W463A stalling and power loss
Thread Starter
Newbie
Joined: Jul 2010
Posts: 13
Likes: 5
Mercedes G-class W465
W463A stalling and power loss
hello
my car has stalled several times as i was in city traffic and once on highway. i lost all power steering and brakes. it has only happened 5-6 times so far in about 30k kilometers and in 2,5 years of driving. And like always ... dealer has no fix for it, even cant detect it.
has anyone els had same problems? any solutions?
my car has stalled several times as i was in city traffic and once on highway. i lost all power steering and brakes. it has only happened 5-6 times so far in about 30k kilometers and in 2,5 years of driving. And like always ... dealer has no fix for it, even cant detect it.
has anyone els had same problems? any solutions?
MBWorld Fanatic!
Joined: Oct 2019
Posts: 5,160
Likes: 1,772
From: Colorado
G550
hello
my car has stalled several times as i was in city traffic and once on highway. i lost all power steering and brakes. it has only happened 5-6 times so far in about 30k kilometers and in 2,5 years of driving. And like always ... dealer has no fix for it, even cant detect it.
has anyone els had same problems? any solutions?
my car has stalled several times as i was in city traffic and once on highway. i lost all power steering and brakes. it has only happened 5-6 times so far in about 30k kilometers and in 2,5 years of driving. And like always ... dealer has no fix for it, even cant detect it.
has anyone els had same problems? any solutions?
MBWorld Fanatic!
Joined: Oct 2019
Posts: 5,160
Likes: 1,772
From: Colorado
G550
hello
my car has stalled several times as i was in city traffic and once on highway. i lost all power steering and brakes. it has only happened 5-6 times so far in about 30k kilometers and in 2,5 years of driving. And like always ... dealer has no fix for it, even cant detect it.
has anyone els had same problems? any solutions?
my car has stalled several times as i was in city traffic and once on highway. i lost all power steering and brakes. it has only happened 5-6 times so far in about 30k kilometers and in 2,5 years of driving. And like always ... dealer has no fix for it, even cant detect it.
has anyone els had same problems? any solutions?
Senior Member
Joined: Sep 2005
Posts: 432
Likes: 40
From: Savannah GA
2020 G550
Yes, there are a couple of threads on here about the issue. One person said dealership did an update to his transmission.
Same story from dealer in all cases, no solution and no detection of an issue when they plug it into diagnostics.
Same story from dealer in all cases, no solution and no detection of an issue when they plug it into diagnostics.
Senior Member
Joined: Apr 2020
Posts: 390
Likes: 83
From: North Dakota
2021 G550, BMW X5M, 2020 Toyota Supra LE
Was you Stop/Start active when it happened?
With more and more of these threads popping up, I would imagine Mercedes has to be aware of it....likely playing dumb until they can find a fix.
With more and more of these threads popping up, I would imagine Mercedes has to be aware of it....likely playing dumb until they can find a fix.
Member
Joined: Jun 2009
Posts: 161
Likes: 26
From: Toronto
G550
check out this thread... this issue has happened to me. although its only happened once so far (i dont put a lot of miles on my G). dealer couldn't find the issue.
https://mbworld.org/forums/g-class-w...top-issue.html
https://mbworld.org/forums/g-class-w...top-issue.html
Trending Topics
Member
Joined: Mar 2006
Posts: 215
Likes: 64
From: NJ
2009 S550 4Matic 2009 GL 550 2009 AM DBS
This has happened 3x with our 2020 G550 and each time on a slight hill and in Comfort mode with stop/start activated. Took into service and they found that the battery wasn't being fully charged and felt this was the culprit. So, they installed the new battery and said now its "seems" okay. Guess we'll see if it happens again.
MB World Stories
The Best of Mercedes & AMG
6 Mercedes Models That Did NOT Age Well (But Are Somehow Still Cool)
Verdad Gallardo
Manual Mercedes? 6 Times Sindelfingen Let Drivers Have All The Fun
Verdad Gallardo
Mercedes SLR McLaren 722 S Is Extremely Rare Example Modified by McLaren
Verdad Gallardo
8 Classic Boxy Mercedes Designs That Have Aged Like Fine Wine
Verdad Gallardo
Flawlessly Restored Mercedes 190E Evo II Heads to Auction
Verdad Gallardo
Electric Mercedes C-Class Unveiled: 11 Things You Need to Know
Verdad Gallardo
Mercedes EQS Gets A Major Update: Everything You Need to Know
Verdad Gallardo
5 Underrated Mercedes-Benz Models That Don't Get the Love They Deserve
Verdad Gallardo
Mercedes 300D Has Pushed Well Past 1 Million Miles and It Ain't Stopping
Verdad Gallardo
Member
Joined: Jun 2009
Posts: 161
Likes: 26
From: Toronto
G550
i dont know if its a weak battery that is causing this. but i have been driving for about 2k miles with start/stop turned off ever since the stalling issue occurred and it hasnt returned so far. lets hope it stays that way.
MBWorld Fanatic!
Joined: Oct 2019
Posts: 5,160
Likes: 1,772
From: Colorado
G550
Member
Joined: Jun 2009
Posts: 161
Likes: 26
From: Toronto
G550
What I find least appealing about the ECO start/stop "feature" is its reliance on probably a dozen or or so sensors, and the consequential conditions, to function as intended. Even if all these conditions are binary factors, there are 2^12 (4096) possible combinations that have to be accounted for in software, of which some combinations tell the engine to shut off, some tell the engine not to shut off, and the rest are assumed unlikely to ever happen. If you recall the "sudden acceleration" incidents involving Audi's and Toyota's, it seems highly probable now that when indeterminate states arise, the default action is always to kill the engine. In an earlier related post about this engine stalling phenomenon, I asked not only about the ECO start/stop activation state, but also if the driver was "two-footed" -- braking with the left foot and gassing with the right foot -- but nobody ever replied on this. If you can imagine yourself being a car's ECU tasked with deciding when to shut the engine on and off, and being issued two conflicting commands -- "stop .. no wait, go .. no wait, stop .. no, I mean go .. really, I mean it this time, but can't you do both?" -- it's easy to understand why you as the ECU would give up and kill the engine.
Member
Joined: Sep 2019
Posts: 137
Likes: 54
From: NYC
G63s and a few others
Thread Starter
Newbie
Joined: Jul 2010
Posts: 13
Likes: 5
Mercedes G-class W465
One thing im sure of is that its not realated to start/stop. as i always drive in sport and start/stop is off in that mode. Also in my case its not always realated to low speed. Once it turned off on highway ... but i was lowering speed to make a turn. I think i have one of oldest cars here as i received it in august 2018 and in that time it has turned off 5-6 times. So 2k miles trouble free driving does not show it is solved im afraid 
Member
Joined: Jun 2009
Posts: 161
Likes: 26
From: Toronto
G550
One thing im sure of is that its not realated to start/stop. as i always drive in sport and start/stop is off in that mode. Also in my case its not always realated to low speed. Once it turned off on highway ... but i was lowering speed to make a turn. I think i have one of oldest cars here as i received it in august 2018 and in that time it has turned off 5-6 times. So 2k miles trouble free driving does not show it is solved im afraid
in my case, they were of little help. they said there were no error codes saved in the system related to the sudden shut down. they sent some of my data to merc canada and told me to keep driving and monitor the car. lol... really not much help. they did say they'll give me a call if any potential fixes come up. this was 4 months ago and i havent heard anything.
Member
Joined: Jan 2017
Posts: 129
Likes: 40
From: NJ
2020 MB AMG G63, 2022 MB AMG SL55
Just reading this thread and ugh what??? First the windshield cracking up and now the car dies while driving... I agree G is not for everyone but hell not for dead one either. It must be devastating to those who've already experienced this issue, but please keep us posted as it could happen to any of us.
