Next we removed the stereo from the dash, first we removed the top cover over the screen levering it from the back with a padded screwdriver, next we removed the panel below the main unit and above the temperature controls.
This is done by carefully placing flat blade screwdriver along the top edge, the catch that holds it in is located at the middle of the top edge. Lever this very carefully so not the break the catch.
Finally to remove the main unit we had to first undo the four screws at the top of the unit. Two of them are 7mm hex head bolts and two of them are torx size T25.
Once the bottom panel is out you can then pull the main unit surround out. The catches that hold this in are along the bottom edge. You can pull these straight back, no need for any tools at this stage, the catches are quite stiff but it is only them (after the top screws have been removed) that are holding the unit in.
do you happen to have any more photos of this part of the process?