I've done electric window 300's several times. First time takes a little longer because you have to find all the fasteners and figure out how things come apart, maybe 20-30 minutes for skin removal. Now I can do it in ten, maybe less.

You will need to pry out the little plastic insert inside the door handle thingy, then undo the phillips screw in there. There are a couple more easily found phillips screws for the armrest. The chrome surround for the latch mechanism comes off with a phillips, and then you have the snap fasteners all around the door. I'm probably forgetting a screw somewhere in case anybody cares to chime in.

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Whoever said there's nothing more expensive than a cheap Mercedes never had a cheap Jaguar.

83 300D Turbo with manual conversion, early W126 vented front rotors and H4 headlights 401,xxx miles
08 Suzuki GSX-R600 M4 Slip-on 26,xxx miles
88 Jaguar XJS V12 94,xxx miles. Work in progress.
99 Mazda Miata 183,xxx miles.