E-Class (W211) 2003-2009

Help with engine knock

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Old Apr 15, 2025 | 06:22 PM
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C240
Help with engine knock

https://www.youtube.com/shorts/WZ6ga0SxM2w
So I've read too many posts with similar sounds and no remedy. M112 & M272, Frustrating...
It actually sounds worse than in video, I think too much background noise.
Many people say just run it, some of them knock. I could live with that if I read some posts from people saying they have been driving with a knock for tens of thousands of miles. Anyone out there?
Is that oil pressure normal at warm idle? It started @ 70psi, rose to 80 for several minutes, then slowly fell as engine warmed. Bad bearing I assumed would be very low idle pressure...
Fresh oil change just in case, previous change documented 3000mi ago.
Can you see crank/rods with lower oil pan pulled?
Lastly is a Chrysler crossfire the same engine, like is swap plug & play?
Oh, this is an 04 e320 w/ 155,000mi...
Thanks
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Old Apr 15, 2025 | 06:36 PM
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Just run it
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Old Apr 18, 2025 | 08:04 AM
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[size=16px]Anyone know if you can see the crank/rods with lower oil pan pulled?[/size]
[size=16px]Is a Chrysler crossfire the same engine, like is swap plug & play?
There's two crossfire engines 4/S really cheap near me...[/size]
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Old Apr 20, 2025 | 11:10 PM
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OP make your YouTube a real link and we can partake.
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Old Apr 22, 2025 | 06:33 PM
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Old Oct 4, 2025 | 01:52 PM
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Obviously not good... if it was one cylinder i say piston slap but thinking rod knock.
Too lazy to take the time for #2&4, should have done compression but didn't think until I was already putting it back together
Cyl1
Cyl1
Cyl2
Cyl2
Cyl5
Cyl5
Cyl6
Cyl6


Last edited by Enormiss; Oct 4, 2025 at 01:57 PM.
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