Auto Start/Stop Problem
Thread Starter
Junior Member
Joined: Apr 2009
Posts: 24
Likes: 18
From: McKinney, TX
2018 E63S (Sedan)
Auto Start/Stop Problem
So my car has this intermittent problem where if auto stat/stop is on, it will sometimes completely turn off at a red light or even in stop and go traffic. Meaning the engine will not restart after releasing the brake. You have to put in PARK, and then restart the car fresh using the START button. This used to happen very rarely (once every two weeks), but today it happened twice in one day. The length of time stopped doesn’t seem to matter. One of the times it happened today was in stop and go traffic where I was stopped for 2 seconds at the most.
Has anyone experienced this and is there a solution other than going to the dealer? Any input is appreciated. In the meantime I will turn off the feature.
Has anyone experienced this and is there a solution other than going to the dealer? Any input is appreciated. In the meantime I will turn off the feature.
MBWorld Fanatic!
Joined: Jul 2013
Posts: 2,594
Likes: 811
From: Toronto, Ont, Canda
go fast grocery getter wagon
I never use *** at all. Always put into sports mode or higher.
it’s obvious you need to take it not your dealer ASAP as this can be a safety hazard (car behind you can literally hit you assuming you are to go I green light). In the meantime, I suggest to disengage ***.
it’s obvious you need to take it not your dealer ASAP as this can be a safety hazard (car behind you can literally hit you assuming you are to go I green light). In the meantime, I suggest to disengage ***.
MBWorld Fanatic!
Joined: Feb 2007
Posts: 2,550
Likes: 745
From: Cary, NC
2024 AMG EQE SUV , 2021 E63S Wagon - gone, 2018 E63S Sedan - gone
So my car has this intermittent problem where if auto stat/stop is on, it will sometimes completely turn off at a red light or even in stop and go traffic. Meaning the engine will not restart after releasing the brake. You have to put in PARK, and then restart the car fresh using the START button. This used to happen very rarely (once every two weeks), but today it happened twice in one day. The length of time stopped doesn’t seem to matter. One of the times it happened today was in stop and go traffic where I was stopped for 2 seconds at the most.
Has anyone experienced this and is there a solution other than going to the dealer? Any input is appreciated. In the meantime I will turn off the feature.
Has anyone experienced this and is there a solution other than going to the dealer? Any input is appreciated. In the meantime I will turn off the feature.
MBWorld Fanatic!
Joined: Feb 2007
Posts: 2,550
Likes: 745
From: Cary, NC
2024 AMG EQE SUV , 2021 E63S Wagon - gone, 2018 E63S Sedan - gone
So my car has this intermittent problem where if auto stat/stop is on, it will sometimes completely turn off at a red light or even in stop and go traffic. Meaning the engine will not restart after releasing the brake. You have to put in PARK, and then restart the car fresh using the START button. This used to happen very rarely (once every two weeks), but today it happened twice in one day. The length of time stopped doesn’t seem to matter. One of the times it happened today was in stop and go traffic where I was stopped for 2 seconds at the most.
Has anyone experienced this and is there a solution other than going to the dealer? Any input is appreciated. In the meantime, I will turn off the feature.
Has anyone experienced this and is there a solution other than going to the dealer? Any input is appreciated. In the meantime, I will turn off the feature.
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Super Member
Joined: Mar 2021
Posts: 509
Likes: 217
From: Beech Mountain, NC
E63s SL550 GL450
Seems I had read there was a problem with some 48 volt batteries used for the start/stop system. Can't say if that's what your problem may is linked to, but may want to have it checked.
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MBWorld Fanatic!
Joined: Feb 2007
Posts: 2,550
Likes: 745
From: Cary, NC
2024 AMG EQE SUV , 2021 E63S Wagon - gone, 2018 E63S Sedan - gone
Super Member
Joined: Mar 2021
Posts: 509
Likes: 217
From: Beech Mountain, NC
E63s SL550 GL450
Out Of Control!!
Joined: Nov 2018
Posts: 11,632
Likes: 5,454
From: San Francisco Bay Area
2019 C63CS
There have been several reports of this happening with other AMG V8 models. I don't recall if there was ever a solution posted, but it's some kind of a malfunction. Like others, I turn start/stop off first thing after starting the engine. It's a silly and questionable "feature" in an AMG, and just one more thing that can break as evidenced here. If you have lots of short stops, you actually end up using more fuel. For stops of 7 seconds or less, idling uses less fuel than restarting the engine.
Member
Joined: Aug 2019
Posts: 122
Likes: 26
From: Miami, FL
2020 E63S Wagon, 2021 GLE450
My 2020 wagon’s auto stop/start rarely even works. I daily drive my car and put a lot of miles on it. Last time it worked was about 3 months ago, and it turned off once at a red light, for about 5 seconds. Then it turned itself back on. I prefer it this way. I hate that feature. I’ve been thinking of mentioning to my SA, but I always forget.
MBWorld Fanatic!
Joined: Feb 2007
Posts: 2,550
Likes: 745
From: Cary, NC
2024 AMG EQE SUV , 2021 E63S Wagon - gone, 2018 E63S Sedan - gone
My 2020 wagon’s auto stop/start rarely even works. I daily drive my car and put a lot of miles on it. Last time it worked was about 3 months ago, and it turned off once at a red light, for about 5 seconds. Then it turned itself back on. I prefer it this way. I hate that feature. I’ve been thinking of mentioning to my SA, but I always forget.
Newbie
Joined: Oct 2021
Posts: 1
Likes: 0
E200 (W213)
I have suffered from the same problem in recent 1-2 months. It worsened gradually. Now If the START/STOP is turned on, failure to restart happens several times a week. If I turn off the START/STOP, it wouldn't happen. I visited the MB car maintenance plant, they told me it was caused by the fault starter motor. It cost more than USD1,600 to change to a new one. I hesitated to pay for it and went to another two different maintenance plants (not MB official), one claimed the same cause (fault starter motor) and the other said it may be due to faulty software.
Keeping to search for a better solution. Very appreciate your sharing and suggestion, if any.
Keeping to search for a better solution. Very appreciate your sharing and suggestion, if any.
MBWorld Fanatic!
Joined: Jun 2014
Posts: 1,590
Likes: 683
From: IL
19 E63s, 23 M3 compX, B9 SQ5
I haven't encountered this problem, but with my tune the start/stop function is disabled in every mode except Comfort. It works as expected in comfort, but i rarely use it for the same reason we all hate it. I rarely ever drive in comfort I haven't had the chance to encounter this potential issue.
MBWorld Fanatic!
Joined: Dec 2013
Posts: 2,394
Likes: 239
E63
I never use *** at all. Always put into sports mode or higher.
it’s obvious you need to take it not your dealer ASAP as this can be a safety hazard (car behind you can literally hit you assuming you are to go I green light). In the meantime, I suggest to disengage ***.
it’s obvious you need to take it not your dealer ASAP as this can be a safety hazard (car behind you can literally hit you assuming you are to go I green light). In the meantime, I suggest to disengage ***.
Super Member
Joined: Feb 2019
Posts: 594
Likes: 311
From: South Florida
E63S Wagon
Plinke, that is super dangerous as another poster pointed out. Until you get it 100% sorted out, you've got to make sure to disable *** on start up every time. I haven't heard of this issue on here until this thread.
(un)Luckily for me my battery is so rarely fully charged up, that my start/stop hardly ever activates. Early next year I am moving and doubling my commute to four miles, so perhaps I'll need to contend with it more. The drive unit controls make it about as easy as you'd hope it to be.
(un)Luckily for me my battery is so rarely fully charged up, that my start/stop hardly ever activates. Early next year I am moving and doubling my commute to four miles, so perhaps I'll need to contend with it more. The drive unit controls make it about as easy as you'd hope it to be.
Member
Joined: Feb 2010
Posts: 117
Likes: 33
From: USA
W213s
The malfunction it is due to a bug in software , happened to me in 2015 with my new c63s . A reflash solved the problem , hope this helps , unfortunately at a time it was done only at the dealer .
Last edited by mack1ro; Oct 1, 2021 at 06:18 PM.
Junior Member
Joined: Oct 2018
Posts: 34
Likes: 40
From: Atlanta
2019 Mercedes E63S Estate
We picked up our 2019 in Stuttgart and drove down to Italy as a part of European Delivery. We spent some time around lake Cumo and at one point we stopped at a traffic light on a VERY busy one-lane road and the autostop engaged, but when I took my foot off the break the car didn't restart, and NOTHING I did would make it start. I had to get help in pushing it to the side. After pushing it and sitting for a few minutes, I tried again and it started right up. For the rest of the trip, I turned off the auto start feature. When I dropped it off I told Mercedes about it, they said they fixed it at the delivery center and I never had the issue happen again.
Thread Starter
Junior Member
Joined: Apr 2009
Posts: 24
Likes: 18
From: McKinney, TX
2018 E63S (Sedan)
Auto Start/Stop Resolution
So while the car was in for its B service I had them look at the as/s problem. In addition to that problem, I have recently had an issue where once every 2 weeks or so all the safety systems would go offline. A simple restart of the car would solve that problem.
The dealer chalked both issues up to a failing battery and replaced it. Others have stated that the as/s problem could be starter related. If it happens again I will make a further update.
The dealer chalked both issues up to a failing battery and replaced it. Others have stated that the as/s problem could be starter related. If it happens again I will make a further update.
Out Of Control!!
Joined: Apr 2019
Posts: 12,170
Likes: 6,883
From: Silicon Valley
W212 MY'14 M276-3.5NA @75kMi
the iceberg tip...
So while the car was in for its B service I had them look at the as/s problem.
In addition to that problem, I have recently had an issue where once every 2 weeks or so all the safety systems would go offline.
A simple restart of the car would solve that problem.
The dealer chalked both issues up to a failing battery and replaced it.
Others have stated that the as/s problem could be starter related.
If it happens again I will make a further update.
In addition to that problem, I have recently had an issue where once every 2 weeks or so all the safety systems would go offline.
A simple restart of the car would solve that problem.
The dealer chalked both issues up to a failing battery and replaced it.
Others have stated that the as/s problem could be starter related.
If it happens again I will make a further update.
Let's string all the pieces together towards a fix:
- Low battery disables EcoS/S
- Sometimes restarts impossible
- Random "xyz safety disabled" errors
- Sometimes limp modes strike
When the alternator output drifts near 11V it's only the tip of the iceberg!
The hidden part are the CAN disruption that corrupt the charging system and cause F-SAM to get sleepless.
Replacing batteries and starters wasted prematurely is silly
Last edited by CaliBenzDriver; Jan 29, 2022 at 10:32 PM.
Newbie
Joined: Apr 2023
Posts: 1
Likes: 1
GLC 250 Coupe
Auto Start/Stop Problem
I have suffered from the same problem in recent 1-2 months. It worsened gradually. Now If the START/STOP is turned on, failure to restart happens several times a week. If I turn off the START/STOP, it wouldn't happen. I visited the MB car maintenance plant, they told me it was caused by the fault starter motor. It cost more than USD1,600 to change to a new one. I hesitated to pay for it and went to another two different maintenance plants (not MB official), one claimed the same cause (fault starter motor) and the other said it may be due to faulty software.
Keeping to search for a better solution. Very appreciate your sharing and suggestion, if any.
Keeping to search for a better solution. Very appreciate your sharing and suggestion, if any.
MB checked & confirmed my Starter Motor is fine. Another Dealer even looked into my ECU unit. All efforts were in vain. I have to remember to turn off the Auto Start/Stop button, else I will faced the same problem. Your advice to the solution please!
