Go here and have a look at the exploded views and fixing arrangements.

http://www.realoem.com/bmw/select.do?vin=&kind=P&series=E38&body=Lim&model=740i&
zone=ECE&arch=0

However, most have pop out covers and on the Rover the small speaker popped out
and there were screws hidden there and the door handle (inside) trim slid off to
expose another screw.

The door trim itself usually pops off via plastic pins that push into either
compatible sockets or the door metal.  Wide flat blade metal is easy to slid
between door metal and trim and easier to flip the studs out if forked. I used
to use acrylic (Plexiglas or lexan) as there is less chance to damage the paint.

On Jun 19, 12:52 pm, trad...@optonline.net wrote:

I find that a 10-lb axe works well.  Get the one with the wooden
handle for comfort.  Real handy, too, when you get a yen to play a
tatoo on that overpriced hood after something that should not break,
breaks.

I DO NOT HAVE AN X5 ...

When I set about to remove a door panel, I take all of the screws out first.
these are typically located in or near the hand holds, and by the door
handle/opening lever. Then I use a putty knife and slip it between the panel
and the door and gently pry the plastic clips free from the door. I like to
be very careful to not break the plastic/nylon clips, but if you need to buy
replacements, you can get them from the dealership for about $0.75 each. (I
buy them in the 10-pack.)

When you get all of the clips free from the door, the panel will be left
hanging by the window sill, and you should be able to simply lift it off.

I do not have an X5, but I do have an E36 (my second one) that I've taken
the door panels off of. I can't imagine that the X Series and the other cars
are remarkably different.