i was facing same issue went to dealership as well they are really unaware of this (faw rwp).The remedy which they were providing is to insertd ouble tape or wrapped cloth between glass and rear trunk plastic cover.
annoyed coz of this next day I just opened that cover and figured out that its end is not properly inserted at its DEFINED place .(curved plastic d shaped) .i just tucked it at its place and Now its almosf gone.
i am facing screeching sound in driving seat where back rests (back supporting portion).i have driven only 700 kms till now.any solution for said prob plz?