Spark plug photos. Are these as fouled as I think they are?
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Joined: Nov 2007
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From: NYC
2012 C300 4Matic
Spark plug photos. Are these as fouled as I think they are?
The photos below are of one of my original NGK plugs with only 27,000 miles on it (2005 C240).
So far I only removed 2 plugs and they look identical. I have to get my hands on the right tool before I can remove the other plug wires without damaging them.
I decided to change them because my car was not starting as quickly or smoothly as it should.
I really don't have a clue about how spark plugs should look, but I'm guessing these are pretty well fouled with carbon / oil? Anyone?
So far I only removed 2 plugs and they look identical. I have to get my hands on the right tool before I can remove the other plug wires without damaging them.
I decided to change them because my car was not starting as quickly or smoothly as it should.
I really don't have a clue about how spark plugs should look, but I'm guessing these are pretty well fouled with carbon / oil? Anyone?
Last edited by acr2001; Sep 4, 2009 at 06:19 PM.
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Joined: Dec 2006
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From: Casa Grande, Arizona
2005 c230k
They look pretty good. I would wait to change them, but if you want it will not hurt. I recently changed my plugs at about 85k and they looked a bit worse than yours, but still acceptable for the miles. I did notice a slightly smoother engine though.
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From: Llandudno, Cape Town, South Africa
late 2009 CLK 350 Coupe Elegance, '65 Jaguar S Type wires
Mine looked similar at 45,000Km - Bosch though - Changing them stopped the spluttery starts I talked about on the other thread. I would change them as Benz advise. Bosch run a finer centre electrode.
Plugs from fuel injected cars running on lead free fuel always look so damn good compared with the lead errosion & deposits of the past. This can be misleading.
Plugs from fuel injected cars running on lead free fuel always look so damn good compared with the lead errosion & deposits of the past. This can be misleading.
Thread Starter
MBWorld Fanatic!
Joined: Nov 2007
Posts: 2,078
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From: NYC
2012 C300 4Matic
Mine looked similar at 45,000Km - Bosch though - Changing them stopped the spluttery starts I talked about on the other thread. I would change them as Benz advise. Bosch run a finer centre electrode.
Plugs from fuel injected cars running on lead free fuel always look so damn good compared with the lead errosion & deposits of the past. This can be misleading.
Plugs from fuel injected cars running on lead free fuel always look so damn good compared with the lead errosion & deposits of the past. This can be misleading.
Last edited by acr2001; Sep 4, 2009 at 09:50 PM.
Thread Starter
MBWorld Fanatic!
Joined: Nov 2007
Posts: 2,078
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From: NYC
2012 C300 4Matic
Finished swapping all the plugs today. The engine feels smoother and a lot stronger on the low end. Revs up more smoothly too.
Now I have to get the dealer to fix the passenger side recirculating cover which is leaking oil again. They already fixed it once but not surprisingly did a **** job.
Now I have to get the dealer to fix the passenger side recirculating cover which is leaking oil again. They already fixed it once but not surprisingly did a **** job.
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Thread Starter
MBWorld Fanatic!
Joined: Nov 2007
Posts: 2,078
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From: NYC
2012 C300 4Matic
It's pretty easy to fix - https://mbworld.org/forums/c-class-w...ing-cover.html
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