yup, sorry for that i've updated the other thread.
I went again to the seat garage, and i convinced the tech that it's from the steering wheel, and he agreed so he removed the center of the steering wheel and the RATTLING was gone.
the bad news is that the whole center part has to be replaced and it's very costy for me since i don't have warranty.
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rattling from B-pillar at driver side, u've to remove the plastic part between the front and rear doors inside the cabin which is covering the seat belt, u'll find 2 metal clips loose and clicking the car's body, just cover it with anything and it make it firm and it won't rattle any more.
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