Part 1 BMW X6 f16 tweet/chirp/squeak? Rear wheel driver side

[Technonerve]

Hey everybody, I am new to the forum, I wonder if someone can help me, I purchased 3 weeks ago a bmw f16 x6 2018 xdrive 35i with M sport package (and suspension) odometer 740KM today, I am experiencing a very annoying sound from the rear wheel driver side region which sound like a cricket or bird tweet, very short, on very sharp bounces of the wheel on uneven roads or bumps, u can hear it more in closed parking areas, or on roads where u have barriers on the sides. I can't replicate the noise on bouncing the heavy sav, I'm definite it's coming from the rear wheel area and it's not from the interior because when windows are closed I can't hear it. It doesn't disappear when brake is on. I took twice to bmw, first time the mechanics didn't hear it (I did) and he said I'm not sure what u r describing to be able to work on it. Second time I took it I makes sure another mechanic drove the car and heard it, he said it's not the suspension, continue in part 2