View Poll Results: Has your mild-hybrid GLE ever "stalled" at a stop / red light?
No, never had this issue
16
94.12%
I had this issue, after repairs never happened again
0
0%
I had this issue, it happened multiple times
1
5.88%
Voters: 17. You may not vote on this poll
Poll: Has your mild-hybrid GLE ever "stalled" at a stop/red light?
Thread Starter
Junior Member
Joined: Mar 2024
Posts: 22
Likes: 14
2024 GLE450, 2019 A220
Poll: Has your mild-hybrid GLE ever "stalled" at a stop/red light?
Hi all,
It's the second time since I own my 24 GLE 450 that this happens to me: come to a complete stop (i.e. red light), the engine will shut off as expected, but then once you hit the accelerator there is no response and the dashboard gets illuminated like a xmas tree. Restarting the car (ignition off / on) fixes the issue. Engine light is there for a couple of days and it goes away, like nothing happened. This has happened to me at ~8k miles and at 13k miles. The first time I had the car in the dealership for several weeks, they ended up replacing the ground cable for the 48v battery after lengthy diagnosis of the issue with MB Germany.
Now I wonder if this ever fixed anything, or it was just shots in the dark since all the diagnosis for the different subsystems were looking good. I wonder if there is some software issue with auto start/stop where once in a blue moon planets will align the wrong way and it will lead to this complete stall.
Looking back in the forum I've found several folks reporting similar issues: https://mbworld.org/forums/gle-class...ing-issue.html
So here is the poll: if you own a mild-hybrid GLE (450 in my case) have you ever experienced this problem?
It's the second time since I own my 24 GLE 450 that this happens to me: come to a complete stop (i.e. red light), the engine will shut off as expected, but then once you hit the accelerator there is no response and the dashboard gets illuminated like a xmas tree. Restarting the car (ignition off / on) fixes the issue. Engine light is there for a couple of days and it goes away, like nothing happened. This has happened to me at ~8k miles and at 13k miles. The first time I had the car in the dealership for several weeks, they ended up replacing the ground cable for the 48v battery after lengthy diagnosis of the issue with MB Germany.
Now I wonder if this ever fixed anything, or it was just shots in the dark since all the diagnosis for the different subsystems were looking good. I wonder if there is some software issue with auto start/stop where once in a blue moon planets will align the wrong way and it will lead to this complete stall.
Looking back in the forum I've found several folks reporting similar issues: https://mbworld.org/forums/gle-class...ing-issue.html
So here is the poll: if you own a mild-hybrid GLE (450 in my case) have you ever experienced this problem?
MBWorld Fanatic!
Joined: Oct 2009
Posts: 6,987
Likes: 2,184
From: Colorado
'21 AMG53 wDPP & ARC, 19 GLC300 - Former-03 C240,2 ML BlueTecs,20 GLE450 E-ABC,15 Cayenne D,17 Macan
Haven't had the issue, but Christmas Tree is Not Normal.
Yes, a loose ground can cause Christmas Trees and more. I'd say the odds of having if fixed are good.
There was a recall on a very small number of '20 450's (18?) and a TSB during 2021 for grounds. The first was for calibration of a new tool (they knew which cars the new tool was used on). The TSB wasn't so specific, and I didn't see what might have been the cause.
Both fixes seemed to fix the situation, at least based on posts on the forum.
Yes, a loose ground can cause Christmas Trees and more. I'd say the odds of having if fixed are good.
There was a recall on a very small number of '20 450's (18?) and a TSB during 2021 for grounds. The first was for calibration of a new tool (they knew which cars the new tool was used on). The TSB wasn't so specific, and I didn't see what might have been the cause.
Both fixes seemed to fix the situation, at least based on posts on the forum.
Thread Starter
Junior Member
Joined: Mar 2024
Posts: 22
Likes: 14
2024 GLE450, 2019 A220
Haven't had the issue, but Christmas Tree is Not Normal.
Yes, a loose ground can cause Christmas Trees and more. I'd say the odds of having if fixed are good.
There was a recall on a very small number of '20 450's (18?) and a TSB during 2021 for grounds. The first was for calibration of a new tool (they knew which cars the new tool was used on). The TSB wasn't so specific, and I didn't see what might have been the cause.
Both fixes seemed to fix the situation, at least based on posts on the forum.
Yes, a loose ground can cause Christmas Trees and more. I'd say the odds of having if fixed are good.
There was a recall on a very small number of '20 450's (18?) and a TSB during 2021 for grounds. The first was for calibration of a new tool (they knew which cars the new tool was used on). The TSB wasn't so specific, and I didn't see what might have been the cause.
Both fixes seemed to fix the situation, at least based on posts on the forum.
This time around I only saw the Christmas Tree, no companion message like the other time ("48V Error" or something along these lines).
So either the ground cable was not the root cause or this is due to a different problem. In any case this kind of power loss incidents are not acceptable :/
MBWorld Fanatic!
Joined: Jan 2023
Posts: 3,123
Likes: 1,201
GLE 580
Sorry you're experiencing this. This indeed sounds like a safety issue and should be reported to the NHTSA. It takes only 5min:
https://www.nhtsa.gov/report-a-safet...clsrc=ds#index
https://www.nhtsa.gov/report-a-safet...clsrc=ds#index
Super Member
Joined: Nov 2016
Posts: 601
Likes: 273
From: NYC
S63, GLE580, BV250
Dealer mention anything about the starter?
As mentioned above, you may want to consider disabling the start/stop feature. I had it disabled and "remembered" at each startup via coding w/ benzninja, fuel savings was negligible, and was a pain during heavy traffic conditions.
As mentioned above, you may want to consider disabling the start/stop feature. I had it disabled and "remembered" at each startup via coding w/ benzninja, fuel savings was negligible, and was a pain during heavy traffic conditions.
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MBWorld Fanatic!
Joined: May 2018
Posts: 1,432
Likes: 300
From: Illinois
2021 c300 Cab. Arrived 7/28/21 . 24 GLE 450e.
Dealer mention anything about the starter?
As mentioned above, you may want to consider disabling the start/stop feature. I had it disabled and "remembered" at each startup via coding w/ benzninja, fuel savings was negligible, and was a pain during heavy traffic conditions.
As mentioned above, you may want to consider disabling the start/stop feature. I had it disabled and "remembered" at each startup via coding w/ benzninja, fuel savings was negligible, and was a pain during heavy traffic conditions.
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MBWorld Fanatic!
Joined: Oct 2009
Posts: 6,987
Likes: 2,184
From: Colorado
'21 AMG53 wDPP & ARC, 19 GLC300 - Former-03 C240,2 ML BlueTecs,20 GLE450 E-ABC,15 Cayenne D,17 Macan
Dealer mention anything about the starter?
As mentioned above, you may want to consider disabling the start/stop feature. I had it disabled and "remembered" at each startup via coding w/ benzninja, fuel savings was negligible, and was a pain during heavy traffic conditions.
As mentioned above, you may want to consider disabling the start/stop feature. I had it disabled and "remembered" at each startup via coding w/ benzninja, fuel savings was negligible, and was a pain during heavy traffic conditions.
It doesn't actually disable, but the reminder pops up on the screen - "restore S/S" or similar, but you still have to move your finger.
Super Member
Joined: Apr 2011
Posts: 541
Likes: 231
2021 GLS580 | 2011 ML350 BlueTec | 2009 Pontiac G8 GXP
To the OP, have it checked out at the dealer or a trusted independent. There are likely stored codes even if the engine light isn't showing.
Last edited by jkaetz; Dec 16, 2024 at 01:43 PM.
Super Member
Joined: Oct 2022
Posts: 949
Likes: 352
X214
Looking at the options sheet of my 2024 GLE450, it says it has an “Integrated Starter Generator Generation 2” with a code of “94B”.
Compared to my 2022 E450 All-Terrain Wagon, the auto start/stop in the 2024 GLE450 is very imperceptible, and you barely notice the car starting up from a stop. In the 2022 E450 you do feel it a bit. In the E450, I tend to turn off the start/stop function, while in the 2024 GLE450, I don’t feel the need to turn it off, since you barely notice it.
Compared to my 2022 E450 All-Terrain Wagon, the auto start/stop in the 2024 GLE450 is very imperceptible, and you barely notice the car starting up from a stop. In the 2022 E450 you do feel it a bit. In the E450, I tend to turn off the start/stop function, while in the 2024 GLE450, I don’t feel the need to turn it off, since you barely notice it.
Thread Starter
Junior Member
Joined: Mar 2024
Posts: 22
Likes: 14
2024 GLE450, 2019 A220
Yeah – I can disable auto start/stop but with the issue being so rare (every ~7k miles on average) I bet I'll forget to disable it more often than not. I don't want to do coding while in warranty. Also if there is an electrical issue in the car (lose ground, bad cable, etc) I imagine the issue could show up in different ways – I once got a 48V malfunction while going at 20mph; so maybe it would happen regardless even if I didn't stop.
Something I noticed is that I always use the HOLD function when stopping in red lights, etc. I wonder if this makes it more prone to happen – i.e. if the car goes to a semi-parked mode and then there are more checks performed before reigniting the engine when pressing the accelerator.
I think the only way forward is to bring it to the dealership right after this happens again and the error code is still there. But it feels an elusive one, hard to root cause.
Something I noticed is that I always use the HOLD function when stopping in red lights, etc. I wonder if this makes it more prone to happen – i.e. if the car goes to a semi-parked mode and then there are more checks performed before reigniting the engine when pressing the accelerator.
I think the only way forward is to bring it to the dealership right after this happens again and the error code is still there. But it feels an elusive one, hard to root cause.
Super Member
Joined: Apr 2011
Posts: 541
Likes: 231
2021 GLS580 | 2011 ML350 BlueTec | 2009 Pontiac G8 GXP
Something I noticed is that I always use the HOLD function when stopping in red lights, etc. I wonder if this makes it more prone to happen – i.e. if the car goes to a semi-parked mode and then there are more checks performed before reigniting the engine when pressing the accelerator.
I think the only way forward is to bring it to the dealership right after this happens again and the error code is still there. But it feels an elusive one, hard to root cause.
I think the only way forward is to bring it to the dealership right after this happens again and the error code is still there. But it feels an elusive one, hard to root cause.
A dealership visit/scan with Xentry is likely the only way to dig deeper.
Thread Starter
Junior Member
Joined: Mar 2024
Posts: 22
Likes: 14
2024 GLE450, 2019 A220
The only thing that can stall an engine is some type of ignition/fuel/mechanical fault in the engine or something stopping the engine from spinning externally. For ISG vehicles this means the ISG or Transmission. Normally the engine should spin the ISG and torque converter at all times when running. The only faults I can think of are the ISG applying too much charge or brake force or the torque converter locking together at a stop. Neither would be considered normal operation.
A dealership visit/scan with Xentry is likely the only way to dig deeper.
A dealership visit/scan with Xentry is likely the only way to dig deeper.
