I have a Mercedes Benz 2005 C220 with P0201and P0204 - Injector 1 & 4 circuit open

[LesAUST71]

Hi everyone my name is Les I am in Australia I am a auto sparky.
I have a Mercedes Benz 2005 C220 which my mate purchased(yep a love job) with codes P0201 & P0204 which I know they are Injector open circuit issues
The car cranks over then tries to fires for a few seconds then shuts down I am going to change the Injector plugs not 100% sure thats is really the fault.

I also purchased a LED OEM Plug tester the LED when placed on all 4 flash the same?. so it's not like 1 and 2 are dead or open circuit I find.

I have tested myself and so has the Injector place we we thought we would get that side done first so we no chasing our tail.
My test on the 4 injectors I get a reading of 0.7ohms with the plug out on all 4? I am not sure what they need to be when good.
I was going to move injector 1(Error) to 2(Good) around see if I get that error move from P0201 to read then P0202

If anyone could help me out that would be great or let me know what the injectors for my model should read and where the ECU is located so I can test the cables bak to the injectors

 

[DREAMER NO2]

Les did you sort this problem out ? As a rule 2 cylinder fault will be a faulty ECU