C400 Knocking noise on idle - with video! - Page 2

Dec 21, 2023 | 12:27 PM

#26

ali$172626173

Newbie

Joined: Dec 2023

Posts: 10

Likes: 0

2015 Mercedes Benz c400

Quote:

Originally Posted by ali$172626173

this is the exact sound inside the car
only happens when car is idle temp

here

Dec 21, 2023 | 12:44 PM

#27

ali$172626173

Newbie

Joined: Dec 2023

Posts: 10

Likes: 0

2015 Mercedes Benz c400

Hoping it uploaded. Here it is

Attached Files

72487407502__6BBF97B3-93C1-4B45-AB3E-313DF69F6036.MOV (1.51 MB, 45 views)

Last edited by ali$172626173; Dec 21, 2023 at 12:55 PM.

Dec 21, 2023 | 01:00 PM

#28

ali$172626173

Newbie

Joined: Dec 2023

Posts: 10

Likes: 0

2015 Mercedes Benz c400

Quote:

Originally Posted by Cosworth2000

It would not be injections because the car would not run go.
It could be the Camshaft, look to see if you see any oil around the left side and right side.

Also, since it goes away when you revv the car, you could have a leak in the vacuums system or it could also be the idler or tensioner whereas the bearings are going.

I linked a video of the sound down below. Let me know what you think

I can’t hear it inside engine bay at all. Only inside cabin (sounds like it’s coming from the front) and inside gas cap

Dec 23, 2023 | 09:45 PM

#29

W205C43PFL

MBWorld God!

Joined: Dec 2019

Posts: 32,681

Likes: 6,420

Quote:

Originally Posted by juanmor40

Wonder if you are following either of the threads leading to the following video

https://www.youtube.com/watch?v=MuZJSGN8qZ4&t=282s

the threads include:

The birth thread: https://mbworld.org/forums/e-class-w...ml#post8621276

derivatives:
https://mbworld.org/forums/mercedes-...ification.html

https://mbworld.org/forums/showthrea...9&goto=newpost

Appreciate the links, I am a subscriber to that video and subscribed to the birth thread, thanks for linking everything, I will subscribe to the last two.