I am doing a tune-up on my 2001 Mercedes C240 (which has a rough idle and 98k mi).

It's my understanding after researching (a lot ) I need:
1. 12 spark plugs
2. 12 wires
3. left + right valve cover gasket

Can you guys please confirm that the parts I have chosen will fit properly and are the best choice? I only want to use OE parts.. Also, please let me know if I will need any additional parts/tools. I wanna get this order in!

Mercedes Benz C240 Bosch Spark Plug Wire 2001 - 2005 (12)
p/n: W0133-1840551 $135.33

2001-2005 Mercedes Benz C240 - Bosch Spark Plug
Direct OE Replacement FR8DPP33+
p/n: W0133-1826683 $7.95 (X12 $95.40)

2001-2005 Mercedes Benz C240 - Victor Reinz
Passenger Side Valve Cover Gasket - Direct OE
p/n: W0133-1632508 $17.95

2001-2005 Mercedes Benz C240 - Victor Reinz
Driver Side Valve Cover Gasket - Direct OE Replacement-
p/n: W0133-1632374 $17.95

This comes to $267 shipped from thebenzbin com
The same exact parts come to $247 at partsgeek com

Also, anyone know which vendor is more reliable

 

i just did the plug change not too long ago and that's the exact same plug i used(recommended by dealer). I got mine from checker's for about 65 dollars for all twelve.

 

oh wait my mistake i didn't get it from checkers, i got it from http://www.autohausaz.com