I did some moving, of the stabilizer bar and the shock absorber, at 0 km/h, and could reproduce the sound! It looks like indeed the inner part and outer part touch each other! See the video, at the end I clearly can reproduce the sound I have on the street, by twisting the stabilizer bar, pity I did move my camera at the middle of the recording, but I think the situation is clear.
I will have to ask my dealer and/or Ineos to solve this, because this is most annoying!
@DCPU : I saved some money, I will not buy a trolley jack.