2010 C300 Spark Plugs




At a minimum I try to follow the recommendations in the Maintenance manual that came with the Operators Manual. I have a 2010 4matic with M272 engine and the manual shows replace the spark plugs at 80,000 miles or 8 years.
So if the plugs have either 80,000 miles on them OR they are over 8yrs old I would replace them.
Especially if you do the work yourself it isn't expensive at all.



