Am I basically f***ed? Lots of dark silver stuff in oil filter
Thread Starter
Junior Member
Joined: Aug 2024
Posts: 21
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w221 s600
Am I basically f***ed? Lots of dark silver stuff in oil filter
Just did an oil change on my w221 s600, 108k miles (5k miles on the oil). And found what appears to be the forbidden silver sludge in the oil filter. It does feel like metal when smeared on my fingertip. Are these bearing materials? Am I basically f***ed?
Last edited by johnny_3352; Mar 15, 2026 at 07:35 PM. Reason: typo
Super Member
Joined: Dec 2015
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From: Suburban Maryland
2023 E 450 Sedan. 2018 GLC 300. 2013 E 350 Coupe (retired)
Based on my experience on more fragile aircraft engines, when we found something in the filter, and we often did, we would first test it with a magnet to see if the stuff was metalic and then send it with the oil to a lab for identification of what is wearing or breaking. Some mechanics would say it may be a one off event and it is safe to put in new oil and filter and inspect again in 5 or 10 hours (1000 miles).
Last edited by smiles201; Mar 15, 2026 at 09:56 PM.
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Joined: Oct 2023
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W221 S500
Whatever it is, the filter is going its job.
If you're paranoid, drop the sump pan and clean it along with the oil pick up. See what you find in there.
Then, pop in a fresh filter, some decent oil and a quality engine flush. Drive it for a couple of hundred miles and repeat the above. Any thing amiss should be obvious.
Alternatively, put it back together and stop trying to scare yourself by cutting open the oil filters.
Using the correct oil and filters is actually important and why MB service parts are reasonably priced.
If you're paranoid, drop the sump pan and clean it along with the oil pick up. See what you find in there.
Then, pop in a fresh filter, some decent oil and a quality engine flush. Drive it for a couple of hundred miles and repeat the above. Any thing amiss should be obvious.
Alternatively, put it back together and stop trying to scare yourself by cutting open the oil filters.
Using the correct oil and filters is actually important and why MB service parts are reasonably priced.
MBWorld Fanatic!
Joined: Feb 2012
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From: Phoenix
222 S-65
OP oil analysis is the correct answer.
That said.... I've seen a LOT worse that keeps on chugging another 100,000 miles.
I'm a lot more concerned when I see 'Glitter.' But answer ends up the same there too....
It is quiet, not knocking?
Quality engine oil and OEM filter changed on time FTW.
That said.... I've seen a LOT worse that keeps on chugging another 100,000 miles.
I'm a lot more concerned when I see 'Glitter.' But answer ends up the same there too....
It is quiet, not knocking?
Quality engine oil and OEM filter changed on time FTW.
Thread Starter
Junior Member
Joined: Aug 2024
Posts: 21
Likes: 7
w221 s600
thanks for all the replies! unfortunately the oil is drained to an ultra dirty pan with old oil, trans fluid, coolant, ps fluid and dirt, leaves, dead spiders etc etc so I can't do oil analysis for this oil change. Will do an analysis the next time I change oil. I took another look at those chunks under strong light and they do not glitter, and after looking at a bunch of other peoples filtered sludge online, I think they are more likely to be just sludge/carbon, so I'm feeling slightly better now 
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MBWorld Fanatic!
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From: Phoenix
222 S-65
Connecting rod/main bearings would be a very unusual failure in your V-12. When the 275 in my 221 spat a main bearing shell into the chains... minimal glitter in the oil... Just plastic parts torn off of timing chain guides as the bearing shell landed on the chain pulley on the crank and tried to roll the chain forward. It jumped time for a dozen bent exhaust valves. Good times.
Last edited by JohnLane; Mar 18, 2026 at 07:04 PM.
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Please post photos of the filter pleats from the prior oil change.
