Pepped it up a little
Thread Starter
MBWorld Fanatic!
Joined: Feb 2002
Posts: 9,815
Likes: 13
John Deere
Pepped it up a little
Having reached 121k miles on my original spark plugs, I figured it might be time for a change. 
Had TVT Design replace the OEM plugs with NGK Iridium, and while doing so also swapped out the wires for Magnecors.
The car immediately felt more responsive, more freely revving, and my fuel economy improved a fair bit.
If you're looking to get a little pep, I recommend this change.
Had TVT Design replace the OEM plugs with NGK Iridium, and while doing so also swapped out the wires for Magnecors.
The car immediately felt more responsive, more freely revving, and my fuel economy improved a fair bit.
If you're looking to get a little pep, I recommend this change.
MBWorld Fanatic!
Joined: Apr 2007
Posts: 6,171
Likes: 16
300E a couple 1994 w124wagon E320 Wagon/,1971MGB Track/Rally, MG Midget Autocross ,2000 E320 wagon.
NGK 7090
plats would have done the same thing.
New wires were not needed,when properly removed with the 17 mm boot tool,they never wear out.Magcores will lead to misfires,so if you start seeing obd2 codes for p0300 you will hope you had hung onto the oem wires that last forever.
At 121k miles,it is no wonder it feels more responsive.
The oem plugs were most likely down to the nub and gapped worn to .045 instead of oe .039
$38 delivered from me for the 17mm boot tool and 2.89 each for the plugs at any local parts store and 2 hours of your time on a sat. morning and you coulda had it done by yourself,for under 100 bucks
What did the indie charge?
New wires were not needed,when properly removed with the 17 mm boot tool,they never wear out.Magcores will lead to misfires,so if you start seeing obd2 codes for p0300 you will hope you had hung onto the oem wires that last forever.
At 121k miles,it is no wonder it feels more responsive.
The oem plugs were most likely down to the nub and gapped worn to .045 instead of oe .039
$38 delivered from me for the 17mm boot tool and 2.89 each for the plugs at any local parts store and 2 hours of your time on a sat. morning and you coulda had it done by yourself,for under 100 bucks
What did the indie charge?
Thread Starter
MBWorld Fanatic!
Joined: Feb 2002
Posts: 9,815
Likes: 13
John Deere
plats would have done the same thing.
New wires were not needed,when properly removed with the 17 mm boot tool,they never wear out.Magcores will lead to misfires,so if you start seeing obd2 codes for p0300 you will hope you had hung onto the oem wires that last forever.
At 121k miles,it is no wonder it feels more responsive.
The oem plugs were most likely down to the nub and gapped worn to .045 instead of oe .039
$38 delivered from me for the 17mm boot tool and 2.89 each for the plugs at any local parts store and 2 hours of your time on a sat. morning and you coulda had it done by yourself,for under 100 bucks
What did the indie charge?
New wires were not needed,when properly removed with the 17 mm boot tool,they never wear out.Magcores will lead to misfires,so if you start seeing obd2 codes for p0300 you will hope you had hung onto the oem wires that last forever.
At 121k miles,it is no wonder it feels more responsive.
The oem plugs were most likely down to the nub and gapped worn to .045 instead of oe .039
$38 delivered from me for the 17mm boot tool and 2.89 each for the plugs at any local parts store and 2 hours of your time on a sat. morning and you coulda had it done by yourself,for under 100 bucks
What did the indie charge?
I'm not sure why you are claiming they will cause misfires.
The labor was almost nothing. We had to wait almost two hours for the computer files to download at the same time (different project). And frankly, that is one job I'd rather not do. Those plugs are buried in there pretty good, not to mention being frozen after 10 years.
Super Member
Joined: Aug 2005
Posts: 801
Likes: 1
From: Mercerville New Jersey
1991 560SEC Teal 1989 420SEL Ice Blue 1984 500SEC White
The plugs were worn down pretty much all the way.
I'm not sure why you are claiming they will cause misfires.
The labor was almost nothing. We had to wait almost two hours for the computer files to download at the same time (different project). And frankly, that is one job I'd rather not do. Those plugs are buried in there pretty good, not to mention being frozen after 10 years.
I'm not sure why you are claiming they will cause misfires.
The labor was almost nothing. We had to wait almost two hours for the computer files to download at the same time (different project). And frankly, that is one job I'd rather not do. Those plugs are buried in there pretty good, not to mention being frozen after 10 years.
Thread Starter
MBWorld Fanatic!
Joined: Feb 2002
Posts: 9,815
Likes: 13
John Deere
Ohlord, I checked around and learned that the old blue magnecors had problems slipping off, but the new red ones have no issues in the 15-20 cars he put them in, including his own track racer.
Trending Topics
Senior Member
Joined: Oct 2004
Posts: 308
Likes: 0
From: Honolulu, Hawaii
2001 E55, 2002 ML55, 2002 SL500, 2003 CLK55
plats would have done the same thing.
New wires were not needed,when properly removed with the 17 mm boot tool,they never wear out.Magcores will lead to misfires,so if you start seeing obd2 codes for p0300 you will hope you had hung onto the oem wires that last forever.
At 121k miles,it is no wonder it feels more responsive.
The oem plugs were most likely down to the nub and gapped worn to .045 instead of oe .039
$38 delivered from me for the 17mm boot tool and 2.89 each for the plugs at any local parts store and 2 hours of your time on a sat. morning and you coulda had it done by yourself,for under 100 bucks
What did the indie charge?
New wires were not needed,when properly removed with the 17 mm boot tool,they never wear out.Magcores will lead to misfires,so if you start seeing obd2 codes for p0300 you will hope you had hung onto the oem wires that last forever.
At 121k miles,it is no wonder it feels more responsive.
The oem plugs were most likely down to the nub and gapped worn to .045 instead of oe .039
$38 delivered from me for the 17mm boot tool and 2.89 each for the plugs at any local parts store and 2 hours of your time on a sat. morning and you coulda had it done by yourself,for under 100 bucks
What did the indie charge?
Had a Porsche and used Magnecor's that everyone talked so highly about.
Had a friend do some work on the Porsche and he said the Magnecor's were leaking voltage all over and looked like a Christmas tree.
I also have to agree that the factory wires sets are hard to beat. Even on BMW's the OEM wire sets are very nicely made with high quality parts. Although I don't know why Mercedes wanted to use metal on the plugs rather than silicone.
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
10 Most Reliable Mercedes-Benz Models You Can Buy Used
Verdad Gallardo
MBWorld Fanatic!
Joined: Apr 2007
Posts: 6,171
Likes: 16
300E a couple 1994 w124wagon E320 Wagon/,1971MGB Track/Rally, MG Midget Autocross ,2000 E320 wagon.
Race set
wires are for race cars.I race also and there are better wires than mags.
However for the street and the mb ignition the oem wires can't be beat.They do the job,they match the coil output and they last till the end of time.Unless you yank on them instead of using the offset boot tool.
With that tool and 2 hours I have talked girls through the plug change on a C320 .Now that is a tight fit and they managed.Plus the dealer wanted 800 bucks,so they were very happy
However for the street and the mb ignition the oem wires can't be beat.They do the job,they match the coil output and they last till the end of time.Unless you yank on them instead of using the offset boot tool.
With that tool and 2 hours I have talked girls through the plug change on a C320 .Now that is a tight fit and they managed.Plus the dealer wanted 800 bucks,so they were very happy
Thread Starter
MBWorld Fanatic!
Joined: Feb 2002
Posts: 9,815
Likes: 13
John Deere
I've got to agree with ohlord on this one.
Had a Porsche and used Magnecor's that everyone talked so highly about.
Had a friend do some work on the Porsche and he said the Magnecor's were leaking voltage all over and looked like a Christmas tree.
I also have to agree that the factory wires sets are hard to beat. Even on BMW's the OEM wire sets are very nicely made with high quality parts. Although I don't know why Mercedes wanted to use metal on the plugs rather than silicone.
Had a Porsche and used Magnecor's that everyone talked so highly about.
Had a friend do some work on the Porsche and he said the Magnecor's were leaking voltage all over and looked like a Christmas tree.
I also have to agree that the factory wires sets are hard to beat. Even on BMW's the OEM wire sets are very nicely made with high quality parts. Although I don't know why Mercedes wanted to use metal on the plugs rather than silicone.
I have had no problems thus far. In fact, I am spanking tractor trailers left and right.
Senior Member
Joined: Oct 2004
Posts: 308
Likes: 0
From: Honolulu, Hawaii
2001 E55, 2002 ML55, 2002 SL500, 2003 CLK55
