Coils and Spark Plugs Replacement - MBWorld.org Forums



CLS Coupe (C219) Discuss the CLS Coupe.

Coils and Spark Plugs Replacement

Reply
 
 
 
LinkBack Thread Tools Search this Thread Rate Thread
Old 10-16-2016, 11:28 AM   #1
Member
Thread Starter
 
rick hesek's Avatar
 
Join Date: Jun 2014
Posts: 83
Drives: 2009 CLS550
Thanks: 0
Thanked 1 Time in 1 Post
Coils and Spark Plugs Replacement

Hi all,
My 09 CLS550 service interval chart recommends the spark plugs be replaced at 80k miles (or 8 years). No additional replacement interval and the chart goes to 150k miles. There is also no recommended replacement for the ignition coils.
I am going to replace my spark plugs since I am at 120k miles and I wanted to hear what comments I might get from this group.
My inclination is to also replace the coils since their resistance can degrade over time, heat, cold and use.
The car is running well and no indication of a fouled plug or bad coil. I drive this car like it's an F16 fighter jet, only faster.

Thanks,
Rick H
rick hesek is offline   Reply With Quote
Old 10-17-2016, 09:46 AM   #2
Newbie
 
Join Date: Aug 2015
Posts: 4
Drives: Bluetec
Thanks: 0
Thanked 0 Times in 0 Posts
Plugs

On older euro vehicles, I always replace the coils when servicing plugs.
If the plug had evidence of carbon tracking, it will come back if you reuse
the same rubber boot of the coil
localmechanic is offline   Reply With Quote
Old 10-17-2016, 10:41 AM   #3
MBWorld Fanatic!
 
konigstiger's Avatar
 
Join Date: Jul 2003
Location: North Scottsdale, AZ
Posts: 8,160
Drives: '71 Pinto
Thanked 365 Times in 313 Posts
As recommended, plugs/coils. To clarify MB recommends every 80,000/8-years (whichever comes first) so next change would be 160,000/16 years.
konigstiger is offline   Reply With Quote
Old 10-17-2016, 12:02 PM   #4
Member
Thread Starter
 
rick hesek's Avatar
 
Join Date: Jun 2014
Posts: 83
Drives: 2009 CLS550
Thanks: 0
Thanked 1 Time in 1 Post
That is what I figured.
Thank you!

Rick H
rick hesek is offline   Reply With Quote
Old 10-26-2016, 12:23 PM   #5
Member
Thread Starter
 
rick hesek's Avatar
 
Join Date: Jun 2014
Posts: 83
Drives: 2009 CLS550
Thanks: 0
Thanked 1 Time in 1 Post
Done.
I went with NGK plugs (PLKR7A), vs Bosch, due to feedback here. Besides, I have had great success with NGK's in other cars. I went with the Delphi OEM coil.
The job took 1 hour which included pulling all the necessary tools together, checking plug gaps and unpacking new parts. No issues, but I did find all of the original plugs were not much more than hand tight. These were replaced at 80k miles by a local dealer.
Acceleration response has noticeably improved. Engine runs smoother and quieter, also. I'm guessing one or more original coils were degraded. Plus the plugs are tight now.

Rick H
rick hesek is offline   Reply With Quote
Old 12-01-2016, 03:59 PM   #6
Junior Member
 
2006C230V6's Avatar
 
Join Date: Mar 2015
Posts: 24
Drives: 2006 C230 Sport
Thanked 0 Times in 0 Posts
Congratulations on a successful project. It's a good feeling when you've done the work yourself. I decided to go with the stock MB plugs which were $15ea at our local dealership. I understand they are also NGK, but the OEM really is a beautiful plug. It's a shame no one will ever see them after they are installed.
I sat one on my desk at work until I had to install them.
2006C230V6 is offline   Reply With Quote
Old 12-01-2016, 06:36 PM   #7
Senior Member
 
Join Date: Feb 2013
Posts: 428
Drives: 2006 CLS 500
Thanked 1 Time in 1 Post
Quote:
Originally Posted by rick hesek View Post
Hi all,
My 09 CLS550 service interval chart recommends the spark plugs be replaced at 80k miles (or 8 years). No additional replacement interval and the chart goes to 150k miles. There is also no recommended replacement for the ignition coils.
I am going to replace my spark plugs since I am at 120k miles and I wanted to hear what comments I might get from this group.
My inclination is to also replace the coils since their resistance can degrade over time, heat, cold and use.
The car is running well and no indication of a fouled plug or bad coil. I drive this car like it's an F16 fighter jet, only faster.

Thanks,
Rick H
Funny, I was literally about to post this as my car is at around 93k miles and I don't think the previous owner replaced the spark plugs (bought it at around 80k miles). Where did you order your spark plugs from?.. Did you torque them etc? I was looking at ngk but theres so many friggin options not sure what to chose.. There's also the oem mercedes which i am not sure who manufacturers it. Also what is the difference between the resistor style and the regular style plugs. Any other maintenance people do around this mileage like transfluid flush?

Last edited by Dnasty; 12-01-2016 at 06:47 PM.
Dnasty is offline   Reply With Quote
Old 12-01-2016, 06:39 PM   #8
Member
Thread Starter
 
rick hesek's Avatar
 
Join Date: Jun 2014
Posts: 83
Drives: 2009 CLS550
Thanks: 0
Thanked 1 Time in 1 Post
Quote:
Originally Posted by 2006C230V6 View Post
Congratulations on a successful project. It's a good feeling when you've done the work yourself. I decided to go with the stock MB plugs which were $15ea at our local dealership. I understand they are also NGK, but the OEM really is a beautiful plug. It's a shame no one will ever see them after they are installed.
I sat one on my desk at work until I had to install them.
Cool! It sounds like you really like your car. As you should!
I bought my NGK plugs on eBay and spent about $8 each. They retail for @ $15. I have had no issues with NGK in any of my past gas Mercedes. The larger engine cars seem to reject Bosch plugs, for some reason.

Have fun!
rick hesek is offline   Reply With Quote
Old 12-01-2016, 06:51 PM   #9
Member
Thread Starter
 
rick hesek's Avatar
 
Join Date: Jun 2014
Posts: 83
Drives: 2009 CLS550
Thanks: 0
Thanked 1 Time in 1 Post
Quote:
Originally Posted by Dnasty View Post
Funny, I was literally about to post this as my car is at around 93k miles and I don't think the previous owner replaced the spark plugs (bought it at around 80k miles). Where did you order your spark plugs from?.. Did you torque them etc? I was looking at ngk but theres so many friggin options not sure what to chose.. There's also the oem mercedes which i am not sure who manufacturers it. Any other maintenance people do around this mileage like transfluid flush?
I believe there are only 2 spark plug options for these engines. Bosch and NGK. I have had better success with NGK and it goes back to my 2002 S430 (2 plugs per cylinder), 1983 380 SEC and my 1987 560 SEC.
I bought my current plugs on eBay. I think I paid about $8 each which is about half retail.
If you go to the NGK part application site, you will find the correct plug for the CLS500.
https://www.ngksparkplugs.com
I did not torque my plugs. The NGK have a crush ring, which collapses under the end force, and creates a seal. By feel, you can tighten the plug to where this crush ring collapses. There is noticeably more torsion resistance which is when you stop tightening.
Clear?

Rick H
rick hesek is offline   Reply With Quote
Old 12-01-2016, 06:57 PM   #10
Member
Thread Starter
 
rick hesek's Avatar
 
Join Date: Jun 2014
Posts: 83
Drives: 2009 CLS550
Thanks: 0
Thanked 1 Time in 1 Post
Quote:
Originally Posted by Dnasty View Post
Funny, I was literally about to post this as my car is at around 93k miles and I don't think the previous owner replaced the spark plugs (bought it at around 80k miles). Where did you order your spark plugs from?.. Did you torque them etc? I was looking at ngk but theres so many friggin options not sure what to chose.. There's also the oem mercedes which i am not sure who manufacturers it. Also what is the difference between the resistor style and the regular style plugs. Any other maintenance people do around this mileage like transfluid flush?
I believe the earlier CLS500's have different service intervals. Check here again for your specific car. I attached mine here:

Rick H
Attached Files
File Type: pdf Service at Intervals C219 and W211.pdf (2.30 MB, 26 views)
rick hesek is offline   Reply With Quote
Old 12-02-2016, 03:42 AM   #11
Senior Member
 
Join Date: Feb 2013
Posts: 428
Drives: 2006 CLS 500
Thanked 1 Time in 1 Post
Quote:
Originally Posted by rick hesek View Post
I believe there are only 2 spark plug options for these engines. Bosch and NGK. I have had better success with NGK and it goes back to my 2002 S430 (2 plugs per cylinder), 1983 380 SEC and my 1987 560 SEC.
I bought my current plugs on eBay. I think I paid about $8 each which is about half retail.
If you go to the NGK part application site, you will find the correct plug for the CLS500.
https://www.ngksparkplugs.com
I did not torque my plugs. The NGK have a crush ring, which collapses under the end force, and creates a seal. By feel, you can tighten the plug to where this crush ring collapses. There is noticeably more torsion resistance which is when you stop tightening.
Clear?

Rick H
That's pretty cool.. thought i would have to get a special angled torque wrench to do this but this should be a pretty easy job. Their site recommended the NGK PFR5R-11.. wondering why they recommend different plugs for your 2009?

Last edited by Dnasty; 12-02-2016 at 03:52 AM.
Dnasty is offline   Reply With Quote
Old 12-02-2016, 10:11 AM   #12
MBWorld Fanatic!
 
konigstiger's Avatar
 
Join Date: Jul 2003
Location: North Scottsdale, AZ
Posts: 8,160
Drives: '71 Pinto
Thanked 365 Times in 313 Posts
Quote:
Originally Posted by Dnasty View Post
wondering why they recommend different plugs for your 2009
06 cls”500” has 113 engine, 09 cls”550” 273 engine.
konigstiger is offline   Reply With Quote
Old 12-15-2016, 04:28 AM   #13
Senior Member
 
Join Date: Feb 2013
Posts: 428
Drives: 2006 CLS 500
Thanked 1 Time in 1 Post
I just did this... you guys inspired me and my car is at 93k so I figure it's due for it. Car seems to be running gutsier and I notice acceleration improvement, it also sounds better. On the downside I also noticed that oil appears to be leaking from my valve cover gasket mainly on my driver side and the old spark plugs I pulled out had this thick syrupy dark brown gunk on it... is that oil? Guess I found my next job... is it an issue that I put new spark plugs in when there's a valve cover gasket leak or should I just aim to get this done soon. It's not a huge leak but it's definitely leaking. I also noticed more of this brown syrupy gunk on the engine cover as well.. not really sure what it is.
On a side note i'm looking at an email I got from benz dealership they wanted $867 to change spark plugs... hah.

Last edited by Dnasty; 12-15-2016 at 04:32 AM.
Dnasty is offline   Reply With Quote
 
 
Reply

Related Topics
Thread Thread Starter Forum Replies Last Post
Car stalls while moving Jmichael55 SL-Class (R129) 10 11-17-2016 06:46 AM
Ignition transformer experiences? ZephTheChef S-Class (W220) 11 09-04-2016 08:16 PM
Driving Impressions After a Few Weeks bizinsider E-Class (W213) 11 09-04-2016 11:02 AM
Wanted to buy stock wheels 2004 SL500 plasticweld Wheels and Tires 2 08-30-2016 08:55 PM
Car won't start - I'M DESPERATE Ferdie C Class (W205) 1 08-28-2016 12:34 PM



Currently Active Users Viewing This Thread: 1 (0 members and 1 guests)
 
Thread Tools Search this Thread
Search this Thread:

Advanced Search
Rate This Thread
Rate This Thread:

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are Off
Refbacks are Off



All times are GMT -4. The time now is 03:13 AM.


Copyright © 2001-2012 InternetBrands, Inc. / MBWorld.org. All Rights Reserved.
 
  • Ask a Question
    Get answers from community experts
What's your question?
Send