'98 C280 Spark Plug Questions
 

Concerning a '98 C280 with V6:

First, let me apologize if I missed anything in the archives on this. I have looked through them and there appears to be LOTS of opinions on what kind is correct, and many misreferences to other engines and the like. I know asking this question is almost like asking an oil question! :eek:

First: What is the correct Bosch OEM number for the 12 plugs this engine needs?

Second: I checked at FastLane for the plugs and they show the "multi-tipped" platinum models. I had read that I should NOT use mult-tipped OR platinum. Are they hosed on this fact?

Edited Later: I went back and discovered that FastLane shows two different pictures. The first one shows the multi-tip, and the second one shows the standard "one tip" plug for the same part number! Just an oversite, I guess.

Third: How many lbs. do I torque the plugs at if they are washered plugs?

Fourth: What is the correct gap for these particular plugs?

Ok, that's way too many questions at once, but forgive me. I'm one of those darn MB rookies!

Thanks in advance, guys!

Curt

Don't have all the answers on part numbers off the top of my head, but the original plug is a single tip plug (use only that) and the gap should be 1.0 mm.

All your questions answered (well at least some) (caution big downloads):

http://www.bosch.com.au/content/language1/downloads/SparkPlug05_06Catcover.pdf

http://www.bosch.com.au/content/language1/downloads/sparkplugs_passenger_(2).pdf

Note that Bosch don't seem to recommend much for Mercedes other than OEM (and they should know).

Some friendly advice, either get an owners manual for this car or read the one you have. All of the answers to your questions are in the Technical Data section. If you need one I have a spare 1998 W202 owners manual. Send me a PM.
Also, read this thread, especially post #9, http://www.peachparts.com/shopforum/tech-help/142384-99-c280-spark-plugs.html
(BTW, I use the BERU plugs in mine)

Good Luck, Dan

bosch fr8dpp33

This plug is resistive. You need a non-resistive plug. Again, read this thread for more info. Only use a plug specified by MB. The fr8dpp33 is not. http://www.peachparts.com/shopforum/showthread.php?t=142384

fr8dpp33 IS the latest plug recommended by mb. call any dealer and have them look up the part number for any 112/113 motor and it will sub to 003-159-94-03. then ask them to open the box. voila! bosch plug and # FR8DPP33! i read your attachment and it did not have FR8DPP33 in the listing. i have a copy of the latest EPC from MBUSA on spark plugs as of MAY06. see attachment.

Interesting. I don't pretend to know a whole lot about ignition systems. It looks like MB is approving the use of resistive plugs in systems designed for non-resistors. Since these are interchangeable, is there any reason to prefer one type over the other? Performance? Service life? Price? Beru plugs are still available as non-resistor. Is there any reason to choose them over the less expensive Bosch resistor type? I asked my dealer and they use the Berus.
I would like to open the attachment but I can't see it.
Thanks, Dan

not intimately familiar with why the newer one is better but its the one mb recommends so im going with that. i didnt see the attachment either. i thought maybe only others can see it. i went to bottom of post screen to manage attachments. uploaded the file from my computer. dont know what happened. ??????