AT mission noise

My 2011Y W204 C63 has a noise coming from the transmission that sounds like a metallic sound.
I'm trying to figure out the cause of this noise, but if anyone knows, please give me some advice.
Kind regards
This is the link address of the video.
Last edited by chibi_kantoku; Nov 10, 2023 at 02:15 AM.


I also changed the differential oil, but nothing changed.
I will try replacing the center bearing.
When driving through tunnels or other places with walls, you can often hear strange noises.
As a symptom, the abnormal noise is not related to engine speed and only occurs when the transmission is rotating.
It comes out even when you shift to neutral gear while driving.


