Good evening!
Maybe someone has encountered such a sound. w205 m264.
Constant squeaking + short-term chirping or clanking for 1-3 seconds, then disappears and repeats again. In the video, you can hear it at 6-7 seconds.
All attachments are new (belt, bypass roller, tensioner, crankshaft pulley).
They sentenced the nozzle - changed it, the sound remained.
The pump was turned off, the starter generator was removed and diagnosed - it is working. No one can find the sound.

 

Hmmm, that engine is too new to have a pulley or belt go already unless you drive a lot, at which side is the sound the loudest and does RPM, temperature and humditity affect it at all?

 

On a cold one, the sound is more pronounced, but the squeak is almost always present, the crankshaft pulley was changed because the masters said that it was a hinged one. It's hard to say about the speed, when driving, the sound is not audible, it can be heard at idle.

 

Which side is it the loudest again?

 

I can hear the sound from the left side, but the masters said that the sound is also present from the front. It blows up pretty much everywhere if you listen through a stethoscope. But on the left there is only a pump and a turbine, we turned it off in turn and the sound did not disappear

 

Hmmm, I don't quite know what it is then, I am sorry : (

 

Hello wondering if you found out what your noise is or was?