are the stock mb spark plugs iridium?
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cl600
are the stock mb spark plugs iridium?
2004 cl600. i know some members recommend the ngk iridium plugs, but are the stock mercedes plugs you purchase at the dealership copper, platinum, or iridium? i know they list for $19 each, local dealer wants $24, and i can get them on line for $10.15. what material are these stock plugs made out of? also should i purchase 24 connectors for the spark plus as well?
thanks
thanks
MBWorld Fanatic!
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From: Southern California, USA
2003 CL55 AMG
Stock plugs on my CL55 were NGK-R iridium, however if you have Bosch stock plugs they are platinum. When I changed mine I opted to use NGK iridium (NGK LFR6AIX-11)
I did not need to purchase connectors as t hey came as needed.
I believe your CL600 would use NGK IFR6Q-G
I did however change the full set of plug wires at 100,000 miles as some were holding too much resistance on testing.
I did not need to purchase connectors as t hey came as needed.
I believe your CL600 would use NGK IFR6Q-G
I did however change the full set of plug wires at 100,000 miles as some were holding too much resistance on testing.
Last edited by awiner; Dec 2, 2012 at 01:44 PM.
Thread Starter
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cl600
i wasn't aware i had spark plug wires. aren't the spark plugs connected to the coil packs via the rubber spark plug connectors? if so is it recommended to buy 24 connectors along with the spark plugs? do these usually go bad, or get damaged when replacing spark plugs? 2004 cl600.
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From: Southern California, USA
2003 CL55 AMG
You are correct, the "Spark Plug Wires" go from the plugs to the coil packs. They are still in essence spark plug wires though, just shorter than usual 
Heat and use degrades the wires, insulation, etc. Resistance builds up when this happens. You can test your wires with a Ohm meter to check for resistance.
Also you can feel the insulation and see if there are any hard spots, cracks or damage.
Heat and use degrades the wires, insulation, etc. Resistance builds up when this happens. You can test your wires with a Ohm meter to check for resistance.
Also you can feel the insulation and see if there are any hard spots, cracks or damage.
Thread Starter
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cl600
iv'e been searching for spark plug wires for a 2004 cl600 and haven't been able to find any. the coil pack appears to fit over the spark plugs with the rubber spark plug connector inside the tube on the coil pack.
can you let me know where to get spark plug wires for a 2004 cl600.
thanks
can you let me know where to get spark plug wires for a 2004 cl600.
thanks
MBWorld Fanatic!
Joined: Nov 2001
Posts: 6,340
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From: Southern California, USA
2003 CL55 AMG
Did some research and the V12 ONLY uses Spark Plug Connectors between the plug and coil pack. These connectors (Part #A000-159-00-80), actually can be purchased separately, but also come with complete coil packs.
Yours are probably OK as it seems the coil packs get replaced a lot on the V12's.
Yours are probably OK as it seems the coil packs get replaced a lot on the V12's.
