Date registered: Oct 2012
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1994 E320 Ignition Code 7
My wagon began losing 2 cylinders. I put brand new plugs in it and the problem went away, firing great on all six cylinders for two days. The Code 7 cleared out. The coils appeared to be fine.
Then it all came back so i went to a Mercedes shop where they diagnosed a bad Engine Control Module. They put a new one in and cleared the codes and it worked great until i neared home, now it is losing power again but not in the same way, certainly not 2 cylinders.
Upon start the car runs on six cylinders for 10 minutes then begins to lose a bit of power , rough idle.
I am thinking of replacing all the plugs again this time with new spark plug wires.