Car has 195K. After the code came on and the car started misfiring, I replaced plugs with Bosch copper (properly gapped at .032) and Bosch wire/connector set, but code for cylinder 3 remains. I'm suspecting a coil, but the last time I had a coil go bad the car was extremely lumpy and had to be nursed home. It's just *slightly* rough this time.

I'm thinking of moving the coil and seeing if the problem follows. Any thoughts?

Thanks in advance!

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08 W251 R350
97 W210 E320
91 W124 300E
86 W126 560SEL
85 W126 380SE Silver
85 W126 380SE Cranberry
79 W123 250
78 W123 280E
75 W114 280

Sounds like a good idea.

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Jim

Clear all of your codes to baseline it. Then drive the car a bit.

Doesn't pulling codes tell you WHICH coil pack it would be? I recently had a coil pack on my wife's E320 wagon (1995) take a dump, and I pulled blink codes using the home-made blink code reader, and it told me exactly which pack it was (cylinders 2/5). Ordered a new one for $65 and 30 minutes later all good.

Starting over Christmas break, the car had some difficulty starting after not being run for 2-3 days, but generally ran fine once I got it started. Finally one day in mid-Feb my wife called me to tell me she was a mile away and the car was running extremely rough, almost dying at stop lights. She got it home and I immediately pulled codes, and found the culprit. A bad coil can have varying symptoms.