Random Stalling in 2012 ML
I called the dealer after the first time and he said it could be "bad gas". When I said I've been using the same station for years of several cars without ever having this happen, he then suggested I use the keyless button to start the car (prior to that I was using the actual key). He said if the key should come loose - even for a split second - then it would shut off the engine. As this sounded more plausible then "bad gas", I re-installed the ignition button. Everything was fine and I forgot about the stall until it happened again today!!!
Does anyone have any ideas on how to correct this? Without the "check engine" light on, I was told it would be very difficult to determine the cause. Needless to say I am not too happy. This is my first Mercedes and I didn't expect to have this kind of problem. Thanks very much.
I actually saw a post from another user who had the same issue. This happened to me when I used the key AND when I used the button to start the car. Since I've driven a lot in the last 5 weeks AND I've made numerous traffic light stops, this is a relatively rare occurrence. Could this be an issue with the engine or perhaps the key/button? In any case, it's extremely annoying when it does happen.
A shop SDS scan should easily tell your dealer what the problem is, so that they can correct it.
It is NOT normal, and could be as minor as a electrical connection - but the scan will be most helpful since something is being recorded.
This should not be a "rare" occurrence - this should be a "non" occurrence.
There has not been any shop bulletin/wire on this issue - so forgetting what other post from some other guy somewhere for the moment - please get your ML into a MB dealer for diagnosis and fix (doesn't even have to be the dealer you bought the ML from) so you don't keep agitating yourself.
If you need a loaner, best to call ahead and schedule...
Call the dealership tmrw and speak with the Service Manager - random stalling on a new 2012 ML is a hot priority, it's a safety issue - tell him "safety" and then tell him "the Best or Nothing" - or call Roadside/mBrace.. frack this dealer up, that dealer's judgment call is not right at all in MB's eye's..
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I've gone about 400 miles since the last "stall" and it's been on the highway and city - no problems. I will post any updates on my situation.
Thanks.
"Bad gas" is only bad if you car doesn't run and likely contains a lot of water. Otherwise, gas is gas.
Thanks.
Last edited by racingpro100; Jan 9, 2012 at 10:04 PM.




I've already put on another 1k miles since I had the 2nd "stall" (I put it in quotes because I'm not sure if it was a real engine stall OR if it actually just shut off due to electrical or some other "key"->car issues). The car rides great and I intend to bring it to the dealer should I encounter another "stall".
But if others are experiencing this issue and notifying their dealers, I would hope MB does see a pattern and starts to address this issue. It can't be limited to the few of us on this message board. I guess the car is still so new that there aren't enough of them on the road (hence why it's not a good idea to buy a 1st yr model).
I notice that you're in NYC (as I am too). Did you get your ML at Silverstar by any chance?







