How to: Change your spark plugs *Video* with part numbers/tools list, etc
Thread Starter
Banned
Joined: Nov 2012
Posts: 331
Likes: 9
550HP+ ///AMG CL55 Kompressor, Ducati 916bp, Yamaha R1 WSBK replica
How to: Change your spark plugs *Video* with part numbers/tools list, etc
Thought some may find this useful. Sorry my camera was in low resolution mode when I filmed it 
Thread Starter
Banned
Joined: Nov 2012
Posts: 331
Likes: 9
550HP+ ///AMG CL55 Kompressor, Ducati 916bp, Yamaha R1 WSBK replica
Makes a feel-able difference, at least it did for my car. The slight idle stumble is completely gone, and the engine is smooth as glass at idle!
MAKE SURE to push in the metal plug boots all the way until you hear the click sound. It takes quite alot of force to do so, but if you don't then they will not seat correctly.
MAKE SURE to push in the metal plug boots all the way until you hear the click sound. It takes quite alot of force to do so, but if you don't then they will not seat correctly.
MBWorld Fanatic!
Joined: Mar 2008
Posts: 3,632
Likes: 150
C63s Cabriolet, BMW M4, Civic
The hardest part of the whole procedures is how to remove the plugs boot without the right tool. Most of us used the open end wrench to pry out the plug boot. What did you used?
Thread Starter
Banned
Joined: Nov 2012
Posts: 331
Likes: 9
550HP+ ///AMG CL55 Kompressor, Ducati 916bp, Yamaha R1 WSBK replica
My hands. On the left side, the very last plug I used a vice grip/lock jaw. That was the only one I couldn't get undone without a tool. My trick was to twist and try to spin the plug boot, and that way they come off easier.
MBWorld Fanatic!
Joined: Nov 2001
Posts: 6,340
Likes: 22
From: Southern California, USA
2003 CL55 AMG
Labeling the plug boots isn't entirely needed.
If you look at the heads, you will see Mercedes has given us a nice alpha diagram (A, B, C, D, E). The plug boots have this letter on them to indicate location.
Also, if your going through the process of changing plugs, test your resistance on the plug wires. When I changed mine at 100,000 miles, the resistance on some of the plug wires was high.
I ended up replacing the enter wire set as well.
Also, a little dab of DI-electric grease on the spark plug or smeared on the inside of the boot will help ease of installation as well as DE-installation the next time you need to pull the boot.
I also use a dab of anti-size on the spark plug threads.
If you look at the heads, you will see Mercedes has given us a nice alpha diagram (A, B, C, D, E). The plug boots have this letter on them to indicate location.
Also, if your going through the process of changing plugs, test your resistance on the plug wires. When I changed mine at 100,000 miles, the resistance on some of the plug wires was high.
I ended up replacing the enter wire set as well.
Also, a little dab of DI-electric grease on the spark plug or smeared on the inside of the boot will help ease of installation as well as DE-installation the next time you need to pull the boot.
I also use a dab of anti-size on the spark plug threads.
Last edited by awiner; Dec 7, 2012 at 01:50 PM.
Trending Topics
MBWorld Fanatic!
Joined: Jul 2012
Posts: 1,254
Likes: 171
2002 CL500 to CL55 conversion
2006 Cl500- nidzanyo is a royal douche and has been banned for a long time. might be able to get a hold of him through his youtube channel
also there are different styles of plug wires, there's a Beru brand which is also OEM but the 16mm mercedes spark plug wire tool wont work. hope this helps someone before they get upset at the tool they ordered, and wont work...
also there are different styles of plug wires, there's a Beru brand which is also OEM but the 16mm mercedes spark plug wire tool wont work. hope this helps someone before they get upset at the tool they ordered, and wont work...
MB World Stories
The Best of Mercedes & AMG
Manual Mercedes? 6 Times Sindelfingen Let Drivers Have All The Fun
Verdad Gallardo
Mercedes SLR McLaren 722 S Is Extremely Rare Example Modified by McLaren
Verdad Gallardo
8 Classic Boxy Mercedes Designs That Have Aged Like Fine Wine
Verdad Gallardo
Flawlessly Restored Mercedes 190E Evo II Heads to Auction
Verdad Gallardo
Electric Mercedes C-Class Unveiled: 11 Things You Need to Know
Verdad Gallardo
Mercedes EQS Gets A Major Update: Everything You Need to Know
Verdad Gallardo
5 Underrated Mercedes-Benz Models That Don't Get the Love They Deserve
Verdad Gallardo
Mercedes 300D Has Pushed Well Past 1 Million Miles and It Ain't Stopping
Verdad Gallardo
