hello, so yesterday my c230k '03 model started giving me some trouble (loosing power at stop lights etc) so i took it for that engine computer test because the check engine light was on. the guys there told me 2 of the cylinder's pistons weren't working and they said it might be because of the spark plugs or the wiring. so i was just wondering if u guys have any ideas on what might be wrong with it?

and if you could give me some tips on how to change the spark plugs it would be awesome

 

check the spark plug holes for oil in them before you take out the plugs. make sure the wires are connected to the spark plugs too. could maybe have oil on the mass airflow sensor. fuel pumps or fuel sending units going bad.

 

ty more suggestions are welcomed guys

 

What were the codes that the OBDII test on your car showed? That's what tells you what is going on with the car. You did have it scanned for codes, didn't you? Give me the codes and I'll tell you what they refer to. You can go from there. If your car needs spark plugs, I can help you if you want to do the job yourself.