Recently completed a tune-up on a 2003 e320. Engine still misfiring. Traced the problem to one cylinder. It appears that I'm not getting power to the coil pack. Help!
MercedesMedic 1 year ago
I would check the wire harness.
That would the first think I would check. Or the connector to the ECU may be loose or corroded.
Also is the coil not getting both positive and negative or just one?