Thanks for the speedy reply, pesuazo!

Questions:
1) Which plugs are the best replacements? (I know copper-core is preferred, but confused as to the correct Bosch part number to order.)
2) What is the correct gap spec for the replacement plugs?
3) Is there a proper torque spec for tightening the plugs?
4) You recommend use of antiseize on the threads--are there any heat issues that need to be addressed here?

Sorry so detail-oriented, but I've never done this before and want to get it right the first time...

Regards.

__________________
Eric

1991 560SEL-Euro (214,000 miles)
1989 420SEL (Retired from daily use at 325,000 miles; Use as donor vehicle)