVO

dealer service advisor maybe able to look up the xentry tips case # and see if there have been updates to the case from MBUSA .

This is from my service log for this issue previously before the new drivers assistance update resolved the issue :

“Test drove vehicle several times for jerking motion intermittently at 26-27 MPH under light throttle. We were unable to duplicate the condition at this time. While driving the vehicle, it was noted that the front E-machine engages at 26-27 MPH under light throttle, which is the speed that the client had reported the condition happening. Xentry tips case # 245289861 was opened for any assistance with this condition. After thorough investigation by Mercedes Bens technical, it was found that there is a software in development to repair this condition. There is no ETA on when the software will become available. When the software becomes available, an update will be sent out so the client can be notified.”

W205C43PFL

I see, thanks.

autotech121

The problem is that the software does not work correctly, which leads to such a problem. Try to go to some car service for a software check. From your area like this service is : https://autoshina.md/regulirovka-podshipnika-stupicy/

W205C43PFL

?

Crito

!

W205C43PFL