Re: Unbearable parcel shelf squeak!
IIRC the speaker grille just has to be popped off to access the offending screw, then its just a matter of getting a screw driver in there, access is a bit tight because of the back window sloping.
If its the parcel shelf, its more hassle, the base of the rear seat has to be popped up and out, to spring clips near where the base meets the carpet, needs a good yank to unclip both sides. Then the rear seat upright has to come out, two bolts at the bottom, on the rear wheel arch, then lift up off a couple of brackets. The parcel shelf is held on with a series of screws and a single nut/stud that has to be undone from inside the boot. Only other watch out is the high level brake light, I cannot remember how I got that out, sorry, think it just needed the wire taking off.
Hopefully it can be got at from the speaker grille.