I have a 2003 ML 320 and the engine light goes on and off.
The car stalls when the light comes on. I took it to three mechanics:

CODES: P2050 Misfiring damages to TWC P0300

P2051: Misfiring Cylinder 1 damages to TWC

The codes for the cylinders fluctuates as sometimes its cylinder 1-4-6-3 etc..

ONE mechanic said that the injectors were not getting enough pulsation so the ECU unit should be changed.

The other TWO mechanics said to chnage the spark plugs, and ignition wires which I did , but the problems still exists.

WHAT SHOULD I DO ?? Change the ECU unit or Engine harness wire or what ??

Please advise ?

Thanks!