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

btw. i have notice that it has gotten worse and worse.
and it been happening since march