Changing Spark Plugs
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Joined: Jul 2017
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2012 E550 Cabriolet 2011 VW Eos 1985 Pininfarina Spider
Changing Spark Plugs
It looks like Mercedes recommends changing the spark plugs every 50K miles, so it looks like I am about ready. What plugs do you use?
MBWorld God!
Joined: Dec 2019
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Super Member
Joined: Aug 2004
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E550 Coupe 2wd (2016)
I bought Bosch 96346, aka ZR6SII3320, from rockauto, $7.50ea three years ago. Just checked and they're $8.43. These are, from what I've read, the oem plugs minus the MB part # which saves a ton of $.
I had 58k on it and they made zero difference in power or mpg, which I expected.
My coils were dying left n right since they apparently have a timer to fail shortly after warranty, so I only changed the plugs since I was in there.
I agree with the others about being wary of counterfeit crap. Frikkin bass-turds, why don't they real job >: | So that means no Amazon, ebay etc. I hope they don't infiltrate to legit sellers, but who knows. I inspected mine and they looked legit, but how would one know? Also, would it actually matter? I also wonder if they bother making counterfeit Bosch, or do they only target the more expensive MB plugs? I dunno, just thinking out loud.
Then there's the popular one step colder plug option that is likely a good idea if it's tuned, or you drive it hard. And/or maybe better anyway and possibly less likely to be counterfeited? My notes say NGK 97506 and NGK 1555 were one step colder options, but you should research the subject because I don't even know what the differences between the two plugs are. I didn't bother because I'm running ~50% Ethanol.
I had 58k on it and they made zero difference in power or mpg, which I expected.
My coils were dying left n right since they apparently have a timer to fail shortly after warranty, so I only changed the plugs since I was in there.
I agree with the others about being wary of counterfeit crap. Frikkin bass-turds, why don't they real job >: | So that means no Amazon, ebay etc. I hope they don't infiltrate to legit sellers, but who knows. I inspected mine and they looked legit, but how would one know? Also, would it actually matter? I also wonder if they bother making counterfeit Bosch, or do they only target the more expensive MB plugs? I dunno, just thinking out loud.
Then there's the popular one step colder plug option that is likely a good idea if it's tuned, or you drive it hard. And/or maybe better anyway and possibly less likely to be counterfeited? My notes say NGK 97506 and NGK 1555 were one step colder options, but you should research the subject because I don't even know what the differences between the two plugs are. I didn't bother because I'm running ~50% Ethanol.
