Spark Plug replacement at 60k miles




, so glad I didn't pay for that extension.
I'll stick with my independent mechanics. The PPM is advertised as some 30% savings "potentially" and it is really more of a case of "all triple priced items half off"




I'll stick with my independent mechanics. The PPM is advertised as some 30% savings "potentially" and it is really more of a case of "all triple priced items half off"

I'll stick with my independent mechanics. The PPM is advertised as some 30% savings "potentially" and it is really more of a case of "all triple priced items half off"
I've seen it a few times, and now it is "registering"

Here's another article about it https://emercedesbenz.com/autos/merc...ore-efficient/
Yeah, it definitely makes sense to change them when MB suggests




If "multi-spark" means what I think 30 000 miles is not equivalent to 60 000 miles. It is for the amount of sparks but half of the sparks happen during "cool" cycle compared to work cycle that is the hot one. It is the spark and heat together that wears the plugs. Heat from the spark is so minimal it really does not do anything by itself.
no, these fire 2 or 3 times during the power cycle, along with 2-4 direct injection squirts. direct injection is a whole new ball game.
re: thinking 60K miles is too much, I remember changing the plugs every 12-15K miles on most all cars back in the 70s, along with distributor cap, rotor, and points, then having to set the dwell and timing.
Right bank front cylinder
Right bank middle cylinder
Right bank rear cylinder
Left bank front cylinder
Left bank middle cylinder
Left bank rear cylinder




Seems there is nothing wrong at all with the used ones. Very little if any wear on them.
The Best of Mercedes & AMG

I got a price quote from Cassandra Castro on a 2pk PPM for $1400 that would cover the 50k and 60k on my car. Since the plugs and ATF change are $1200 on their own, this is not a terrible deal. I am going to get one from Jeff Jackson and see if its lower.





I got a price quote from Cassandra Castro on a 2pk PPM for $1400 that would cover the 50k and 60k on my car. Since the plugs and ATF change are $1200 on their own, this is not a terrible deal. I am going to get one from Jeff Jackson and see if its lower.




Motor and tranny mounts, all four cam magnets, etc.
Last edited by pierrejoliat; Jan 12, 2021 at 08:53 AM.




It is quiet involved as you do need to remove the intake manifold. But up to you guys.




MB plug thread + cylinder head thread + crush washer + MB torque spec = correct indexing position within acceptable tolerance.




I was under the impression that the Euro cars used a different ignition sequence and needed indexing and the US version did not, I could be wrong and can't remember where I read that at the moment, just thought I'd put that out there...




Previous to Euro IV, only Euro II grade so I heard.
So since 2014 - late 2018 this engine I guess been drinking bad booze, albeit supposedly 95 RON ...

However my car is tuned for 95 RON as per fuel tank cover label.
10,700 KM spark plugs. I wonder what are those whitish crystal like deposit on plug no 4 ?
Indexing is accomplished by purchased MB spark plugs with an MB crush washer, and installing them using the MB specified torque spec. This indexes the plug within the acceptable tolerance range.




Indexing is accomplished by purchased MB spark plugs with an MB crush washer, and installing them using the MB specified torque spec. This indexes the plug within the acceptable tolerance range.




Previous to Euro IV, only Euro II grade so I heard.
So since 2014 - late 2018 this engine I guess been drinking bad booze, albeit supposedly 95 RON ...

However my car is tuned for 95 RON as per fuel tank cover label.
10,700 KM spark plugs. I wonder what are those whitish crystal like deposit on plug no 4 ?
I have always wondered what would happen if I actually used E-85, do others have these designations?






