Car lurches when moving forward very slowly like in a tight parking situation
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GLE 580
Car lurches/jolts when moving forward very slowly like in a tight parking situation
Has anyone else experienced a lurch/forward jerk like movement in situations where you're in drive and you might be in a parking situation where you only want to move the car in very small distances, like inches at a time? I think maybe it's a weird transmission negotiation issue of the vehicle switching between the 48v system (GLE 580 MY20), engine, and auto star/stop maybe? It could be quite troublesome if you're in a tight parallel parking situation where you only want to move a few inches and instead it lurches/jolts forward like 2-6".
I'm experiencing this in my tight garage where I need to park my car at a very specific line otherwise I can't close the garage door in the back and don't have room in the front to walk around the car. While parking in my garage, I'll put my front bumper camera on and inch along until the bumper reaches my specific line, all of a sudden this lurch/forward jerk makes me overshoot it. It's really annoying because I then have to backup.
I'm experiencing this in my tight garage where I need to park my car at a very specific line otherwise I can't close the garage door in the back and don't have room in the front to walk around the car. While parking in my garage, I'll put my front bumper camera on and inch along until the bumper reaches my specific line, all of a sudden this lurch/forward jerk makes me overshoot it. It's really annoying because I then have to backup.
Last edited by wildta; Jan 28, 2024 at 10:21 AM. Reason: For better clarification of the issue.
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From: Costco
2023 S500
My GLE experienced the same thing. Trying to crawl the last few inches in the garage can be nerve wracking sometimes. Usually no throttle while in gear provides a relatively consistent amount of movement, but not for my GLE and feathering the throttle will sometimes cause the car to jump forward no matter how lightly you try and press it. I think it is the transmission and the first gear or whatever gear it is on during these instances. My S class is the same, although not as bad. It just feels very inconsistent in these slow speed situations.
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2021 Mojave Silver E450, 2024 Black on Black Jaguar F-pace P400, 2011 335d (RIP), 2010 E350 (sold)
Make sure you are in D1 and then try blipping the gas a bit with your foot firmly on the brake. This should ensure the car isn't thinking about to engage auto stop and that there is some pressure in there. Then slowly release the brake to inch forward.
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GLE 580
I was thinking maybe I just have to turn off the auto start stop when I'm in those situations. Easy to remember when parking in the garage because of the strong association with the location but not always easy to remember when you're on the go. I'll give it a go today and see if just turning it off helps.
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2021 GLC 300 4Matic
it sounds like a trip to the dealer is necessary. the auto stop/start should not be the cause of the problem or needing to blip the throttle. The latter sounds like a recipe for disaster even if you are pressing the brake. Maybe a transmission relearn is necessary.
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2023 GLE 450
I was thinking maybe I just have to turn off the auto start stop when I'm in those situations. Easy to remember when parking in the garage because of the strong association with the location but not always easy to remember when you're on the go. I'll give it a go today and see if just turning it off helps.
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'21 AMG53 wDPP & ARC, 19 GLC300 - Former-03 C240,2 ML BlueTecs,20 GLE450 E-ABC,15 Cayenne D,17 Macan
@wildta have you tried different settings - Comfort, Sport etc?
Can you see a display that shows your actual gears?
Does your gas pedal move freely?
Can you see a display that shows your actual gears?
Does your gas pedal move freely?
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GLE 580
I was thinking maybe I just have to turn off the auto start stop when I'm in those situations. Easy to remember when parking in the garage because of the strong association with the location but not always easy to remember when you're on the go. I'll give it a go today and see if just turning it off helps.
Parked today with auto start stop off and was able to creep very slowly into my garage at my specific stop line and it worked great so it's definitely an issue with the auto start stop.
Last edited by wildta; Apr 9, 2023 at 11:08 PM.
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GLE 580
Took vehicle to dealer today, they said it's "normal" and even my advisor who owns two MBs and was a tech for VW for 8yrs said he keeps his Auto Start/Stop off in those situations.
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2021 GLC 300 4Matic
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'21 AMG53 wDPP & ARC, 19 GLC300 - Former-03 C240,2 ML BlueTecs,20 GLE450 E-ABC,15 Cayenne D,17 Macan
If a battery is fully charged, the car will readily shut down, only restarting when low on charge, or the accelerator requests. Sounds like you're there.
Others who "never experience" it might have lower charged batteries that don't let the engine shut down, so no Restart on acceleration.
So maybe both are "normal."
Just thinking out loud.
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GLE 580
If that's true, then a battery's State of Charge might have an effect on other people's experiences.
If a battery is fully charged, the car will readily shut down, only restarting when low on charge, or the accelerator requests. Sounds like you're there.
Others who "never experience" it might have lower charged batteries that don't let the engine shut down, so no Restart on acceleration.
So maybe both are "normal."
Just thinking out loud.
If a battery is fully charged, the car will readily shut down, only restarting when low on charge, or the accelerator requests. Sounds like you're there.
Others who "never experience" it might have lower charged batteries that don't let the engine shut down, so no Restart on acceleration.
So maybe both are "normal."
Just thinking out loud.
Last edited by wildta; Apr 12, 2023 at 01:54 AM.
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GLE 580
Could it be attributed to bad engine mounts? A friend mentioned this to me and do this test for engine mount test which I'll do when I get my car back.
Update: Engine mounts are fine.
Update: Engine mounts are fine.
Last edited by wildta; Jan 26, 2024 at 09:56 PM.
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GLE 580
Just wanted to revive this thread because I read this post where that owner had their EQboost motor/starter assembly (is this the ISG?) replaced. Just wondering if I should push my dealer into replacing mine to fix my issue as mentioned above.
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2021 GLS580 | 2011 ML350 BlueTec | 2009 Pontiac G8 GXP
This is absolutely a side effect of auto start/stop and will happen on any vehicle some more noticeable than others. The ISG is much better at minimizing it than a traditional starter but it will still happen. Think about what the car sees:
All that said, when coming to a stop where start/stop should engage the transition is pretty good. Much more seamless with the ISG than a traditional starter.
- You're coming to a stop with very light pressure on the brake with the engine running and providing torque
- The car doesn't know whether you intend to stop for a stop light, parking space, or other so it may engage and shut down the engine (no more torque)
- You release the brake to creep forward or backward, now the ISG or starter must refire the engine and immediately begins providing torque while you've released the brake.
- With no brake force the car will jump forward or backward slightly before you re-engage the brake.
All that said, when coming to a stop where start/stop should engage the transition is pretty good. Much more seamless with the ISG than a traditional starter.
Last edited by jkaetz; Jan 27, 2024 at 07:25 AM.
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'21 AMG53 wDPP & ARC, 19 GLC300 - Former-03 C240,2 ML BlueTecs,20 GLE450 E-ABC,15 Cayenne D,17 Macan
This is absolutely a side effect of auto start/stop and will happen on any vehicle some more noticeable than others. The ISG is much better at minimizing it than a traditional starter but it will still happen. Think about what the car sees:
All that said, when coming to a stop where start/stop should engage the transition is pretty good. Much more seamless with the ISG than a traditional starter.
- You're coming to a stop with very light pressure on the brake with the engine running and providing torque
- The car doesn't know whether you intend to stop for a stop light, parking space, or other so it may engage and shut down the engine (no more torque)
- You release the brake to creep forward or backward, now the ISG or starter must refire the engine and immediately begins providing torque while you've released the brake.
- With no brake force the car will jump forward or backward slightly before you re-engage the brake.
All that said, when coming to a stop where start/stop should engage the transition is pretty good. Much more seamless with the ISG than a traditional starter.
The engine shouldn't shut off when you are moving around, unless you're coasting. I doubt that you're coasting into a parking spot.
And the car shouldn't "jump forward" when you release the brake.
Unless I misunderstood your description, it sounds like there's something wrong with your car.
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2021 GLS580 | 2011 ML350 BlueTec | 2009 Pontiac G8 GXP
I don't believe any of those things should be happening as you described.
The engine shouldn't shut off when you are moving around, unless you're coasting. I doubt that you're coasting into a parking spot.
And the car shouldn't "jump forward" when you release the brake.
Unless I misunderstood your description, it sounds like there's something wrong with your car.
The engine shouldn't shut off when you are moving around, unless you're coasting. I doubt that you're coasting into a parking spot.
And the car shouldn't "jump forward" when you release the brake.
Unless I misunderstood your description, it sounds like there's something wrong with your car.
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GLE 580
There is certainly a timing element to it and depending on driving habits I'm sure some people may not experience it. I don't get it regularly, but when I do it's because I'm just about to come to a complete stop and then lift my foot off the brake to continue forward slightly. This is a learned behavior that I've used for 25 years to come to a complete stop and smoothly unload the suspension. I feel like auto start/stop gets aggressive sometimes and decides to stop at the same moment I'm lifting off the brake which then triggers an immediate restart. While I would call it a jolt and not a jump, I can see how some people would call it a jump. In any event, when it happens, it isn't a smooth transition. In response to this behavior I've altered my behavior to come to a more deliberate stop when start/stop is active.
Last edited by wildta; Jan 28, 2024 at 12:11 PM.
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From: MA
MY2024 GLE 450
I never noticed anything of this nature. My garage is pretty tight, a few inches on both sides, so, I’m just rolling into it at 1-2mph, nothing unexpected at all, same for parking at public garages / parking spots or backing up to connect a trailer. We have different ISG version(Gen 2 on 2024) but it would be weird if earlier ones behaved much different. Like, it should not be pushing you forward abruptly if you barely touch the pedal.
What I do is pushing the throttle ever so slightly and dropping it right away, moving the foot to the brake pedal just in case. Never had to use it but a bit hard to imagine somebody overshooting by a foot, like you have to control how the vehicle moves by being ready to apply the brakes.
What I do is pushing the throttle ever so slightly and dropping it right away, moving the foot to the brake pedal just in case. Never had to use it but a bit hard to imagine somebody overshooting by a foot, like you have to control how the vehicle moves by being ready to apply the brakes.
Last edited by stktyz33; Jan 27, 2024 at 11:32 PM.
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GLE 580
Just wondering if I should ask my dealer to try to look into replacing the "EQboost motor/starter assembly" like what another user had replaced as described in their post that I linked above.
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2021 GLS580 | 2011 ML350 BlueTec | 2009 Pontiac G8 GXP
You can try to have them replace it, but I doubt it will eliminate what's happening. The real solution is to decouple the ISG from the ICE engine so that it can provide drive power without starting the ICE engine. This would allow it to shut down the ICE engine and still allow slow forward momentum. That's probably coming in the future.
