Spark Plug Experts - Reading a Plug
#1
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Spark Plug Experts - Reading a Plug
I scrapped the build up around the top, please ignore. This one was black around the top like the others.
As title states, calling in the experts. How do these plugs look? Currently have 10,000 miles on them, i pulled to check. Stock replacement NGK's ILFRA something or other.
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2004 E55,1969 300SEL6.3,2011 ML350 BlueTec Diesel,2005 ML400 CDI
With a magnifier and a light, look inside the barrel around the base of the insulator insulator. Do this with all 16. There you will see the true condition.