Hello Michael Helfter,
Welcome to FIXYA...
Mine is a
2004 Lincoln Navigator... but I
believe they are essentially the same vehicle (my only caveat).
2017 Ford Expedition Navigator Factory Wiring Schematic Manual eBay
For my purposes... (adding a
rear-view camera
onto the FACTORY navigation system)...
leaving the seats, panels and carpeting were not
an issue (easy access).
I believe (again) the
sides pop right out...
But first check along the floor edge and all
the way up tp the where the CONSOLE intersects
with the firewall for any screws...
Finding no screws... work your FINGERS under the
bottom edge and
pull gently (as you would to loosen
a door clip)... Reassembly becomes obvious when
looking at the parts... It all goes together in seconds.
The center of the panel comes out more by lifting
than pulling (again... GENTLE pressure is enough to
get it apart.
Hope this helps.
Carnac the Magnificent