Notices
W211 AMG Discuss the W211 AMG's such as the E55 and the E63
Sponsored by:
Sponsored by:

Spark Plug Comparison

 
Old 09-07-2011, 09:39 PM
  #1  
MBWorld Fanatic!
Thread Starter
 
Join Date: Jan 2007
Posts: 1,358
Likes: 0
Received 1 Like on 1 Post
ML550
Spark Plug Comparison

In preparation for an upcoming spark plug refresh for my car this weekend, I decided to survey in advance the most well-known options. Starting point was the BoschUSA auto parts website, with its "Vehicle Finder." Here's what Bosch says is available for a 2005 E55:



Here's the well-known FR6MPP332 plug:



And here's Bosch's new Iridium "9652" plug:



Next is the MB factory spec NGK ILFR6A:



And last is the LFR6AIX-11 IridiumIX plug:



The NGK website says this about the standard MBUSA plug:



And praises the "IX Iridium" plugs:



Here's a shot showing the plugs side-by-side:




Oops!!! That new Bosch Iridium plug (9652) that the Bosch website says fits our engine is the "short reach" variety that has been discussed many times before. In a nutshell, the plug won't extend sufficiently into the combustion chamber of the head. So I'm passing on this one.

With the hype at the NGK website, I bit and decided to try their "IX Iridiums." My car's engine isn't modded enough to justify a colder heat range, so I'm going with the NGK LFR6AIX-11 plugs. At about 6 years and 85K miles later, my engine is undoubtedly ready for a set of fresh plugs. Should be fun; the wifey will be out of town so I'm down for some quality time working on the beast - without interruption(s).
komp55 is offline  
Old 09-07-2011, 10:18 PM
  #2  
PLATINUM SPONSOR
 
shardul's Avatar
 
Join Date: May 2008
Location: Houston
Posts: 11,427
Received 163 Likes on 138 Posts
2003 W211 E55, 2003 W220 S600
it is a easy job, make sure you have a swivel spark plug socket. Use anti-seize compound on the new plugs.
Remember lead from top connection of the coil goes to the first plug
__________________
E55
Preferred Contact method PM or email [email protected]
Instagram @shardul_amg @ultimatepd
NO TEXT MESSAGES THEY WILL NOT BE REPLIED TO
PLEASE DO NOT SEND MULTIPLE EMAILS /PM WITH THE SAME SUBJECT MATTER. ALL EMAILS / PM WILL BE RESPONDED TO WITHIN 24 HRS.
shardul is offline  
Old 09-07-2011, 11:46 PM
  #3  
MBWorld Fanatic!
 
pearlpower's Avatar
 
Join Date: Oct 2009
Location: Southern California
Posts: 2,824
Likes: 0
Received 5 Likes on 4 Posts
E55 w/ goods, Z32 Project underway
I always run those NGK Ir plugs. Never an issue.
pearlpower is offline  
Old 09-08-2011, 06:42 AM
  #4  
MBWorld Fanatic!
Thread Starter
 
Join Date: Jan 2007
Posts: 1,358
Likes: 0
Received 1 Like on 1 Post
ML550
Originally Posted by shardul View Post
it is a easy job, make sure you have a swivel spark plug socket. Use anti-seize compound on the new plugs.
Remember lead from top connection of the coil goes to the first plug
Thanks, I shoud have done this when I had the headers out - but I didn't.

Does anyone still use a little dab of dielectirc grease in the plug wire boot?
komp55 is offline  
Old 09-08-2011, 08:38 AM
  #5  
MBWorld Fanatic!
 
Join Date: Nov 2008
Posts: 1,669
Received 10 Likes on 10 Posts
2006 E55, 2012 Bentley Continental Supersports Convertible, 2014 Kia Sorento SXL AWD
What is a good source for the NGK LFR6AIX-11 plugs? I will be doing these in a couple of months... Anything better than Amazon.com at $7.55 per plug with free super saver shipping?
06E55 is offline  
Old 09-08-2011, 08:45 AM
  #6  
MBWorld Fanatic!
 
Join Date: Nov 2008
Posts: 1,669
Received 10 Likes on 10 Posts
2006 E55, 2012 Bentley Continental Supersports Convertible, 2014 Kia Sorento SXL AWD
Does the gap vary by the type of plug used? If you go to NGK's website, it says the gap is 0.039 for a 2006 E55... I always thought it was 0.032????
06E55 is offline  
Old 09-08-2011, 08:53 AM
  #7  
MBWorld Fanatic!
 
Join Date: Nov 2007
Location: USA and CA
Posts: 1,314
Received 5 Likes on 4 Posts
G350 Bluetec
I threw in the towel

And bought the MB NGK plugs for the M113k engine for my 05 CL55. I have found an increase in gas mileage since the change at start and on the highway. The original MB NGKs in the block were in surprisingly good shape, none the less.

At the time the 9652s were not available and the over the counter NGKs seemed subtly different in the insulator as the pics show. I do not understand what difference it makes, so I bought the Parts from MB and paid the premium.

Thanks for the pics. I suggest you repost this (or whatever the forum rule is) in the Tech Thread for the M113K, please.

This thread seems definitive. Thanks Komp55 for the great work!

Last edited by grane; 09-08-2011 at 09:07 AM.
grane is offline  
Old 09-08-2011, 09:52 AM
  #8  
MBWorld Fanatic!
Thread Starter
 
Join Date: Jan 2007
Posts: 1,358
Likes: 0
Received 1 Like on 1 Post
ML550
Originally Posted by 06E55 View Post
What is a good source for the NGK LFR6AIX-11 plugs? I will be doing these in a couple of months... Anything better than Amazon.com at $7.55 per plug with free super saver shipping?

Yes, I sourced the NGK LFR6AIX-11 plugs from here:

http://ngksparkplugs.ecrater.com/p/2...idium-ix-spark

He also stocks the colder LFR7AIX-11 plugs as well. Very fast shipping; all in with shipping was just under $108 for all 16 plugs needed.
komp55 is offline  
Old 09-08-2011, 10:34 AM
  #9  
MBWorld Fanatic!
 
Join Date: Jun 2010
Location: Puerto Rico
Posts: 4,173
Likes: 0
Received 2 Likes on 2 Posts
2005 E55 AMG
I use the colder LFR7 and it works wonderfully.
GT-ER is offline  
Old 09-08-2011, 11:32 AM
  #10  
MBWorld Fanatic!
 
Join Date: Jan 2009
Location: Northern VA
Posts: 3,159
Likes: 0
Received 8 Likes on 7 Posts
W211
komp55

whats the mileage you have on your car? I'm at 60k and will probably do this when temps cool down a bit in Oct.
novae500 is offline  
Old 09-08-2011, 12:59 PM
  #11  
MBWorld Fanatic!
Thread Starter
 
Join Date: Jan 2007
Posts: 1,358
Likes: 0
Received 1 Like on 1 Post
ML550
Originally Posted by novae500 View Post
komp55

whats the mileage you have on your car? I'm at 60k and will probably do this when temps cool down a bit in Oct.
Mine's at 85K with its original plugs.
komp55 is offline  
Old 09-08-2011, 01:38 PM
  #12  
MBWorld Fanatic!
 
Join Date: Jan 2009
Location: Northern VA
Posts: 3,159
Likes: 0
Received 8 Likes on 7 Posts
W211
thanks for the info. Wondering if i should hold off and wait, but it is 6yr old now and the maintenance interval says 5yr/100k miles i believe.
novae500 is offline  
Old 09-09-2011, 01:50 PM
  #13  
MBWorld Fanatic!
 
Join Date: Nov 2008
Posts: 1,669
Received 10 Likes on 10 Posts
2006 E55, 2012 Bentley Continental Supersports Convertible, 2014 Kia Sorento SXL AWD
Can anyone verify the correct spark plug gap? or does it vary by spark plug brand?
06E55 is offline  
Old 09-09-2011, 02:55 PM
  #14  
MBWorld Fanatic!
 
kompressede's Avatar
 
Join Date: Oct 2009
Location: NY
Posts: 1,441
Received 9 Likes on 8 Posts
Sold - 05' E55
Thanks for the write up - A lot of info on plugs.

The car runs fine, I just plan to change the plugs this fall because the plugs are 6yrs old.
kompressede is offline  
Old 09-09-2011, 03:09 PM
  #15  
Former Vendor of MBWorld
 
Join Date: Oct 2008
Location: Long Island, NY
Posts: 1,181
Likes: 0
Received 1 Like on 1 Post
Whatever we're tuning!
Originally Posted by kompressede View Post
Thanks for the write up - A lot of info on plugs.

The car runs fine, I just plan to change the plugs this fall because the plugs are 6yrs old.
Especially if you are making another 150rwhp!


TTMotorsports is offline  
Old 09-12-2011, 05:11 PM
  #16  
Junior Member
 
Join Date: Aug 2011
Posts: 51
Likes: 0
Received 0 Likes on 0 Posts
2003 E55 AMG
Originally Posted by 06E55 View Post
Can anyone verify the correct spark plug gap? or does it vary by spark plug brand?
I have my manual in front of me (2003 E55) and it calls for .039 gap. Hope this helps.
tcoleman is offline  
Old 09-12-2011, 05:17 PM
  #17  
MBWorld Fanatic!
 
jmb614's Avatar
 
Join Date: Jan 2011
Location: West
Posts: 1,229
Received 14 Likes on 14 Posts
E55 AMG
I went a step colder to the LFR7's from NGK as well, even prior to adding mods as at the time of installation I knew I would be adding more boost. Never had an issue. I was told that the NGK's should not be gapped, as they are supposed to come pre-gapped to spec.
jmb614 is offline  
Old 11-08-2011, 09:28 PM
  #18  
Member
 
Join Date: Feb 2011
Location: Perth, Australia
Posts: 217
Likes: 0
Received 0 Likes on 0 Posts
E55 AMG
Why is it that the NGK website is not saying that the 6619 plug is for the E55?
AK-AMG is offline  
Old 11-09-2011, 01:38 AM
  #19  
Member
 
Join Date: Feb 2011
Location: Perth, Australia
Posts: 217
Likes: 0
Received 0 Likes on 0 Posts
E55 AMG
Can someone please confirm that this plug is not the right one and that the NGK plug above is correct.

This is from the JEGs website.
BKR5EIX-11

Thanks
AK-AMG is offline  
Old 11-09-2011, 09:03 AM
  #20  
MBWorld Fanatic!
Thread Starter
 
Join Date: Jan 2007
Posts: 1,358
Likes: 0
Received 1 Like on 1 Post
ML550
This is a link to the NGK website, showing the 6619 as an application for the W211 E55.

http://www.ngksparkplugs.com/part_fi...engineid=31950


So yes, it's definitely one of the correct plug alternatives.
komp55 is offline  
Old 11-09-2011, 06:30 PM
  #21  
Member
 
Join Date: Feb 2011
Location: Perth, Australia
Posts: 217
Likes: 0
Received 0 Likes on 0 Posts
E55 AMG
Thanks for that info.
AK-AMG is offline  
Old 12-14-2011, 05:04 PM
  #22  
Junior Member
 
Join Date: Oct 2011
Posts: 30
Likes: 0
Received 0 Likes on 0 Posts
none
My local dealer is saying his "book" shows 3.0 hours to replace the plugs on my 2006 E55. Is that true? What has to happen that it takes 3 hours?
tjohnson11 is offline  
Old 12-14-2011, 05:43 PM
  #23  
MBWorld Fanatic!
 
CharlyE500's Avatar
 
Join Date: Dec 2008
Location: Socal, Chino
Posts: 4,134
Received 23 Likes on 22 Posts
E55 2006 / E55 2000 / White Odyssey
Originally Posted by tjohnson11 View Post
My local dealer is saying his "book" shows 3.0 hours to replace the plugs on my 2006 E55. Is that true? What has to happen that it takes 3 hours?
It should not take more than 1 hour. The other 2 hours they take coffee break and enjoying road testing your car.
CharlyE500 is offline  
Old 12-14-2011, 05:53 PM
  #24  
Senior Member
 
MrKool's Avatar
 
Join Date: Oct 2006
Posts: 290
Likes: 0
Received 0 Likes on 0 Posts
I just ordered the spark plugs (ILFR6A) from amazon. Total was $154.80 delivered to my door. I will be replacing them this weekend. Don't expect it to take more than a couple of hours. I called the stealership just to get an estimate and was quoted below.

Parts: $292.00
Labor: $520.00

Total: $812.00

Not only that, I also ordered the supercharger and the v-belt from primeparts. Cost me total of $88.00 delivered. Dealer quoted $314.00 total.

So if I went with the dealer, the total cost would've been $1126.00. BIG Thanks to mbworld AND the folks that have posted the DIYs, it'll only cost me $242.80 and a few hours on Saturday.

Last edited by MrKool; 12-14-2011 at 06:02 PM.
MrKool is offline  
Old 12-14-2011, 06:19 PM
  #25  
Senior Member
 
Join Date: Feb 2004
Location: Gulf Coast
Posts: 335
Likes: 0
Received 0 Likes on 0 Posts
2006 E55 & 2009 Audi S5
My indy replaced mine last week with ngk laser iridium and also did the motor mounts and transmission mount for a total of $760 parts and labor. Didn't think it was too bad and was glad to give the business because he was very appreciative.
jddumas is offline  

Thread Tools
Search this Thread
Rate This Thread
Rate This Thread:
You have already rated this thread Rating: Thread Rating: 0 votes,  average.

Quick Reply: Spark Plug Comparison


Contact Us - About Us - Archive - Advertising - Cookie Policy - Privacy Statement - Terms of Service

© 2019 MH Sub I, LLC dba Internet Brands

We are a participant in the Amazon Services LLC Associates Program, an affiliate advertising program designed to provide a means for us to earn fees by linking to Amazon.com and affiliated sites.
 
  • Ask a Question
    Get answers from community experts
Question Title:
Description:
Your question will be posted in: