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W211 AMG Discuss the W211 AMG's such as the E55 and the E63

Spark plug confirmation

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Old Feb 12, 2013 | 01:02 PM
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2004 E55 AMG
Spark plug confirmation
Hello,

Is this the right spark plug for our 04 E55 ? I have no mods whatsoever other than Eurocharged tune.

LFR7AIX 2309 NGK Iridium IX

I need 16 right ? Also would I need a re-tune with these in ?
Another question what does one step colder actually accomplish ?
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Old Feb 12, 2013 | 02:01 PM
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W211 E55
No reason to go a step colder if your running a stock motor. Just stick with the OEM 6 heat range. No tune needed.
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Old Feb 12, 2013 | 02:11 PM
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But I'm getting an awesome deal on them. The regular Bosch are like 11 something

One more question once I get the plug how do I check if they are originally LFR7AIX 2309 and not something else packed in them?
Last edited by viren.89; Feb 12, 2013 at 05:27 PM.
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Old Feb 12, 2013 | 05:57 PM
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Also one step colder isn't bad for a non-modified engine is it ?
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Old Feb 12, 2013 | 06:09 PM
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Originally Posted by viren.89
But I'm getting an awesome deal on them. The regular Bosch are like 11 something

One more question once I get the plug how do I check if they are originally LFR7AIX 2309 and not something else packed in them?
you'll know because it will be engraved or labeled as such on the plug itself.
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Old Feb 12, 2013 | 06:19 PM
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Oh okay. Thanks
Nothing wrong with getting a step colder on a non-modified vehicle right ?
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Old Feb 12, 2013 | 07:16 PM
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they may foul over time since they're expecting a higher temp - but i'd say get em, and for the cost savings get a tune to go with it
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Old Feb 12, 2013 | 07:41 PM
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If your going to mod in the future go 1 step colder for sure and even if your not the 1 step colder will still be fine. 4 stroke engines don't fouls plugs unless you have a ton of blow by and run beyond pig rich.
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Old Feb 12, 2013 | 08:13 PM
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I already have a EC tune, I was asking if I'd need a re-tune to match the 1 step colder plugs but I guess not. Thanks all
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Old Feb 12, 2013 | 08:27 PM
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Originally Posted by viren.89
I already have a EC tune, I was asking if I'd need a re-tune to match the 1 step colder plugs but I guess not. Thanks all
oh, nah you're good with the tune... what's your next mod?
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Old Feb 12, 2013 | 08:44 PM
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Might put in a k&n air filter that's it lol all my mod money is going towards lawyers for speeding ticket I received.
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Old Feb 12, 2013 | 09:14 PM
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Originally Posted by viren.89
Might put in a k&n air filter that's it lol all my mod money is going towards lawyers for speeding ticket I received.
yikes! good luck!

may as well do the K&Ns < $80 for both
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Old Feb 12, 2013 | 09:34 PM
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80$ for both ? you got a link for the website ?
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Old Feb 12, 2013 | 11:13 PM
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Originally Posted by viren.89
80$ for both ? you got a link for the website ?
in my signature
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