Mercedes Benz repair: illustrated help, haynes manual, autozone

Question
Hi, I have an 86 300E, I am looking for a site or forum with illustrations and/or help for repairs.  I bought plugs, wires, and a fule filter and need to do these myself,I can't afford the labor charge and am pretty good with cars - just want to make sure I don't mess this up.  Please help me do these 3 things or refer me to a site that can.

Answer
Actually, the 86 300e has a pretty simple engine to perform a tune up like that on. The best thing to do is buy a basic service manual and it will contain all diagrams needed as I presume you are referring to the ignition wire schematic. Unless the cap has been replaced with an after market unit, it should have cylinder numbers stamped on it. You should really pick up a manual (even a Haynes manual at autozone will have the schematics you will need for about $20).