i have a 98 ml320. heres the situation. car starts fine....runs for about 10 minute.... as i idle. it stallls....wont start again. i have to wait about 30 minute for it to cool down a bit. then it starts again,

so far.
dealer replaced.
fuel pump, maf sensor, starter relay, ignition switch

what have i found out.
check engine light comes on,
has 2 code.
fuel trim malfunction bank 1
fuel trim malfunction bank 2

looked at long term fuel trim. + 20%

i was told the fuel filter could cause it also.

but my biggest question is, how come everytime i wait for 30 minutes, it would start again,.
btw, i thk its fuel problem..
when it wont start, if i spray starter fluid in the intake it would want to start, until i stop spraying it,

i havent been able to check fuel pressure or injector yet. any helkp would be appreciated. thanks you very much,

so far, i have spent over $2000

 

Crank position sensor?

 

yes, can be CPS or fuel filter.

 

HELP!!! I am not sure were to start my trouble shooting....I have a 1999 ML430 and I have a similar problem. The car starts and after running and warming up for a while it would shut off. After waiting for 20 minutes or so it would start up again. There are no trouble codes / check engine light, etc. Car has approx 63,000 miles and I am not sure of the history of the car.

I have a few questions:

1. Would the crank position sensor cause the car to stall while driving or only prevent it from starting?
2. Not sure if a fuel system problem would cause the car to stall and than restart once sits for 20 minutes...so I would only begin to guess this is an electrical problem???
3. Would the Air Pump - Sencondary Air system cause the car to run irregular / shut off? I had an air pump issue prior to this. But car does run fine...just dies.

 

Changed the CPS. All seems to be fine now. Took approx 1 hr. and alot of saved time and money troubleshooting.... Easy to do ...thanks to this forum.

 

My ml 350 is maybe starting to have this same problem. Was there a vibration at idle and then a stall. No stalling for me yet but it seems like it is about to at idle then everything is fine after going again. A vibration occurs also. Only happens in morning about 10 - 30 minutes after start.