Thanks for the tip Steve. I will take it in to my mechanic as I don't have a multi meter and ask him to test the Lambda out. Any ideas about the oil in the filter housing, or is a little normal? I don't remember seeing any in the past.
Arron, what were your other symptoms when the chain skipped the tooth? Was the idle always rough? Mine is pretty much only when cold.
1995 E420 - retired
1986 420SEL - retired