Hi people,

New member here with a year 2000 C230K that has 64K on it.
Check engine light has been on for some time. Periodically it runs very rough. If I shut off the car and restart the problem will go away for a while. Recently the check engine light started flashing so I guess the issue has become critical.
Had the auto supply store look at codes and got P0170, Po130, P0301, P0302, P0300, P0304.
I have replaced the 4 spark plugs. Thinking about putting in a shot of injector cleaner.
Taking the approach of replacing the easier and cheaper stuff first unless there is a clear culprit here.
Contenders seem to be the MAF, the two O2 sensors, and possible air leak.
Any ideas would be appreciated.

Thanks