ML12NYC

It is the same engine as the E350? Must be tuned differently since it seems it would be too much torque for a sedan.

dgiturbo

Same motor. And you should see the torque of this model...

C63AMG
No such thing as too much.

Al benzo

Had my car turn off on me a few times lol add me on the list got a appointment on the June/11

Carma

1 month old, 2012 E350 coupe with same Blue engine as ML. . have 200 miles. On way to work making Left turn at intersection, had to come to stop and STALLEd. Switched from drive to park and tried pushing start button (keyless) five times over a minute before it restarted. . Very Dangerous. . . Took to dealer who found nothing wrong, no error codes! Very very concerning.

katiesdad7

And since there were no error codes MB will do absolutely nothing to try and troubleshoot it. It is my experience that MB will only pay if there is a code. Its almost like they don't believe you.

TundraRoads

And that's one of the things that really gets me. WHY is there no error code? The engine stalls without the driver turning it off - that SHOULD generate an error code of some sort. Why does it not?

trident9440

I took video when the engine stalled so that I have something to show to the repair guy at MB.

GregW / Oregon

Not every single part of the car is monitored to that degree. Could be anything from a almost broken wire to bad fuel pump, etc.

Carma

Hi, will let you know the outcome . . so far dealer has found "no error code", but told me they are bringing in a mechanic from MB to examine the vehicle. Perhaps we can find an answer. My guess is the fuel abruptly stopped flowing, either a pump or mechanical issues. . .we will see.

shortspark

I just picked up my new ML350 Tuesday and I'm praying I don't have this problem everyone is talking about. I don't know much about these things but when a stall occurs only now and then and the event is not shown in the on-board computer as a readable error code, the first thing to check is a classic case of periodic vapor lock - at least that is what it usually was in the "old" days.

iankayem

Vapour lock is virtually unheard of today, as the pump is in the tank and it pushes the fuel under pressure. In pre-history (with carbs) the pump was on the engine and sucked the fuel.
The mathematics was: Low pressure + heat = vapour = NO GO

shortspark

"Pre-history"? Am I that old - LOL! Yes, as I said, I know this was the case in many stalls in the old days but I still bet whatever is going on with this random stalling can be attributed to a fuel disruption, maybe even a bad oxygen sensor. I sort of doubt it is a sensor or the computer would find it. There would also be a warning before stalling out such as a reduction in speed and get up and go ability.

Another thing, notice this problem is seen only in the gas engines where condensation can occur. The detection of even a little water in a modern gas engine that is not set up just so can cause a stall, or knocking at least. Diesel motors on the other hand never had this kind of "lock" out problem. It is the nature of gas, not diesel, which can have other similar but unrelated stall problems.

If it is not "vapor lock" per se, or at least as we knew of it back in "pre-history", it is the modern day equivalent, whatever that might be called these days. Anyway, my guess is as good as any I suppose. I'll be anxious to see what the Mercedes technicians find.

katiesdad7

In the words of the late "Scotty" from star trek. "The more they complicate the plumbing the easier it is to stop up the drain."

DMan

I don't think anyone has reported it here yet, so I figure I'll throw in my dealer's $0.02. My dealer here in SoCal says it is an EIS problem (electronic ignition switch). They said they thought it was the fuel pump and sensors in the past as well, but the problem persisted. One of their most problematic ML customers had the new EIS installed and has not had a problem in 3 months. So here's hoping this is the right fix. I got mine done today...so we'll see if it solves the problem.

TundraRoads

I'm wondering if it's cold weather specific. I think all of our stalls happened during cold or cooler weather, none since it warmed up. It's possible that for me this is purely coincidence though. Two requirements for stalling seem to be driving fairly fast for at least 5 or 10 minutes and then coming to a full and complete stop (not a California stop). I'm not sure I've done this much recently either so our lack of stalls could be not meeting these requirements. Or could be warmer weather. Or could be just that it's a temperamental Benz. Others?

mbuster25

Folks,
Anyone know if the random stalling has a fix? I'm about to buy a ML350 and this does concern me. Also, the other day, drove by a new disabled ML350 and was wondering if it was because of that too.

Thanks.

TundraRoads

No known fix yet as far as I'm aware. Everybody I know who's had the problem has not seen it since the weather warmed up. My guess is we'll start to see a rash of them again about Oct/Nov.

trident9440

My ML350 was stalled again yesterday evening. Now I can tell the details about this stalling issue: after drive off the freeway, you stop at a stop sign, wait at least 5 seconds, the engine will stall. To restart the engine, you have to pull the key out, put the car in the parking position. reinsert the key, restart the car as usual.

One more thing I need to point out here is, the engine does not stall every time. However, if you drive off freeway, stop at the stop sign for 5 seconds, you sometimes will feel suddenly a lot of extra shock. then the shock will stop, during this time, you can monitor the engine RPM meter, usually for a full stop, the speed should be at 800-900 RPM. After the engine shock, you will see the RPM drop down to half of that speed.

This is just my observation. Thanks for everyone sharing the info.

shortspark

In a previous post you indicated you would take the video you made of the stall to the service dept. If you did, what did they say?

frtdog

First of all I must admit that because of all the posts on this subject I merely skimmed most of them so i hope I am not being redundant. This is a guess but doesn't some of the ML's made for other countries have that "Eco" (?) feature that shuts down the engine when you stop for a light or a stop sign? If so the wiring (software) is probably in there somewhere just not connected. As the engine control is basically one big computer maybe that "Eco" feature is somehow causing the problem.

trident9440

MB admitted this issue after I showed them the video. However there is still no fix yet.

katiesdad7

You are 100% correct. But if you tell them of a concern then they should try to find out what is wrong. But MB just goes by codes. If no code then no fix. They tell you they can't reproduce it and to them its not a problem. I told them of a bang from the rear end. They said they couldn't reporduce it and didn't go any further. I would have thought they would at a minimum put it up on the lift and take a look under the vehicle. But no.

So my concern is that if the computer is the problem, like in the early rough running of the diesels, then they won't even try to fix anything. To much emphisis put on the computer that was programed by MB.

ShawnH

I too have a 2012 ML350 and it is currently at Fletcher Jones in Newport beach (and has been for a week) for this exact same problem, and this is the 2nd time I have to take it in. They cannot figure out what the problem is and now Germany is involved. They were able to capture some of the codes but it's still stalling. The car is brand new and has spent as much time at the dealership than it has in my garage. I paid for a fully loaded ML and I'm driving a bottom line C class loaner. I love my ML but I am ready to hand them the keys.

katiesdad7

Maybe its time to force their hand and show them the lemon law card.

trident9440

agreed