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What my spark plugs look like at 50k

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Old Feb 11, 2023 | 10:18 AM
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2019 W222 S560 4Matic/2025 Yukon Denali
What my spark plugs look like at 50k
2019 s560.
As usual I did not take video of this job.




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Old Feb 11, 2023 | 01:43 PM
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2020 S560, 2014 SLK55 (Prev. 2016 S65, 2013 SLK350, 2008 CLS63, 2006 E350, 2006 CLS500, 2005 C230K)
While electrode wise those look OK they were probably at the limit on the corrosion side.
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Old Feb 11, 2023 | 01:50 PM
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Any misfiring on 7 cylinders?

Plugs look about right.
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Old Feb 11, 2023 | 01:57 PM
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Originally Posted by chassis
Any misfiring on 7 cylinders?

Good one!
Missed that.
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Old Feb 11, 2023 | 07:43 PM
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7 plugs in a V-8 engine in both pictures ?!?!?
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Old Feb 11, 2023 | 07:44 PM
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Man, just missed one in the photo.
no issues with misfires.
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Old Feb 11, 2023 | 07:55 PM
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The plugs look very healthy. If you had just pulled one, I would say delay changing them another 20k miles. But no harm in getting the job done either! First time? How long did it take you?
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Old Feb 11, 2023 | 09:07 PM
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Originally Posted by cfmistry
The plugs look very healthy. If you had just pulled one, I would say delay changing them another 20k miles. But no harm in getting the job done either! First time? How long did it take you?
about 4-5 hours plus a trip to the dealer to get 2 boots I ripped.
The only other MB plugs I’ve done were in my w220 and an ML350 I had back in 2009.
Last edited by vinflouen; Feb 11, 2023 at 09:28 PM.
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Old Feb 11, 2023 | 09:08 PM
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Can definetly go longer on millage but also have to keep into account the potential small tragedy that is a sized plug.
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Old Feb 12, 2023 | 11:26 AM
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OP they look utterly normal.

I gave mine two dozen fresh plugs a while back. They always run better after.
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Old Feb 12, 2023 | 11:45 AM
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Originally Posted by JohnLane
OP they look utterly normal.

I gave mine two dozen fresh plugs a while back. They always run better after.
it sure does run smoother.
it went from tiny idle noise to no idle noise.
Ran xentry and all is good.
if you keep the w222 in top shape with a 50k underside fluids change and plugs, filters etc and go with 5k oil change I believe these cars can outlast the w223.
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Old Feb 12, 2023 | 04:02 PM
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Originally Posted by vinflouen
it sure does run smoother.
it went from tiny idle noise to no idle noise.
Ran xentry and all is good.
if you keep the w222 in top shape with a 50k underside fluids change and plugs, filters etc and go with 5k oil change I believe these cars can outlast the w223.
Ignition coil replacement at 100k miles also makes a noticeable difference in smoothness.
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