E-Class (W211) 2003-2009

Knocking noise from 2004 E320 cdi

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Old 09-17-2023, 09:39 PM
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K13
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2004 E320 Cdi
Knocking noise from 2004 E320 cdi

Would like to know if anyone has had this noise and what the cause of it is, had some people say its the injectors and some say its the tappets, would like to know before I get into the engine.

https://reddit.com/r/test/s/ab6hsfxDZw
Old 09-20-2023, 05:23 PM
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2005 E320 CDI
The sound does not play for me.

My 2005 CDI with 245,000 miles seems pretty quiet; however, it is a diesel so it is an inherently clattery engine. Do you have the engine cover on? It is packed with sound absorbing material.

Peter
Old 09-21-2023, 10:14 PM
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ot1
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2006 E320 CDI
Originally Posted by K13
Would like to know if anyone has had this noise and what the cause of it is, had some people say its the injectors and some say its the tappets, would like to know before I get into the engine.

https://reddit.com/r/test/s/ab6hsfxDZw
Definitely much louder than my 2006 om648. I hear metal on metal. I think you need to zero in where that noise is coming from waving your smart phone around with camera recording…what about the high pressure fuel pump? Remember the mics are at the bottom of the phone and camera lens is at the top.
Old 06-25-2024, 11:02 PM
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e320 cdi
Originally Posted by K13
Would like to know if anyone has had this noise and what the cause of it is, had some people say its the injectors and some say its the tappets, would like to know before I get into the engine.

https://reddit.com/r/test/s/ab6hsfxDZw
did you ever find a solution? Going through the same thing right now and I’m losing my mind trying to find it

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