I'm posting this a I can't, through seach, find a similar situation. My wife's ML will start and run fine and then go through a period where it either won't start or will start but stall out after a few miles.

The check engine light came on a couple of weeks ago and and I replaced the MAF/MAS as I'd had a similar situation in the '97 E320. The check engine light went out and things were grand. Until yesterday when it died, the check engine light came on and we spend five (as in 5) hours waiting for AAA, but that's a whole 'nother story.

I don't think this is a key sitation or a CPS issue, but will defer to the pros here.

Your input is greatly appreciated.

Thanks,

 

sounds like a crank sensor?