Here are some questions I have about the distributor cap/rotor in the M103 engine (300E):

Is the distributor cap removed when the head gasket is replaced? I've got a minor miss at idle after the head gasket was replaced. Otherwise the engine runs perfectly.

Is there a recommended mileage where the cap and rotor should be changed?

There seems to be a lubricant that is used with the cap/rotor. How is this used?

Is there a Web Site where servicing the distributor is discussed?

Thanks in advance,
Bud