hard work - I got an expert to fit my rear speakers on my old 924.

This is really easy. I had to remove the rear window a month ago because I
locked the keys in the car. (closing the right door last was not very smart
of me).

What I did was with a big flat screwdriver starting to pry at the front top
corner and working it down. Use something soft around the screwdriver to
prevent damaging the paint. Use 2 screwdrivers makes the work easier. Just
don't force too much space just enough to prevent the window for popping
back.

If you can push from the inside the window comes out really easy.

Putting it back in is some work bit not too difficult. I start from the rear
and finish with the front. The front lower corner i do as last part.

good luck

Paul

I just changed the rear speakers in an 87s - didn't remove window, only
removed two screws at front of panel, bent panel back just a little and used
a short phillips to remove screws.  Made a masonite plate to which I
attahced new 6.5 inch round speakers, used urethane adhesive to affix the
panel to the metal of the body and screwed it back together - huge
improvement over those crummy little speakers that come in teh car.  You do
need a good pattern to start with for the panel though.

I did this awhile ago.  Get yourself a package of the yellow braided
nylon rope (from Home Depot or something, like $3).  I believe the size
I used was 3/16" or 1/4" diameter.  If you do this on a hot day it will
be easier as the gasket will play along much nicer.  The inside is a
lip that fits not only over the body, holds the glass, and also tucks
in the leather/vinyl interior material that is around the window well.
I took a wide flathead screwdriver and wrapped a good bit of electrical
tape around the tip to protect the glass and interior material in case
of slip.  Using this, I wedged the rope in the grove.  You can use your
fingers to pull down the lip of the gasket and put pressure on the
glass with your hand on the inside pushing out.  Once you've got the
rope around it, it will let you start (best is upper corner) to push
the gasket out and at the same time, use the rope to help pull the
gasket down as you continue to push the window out.  It sounds like a
lot but the whole process took me about 10 minutes per window.  You may
need to use the screwdriver (very carefully!) to help pry the initial
part of the gasket lip out.  If you watch the outside black trim
moulding around the window, it will give you an idea of how far you've
moved.  Reinserting uses the same exact procedure but you wrap the rope
around the gasket prior to inserting (lower rear-facing corner is best)
it over the lip of the window opening.  Pull the rope very slowly
around the bottom first (long horizontal edges like that seem harder to
tuck in, so start there first).  Be sure to keep the interior material
tucked into the gasket lip while you continue to feed the lip back into
the inside of the car.  Work your way around both bottom corners, then
up both sides equally (it will get progressively easier).  Finally at
the top, just move slowly to get the rope out and around the top
corner.  Doing this, you can't tell I ever touched the window and
bottomline, it protected the gasket (avoiding yet another costly part).

PS> Grab an old blanket or something to lay outside the car as you do
this.  You'll be glad if you accidentally slip, or like I almost did,
push hard enough at the end that the window literally popped out and I
didn't have a good hold on it.

I replaced my rear speakers without removing windows.
Just have to be careful about bending back the interior panel.
Gotta use a short,stubby phillips screwdriver to remove & install speakers
and plugging wires on is a bit of a pain...but never even considered
removing windows !