spark plug change notes 2013 e350
07-09-2018, 05:53 PM
#1
spark plug change notes 2013 e350
changed my plugs, here are some notes in response to the info provided in other threads.
my 2013 350.
spark plug socket is a must as is the hose clamp tool
only need to remove the air box on the pass side
only need to remove the ecu and harness mount bracket on driver side (didn't disconnect battery)
coils and plugs are easily accessible
the idea of indexing seems not to apply. the crush of the copper washer is so stiff that you could double the applied torque and not effect the final plug angle. there's only one thread start so this can't be effected any other way. (i noted the electrode position on all removed plugs for reference.)
all plugs ended up just shy of a quarter turn less than the plugs removed
total work time ~1hr
Update:
a few more comments,
a straight 6" socket extension will work to reach all plugs and remove them without breaking down the socket/extension/plug. So you can observe the index angle, for fun...
no anti seize used.
thanks to all that posted prior info
my 2013 350.
spark plug socket is a must as is the hose clamp tool
only need to remove the air box on the pass side
only need to remove the ecu and harness mount bracket on driver side (didn't disconnect battery)
coils and plugs are easily accessible
the idea of indexing seems not to apply. the crush of the copper washer is so stiff that you could double the applied torque and not effect the final plug angle. there's only one thread start so this can't be effected any other way. (i noted the electrode position on all removed plugs for reference.)
all plugs ended up just shy of a quarter turn less than the plugs removed
total work time ~1hr
Update:
a few more comments,
a straight 6" socket extension will work to reach all plugs and remove them without breaking down the socket/extension/plug. So you can observe the index angle, for fun...
no anti seize used.
thanks to all that posted prior info
Last edited by Jabberwock; 07-10-2018 at 05:17 PM. Reason: updated info
07-10-2018, 05:09 PM
#6
07-11-2018, 06:06 AM
#7
Junior Member
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08-06-2018, 04:43 PM
#9
Junior Member
My local MB dealership said my spark plugs need to be changed - for $673.62! I was stunned. I told my local repair shop about this mind-boggling ripoff and he said on some Mercedes the computer increases the power going to the spark plugs as they wear. He said the computer has to be reset or the spark plugs will be burned out. He didn't know if my 2013 C350 had to have this done or not. Has anyone ever hear of this or know if my model has this "feature?"
08-07-2018, 08:09 AM
#10
My local MB dealership said my spark plugs need to be changed - for $673.62! I was stunned. I told my local repair shop about this mind-boggling ripoff and he said on some Mercedes the computer increases the power going to the spark plugs as they wear. He said the computer has to be reset or the spark plugs will be burned out. He didn't know if my 2013 C350 had to have this done or not. Has anyone ever hear of this or know if my model has this "feature?"
The following users liked this post:
Moxostoma (08-11-2018)
10-12-2018, 05:58 PM
#11
Junior Member
Is there anything I should be aware of before I remove the ECU to get to the driver's side plugs? The only procedure I can find is here:
https://shop.amrperformance.com/2018...removal-guide/
They say to get the ECU scanned before removing it. They also say to unplug the battery - something Jabberwock says NOT to do. Can the ECU be pulled out of the way without disconnecting the wires or do they have to be disconnected?
https://shop.amrperformance.com/2018...removal-guide/
They say to get the ECU scanned before removing it. They also say to unplug the battery - something Jabberwock says NOT to do. Can the ECU be pulled out of the way without disconnecting the wires or do they have to be disconnected?
10-12-2018, 06:04 PM
#12
It needs to be removed. I tried without at first but the harness is too short.
Also to clarify, I didn't say "not" to do it, rather I just didn't and it was fine. Also it's been 3 months since and not a glitch. I wouldn't hesitate to do it again.
Also to clarify, I didn't say "not" to do it, rather I just didn't and it was fine. Also it's been 3 months since and not a glitch. I wouldn't hesitate to do it again.
10-12-2018, 06:51 PM
#13
Junior Member
Thanks. Another question: Did you remove the intake manifold or use this method - file:///C:/Users/~/Downloads/(M276%20Engine)%20Spark%20Plug%20Replacement.pdf - using the special Mercedes-Benz broom stick and rope tool?
10-12-2018, 09:15 PM
#14
No need to remove the intake manifold.
I didnt look at that link but I think you're referring to the coil removal. They are on there pretty good but I didn't use that trick. I found it much easier to use a long screw driver as a pry tool and pry them out by the loop hole on the plug boot. The loop hole must be there for some other type of extraction method but worked great with the screw driver.
I didnt look at that link but I think you're referring to the coil removal. They are on there pretty good but I didn't use that trick. I found it much easier to use a long screw driver as a pry tool and pry them out by the loop hole on the plug boot. The loop hole must be there for some other type of extraction method but worked great with the screw driver.
The following users liked this post:
Moxostoma (10-13-2018)
