Spark Plug Replacement - M271
05-06-2009, 02:54 PM
#27
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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
05-15-2009, 02:13 PM
#28
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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
05-16-2009, 09:34 PM
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2005 c230k
05-16-2009, 09:40 PM
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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.
05-21-2009, 05:06 PM
#32
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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)
05-25-2009, 07:26 PM
#36
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for using the search function.
05-25-2009, 08:31 PM
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05-27-2009, 08:50 AM
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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?
05-27-2009, 09:21 AM
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2004 C230 K
I think I might need to rephrase my question: has anyone successfully replaced ignition coils and spark plugs on a C-Class without first disconnecting the battery?
06-15-2009, 02:10 PM
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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.
06-15-2009, 03:12 PM
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2004 C230 Komp.
06-15-2009, 05:01 PM
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2004 C230 K
06-15-2009, 05:41 PM
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'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?
06-15-2009, 09:24 PM
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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.
