Spark Plug Replacement - M271
Senior Member
Joined: Sep 2008
Posts: 331
Likes: 9
From: Bangkok, Thailand
W124, W203, W204, W251
So, for a M271 (05 C230K SS) you can use
NGK ~ LFR6AIX-11
or
Bosch ~ FR-6-MPP-332
which one is better overall ?
NGK ~ LFR6AIX-11
or
Bosch ~ FR-6-MPP-332
which one is better overall ?
Hello,I have a 02 c320 wagon and would like to know if bosch iredium +4 is a good plug for it. thanks
Newbie
Joined: Nov 2007
Posts: 13
Likes: 1
From: CALIFORNIA
2011 R350 4MATIC
do you need a special spark plug socket to remove/install the spark plugs or any regular spark plug socket will work? i also read that you need to use a 17mm open wrench to pull the spark plug wires... thanks in advance
Member
Joined: Dec 2006
Posts: 118
Likes: 0
From: Casa Grande, Arizona
2005 c230k
Member
Joined: Dec 2006
Posts: 118
Likes: 0
From: Casa Grande, Arizona
2005 c230k
I used a 3/4" spark plug socket and they fit very well. They were not loose at all. 3/4" is equivalent to 19.05 mm. So it is probably a 19 mm socket, but the 3/4" should work fine since 0.05 mm is a very small amount to be over sized.
Newbie
Joined: Nov 2007
Posts: 13
Likes: 1
From: CALIFORNIA
2011 R350 4MATIC
fyi guys.. make sure you get a ratchet extention (about 7 inch).. the spark plug is pretty deep in the engine.. you will also need a torx socket to remove the coil.. other than that it's pretty easy.. only took me like 1/2 an hour to do the whole job plus 2 trip to the auto parts store to buy the right tools (torx socket and ratchet extention)
MB World Stories
The Best of Mercedes & AMG
7 Craziest Things AMG Gas Ever Built
Verdad Gallardo
New Electric Mercedes-AMG GT 4-Door Coupe Unveiled: 10 Things You Need to Know
Verdad Gallardo
6 Mercedes Models That Did NOT Age Well (But Are Somehow Still Cool)
Verdad Gallardo
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
MBWorld Fanatic!
Joined: Jul 2008
Posts: 8,384
Likes: 800
2019 G70 6MT & 2022 Ford Maverick XL
for using the search function.
Super Moderator
Joined: Jun 2008
Posts: 19,942
Likes: 192
From: Llandudno, Cape Town, South Africa
late 2009 CLK 350 Coupe Elegance, '65 Jaguar S Type wires
Newbie
Joined: Apr 2009
Posts: 6
Likes: 0
From: Miami, FL
2004 C230 K
The reason I asked about disconnecting the battery was because both the 2001-2007 Chilton's and Haynes, C-Class Repair Manuals, specify that you must disconnect the negative battery terminal before you remove ignition coils; then you can remove the spark plugs. Installation is the reverse of removal...
But could disconnecting the battery cause the ECU to lose some of its settings therefore requiring re-programming?
But could disconnecting the battery cause the ECU to lose some of its settings therefore requiring re-programming?
Almost a Member!
Joined: Feb 2008
Posts: 35
Likes: 0
2004 C230 Komp.
fyi guys.. make sure you get a ratchet extention (about 7 inch).. the spark plug is pretty deep in the engine.. you will also need a torx socket to remove the coil.. other than that it's pretty easy.. only took me like 1/2 an hour to do the whole job plus 2 trip to the auto parts store to buy the right tools (torx socket and ratchet extention)
thanks.
Almost a Member!
Joined: Feb 2008
Posts: 35
Likes: 0
2004 C230 Komp.
MBWorld Fanatic!
Joined: Aug 2007
Posts: 1,545
Likes: 87
From: San Jose, CA
2010 c300
Newbie
Joined: Apr 2009
Posts: 6
Likes: 0
From: Miami, FL
2004 C230 K
Senior Member
Joined: Dec 2004
Posts: 453
Likes: 3
From: Bay Area, CA
'04 Mars Red C230K Sport Coupe (not Coup-EH)
Can we get a confirmation of the reach on these spark plugs? I can't find anything on the reach on the OE Bosch, the NGK states 26.5mm. However, many car parts sites list plugs with 19mm reach for this engine. There's also a post around here by TEAMREDLINE regarding the reach (claims it should be 26.5, not 19 as listed most places).
It's quite confusing (and frustrating) to get three possible answers: 19mm, 26.5mm, or "it doesn't matter. (that's from the parts desk at the dealership)" Which one is it?
It's quite confusing (and frustrating) to get three possible answers: 19mm, 26.5mm, or "it doesn't matter. (that's from the parts desk at the dealership)" Which one is it?
Member
Joined: Dec 2006
Posts: 118
Likes: 0
From: Casa Grande, Arizona
2005 c230k
Can we get a confirmation of the reach on these spark plugs? I can't find anything on the reach on the OE Bosch, the NGK states 26.5mm. However, many car parts sites list plugs with 19mm reach for this engine. There's also a post around here by TEAMREDLINE regarding the reach (claims it should be 26.5, not 19 as listed most places).
It's quite confusing (and frustrating) to get three possible answers: 19mm, 26.5mm, or "it doesn't matter. (that's from the parts desk at the dealership)" Which one is it?
It's quite confusing (and frustrating) to get three possible answers: 19mm, 26.5mm, or "it doesn't matter. (that's from the parts desk at the dealership)" Which one is it?
). The threads are very long, longest plugs I have ever installed. Unfortunately I do not have an old plug but I am fairly sure it is the 26.5mm. If the plug is not long enough it will sit up in a hole and probably not fire properly. If you are very concerned I would just take one out and measure it. It takes no time at all. This is what I would do if I was not planning to buy at the dealer. Even though your dealer seems a bit scary.
