A4 B8 weird noise

[ilky]

Hello,

Sorry for creating a new thread , but I wasn't able to find any similar noise to what I do have inside my car :
https://www.youtube.com/watch?v=OrYvQqfD2-o
I do want to mention that it is a diesel engine car and got this noise after changing the brake fuild with the old classic method by pressing the brakes, changed the servo fuild also without the vaccum pump and changing the winter with the summer tyres. 3 of the 4 tyres are new and the same series, old is old and sh.
The engine noise at idle is this one:
https://www.youtube.com/watch?v=JmHe61a70BA
and the idle sound of the engine inside the car is this one:
https://www.youtube.com/watch?v=e18XzxFa6Fo
I am not looking for issue resolution as I would for sure go to a mechanic,I am looking only for advises,opinions, have you ever had anything similar?

Thank you!

[ilky]

I will answer to my question:D tire noise, bad tire bought to replace one of my old one. Tire was slapping producing that weird noise while running.