I'm doing an ignition tune-up this weekend...
 

I've noticed that my 1996 E320 has been idling a little bit rougher than usual and I haven't changed the plugs and/or wires since I bought it a few months ago. I know this car takes Bosch F9DC0 copper plugs, but are Bosch ignition wires acceptable as oem replacements?

Also, do '96 M-104 equiped E320's commonly suffer from the same clogged EGR tube issues that earlier models did?

Chris

I just noticed that my owner's manual specs Bosch F9DC0 spark plugs, but Phil at Fastlane is calling for Bosch F8DC4's. Which is best for my application?

Chris

F8DC4 replaces the original. I would try just plugs and the plug connectors under each coil.
All 104 engines had the egr tube problem.

http://catalog.eautopartscatalog.com/mercedesshop/sophio/quote.jsp?clientid=catalog.mercedesshop&cookieid=1W70PZW4N20Q01NV8J&baseurl=http://catalog.peachparts.com/&partner=mercedesshop&year=1996&product=F1010-84561&application=000357357

Chris, F8DC4's work fine in my cars with 104 engines.