I want to add some dampening material (probably raamat) to the rear deck of my tsx since it seems to be vibrating and rattling a lot back there. Anyone have any idea how to remove the rear deck/parcel shelf ?

 

It's not hard, but somewhat time consuming. I think there are one or two old posts concerning this, you might want to check. From what I can remember, you need to take out the rear seat, side seat bolsters, speaker covers, high mount stop light cover, c-pillar trim pieces, and disconnect the middle seat belt, then the deck cover (which is that felt covered cardboard and the hard plastic trim piece between the seats and the deck, together) is held in by a few obvious screws and a few non-obvious pop clips. Don't go overboard with the damping though, there isn't a whole lot of space between the deck and the cover, if you use too much, it won't go back on.