Never did any tinting before...cheras perdana service centre. Not rly sure bout the regulator..but 1 things is, if i completely turn down the window, those sound will gone. So..isit the regulator things?.. u got any service centre to recommend that can fix this kind of problem?which service centre and usually the sound come from the regulator - i mean power window motor not properly tighten....or did u fix any tinting? worry they didnt screw on yr door trim properly.