been there, done that
sorry no pictures, but its definitely do-able, especially if you've done anything like install a car radio, in fact easier I would think.
this is for the coupe, not GS:
the display screen has thin slots on the sides, nearly hidden by the leather. a very flat blade screwdriver can be used to pry out both sides a little at a time, be careful to cover the leather first. once its loose, unplug the wires.
the area around the shifter (CC) has a tiny hole at the bottom, more like a notch at the bottom of the circular piece that houses the shifter. you need something like a hook to get in there then pull straight up the round shifter unit. if you are not careful, you will chip the finish off the metal here, be careful. even a tiny hook covered with heat shrink would be good. unplug the wires
there are I think a few screws at the top of the metal console at the top behind where the screen was, and a couple more at the bottom under the shifter that you just removed.
unscrew all that.
lift the center console panel out. disconnect the wires that go to the A/C controls and the buttons beneath for the sport, MSP, etc.
take the screen, and the panel indoors spread out a newspaper on the kitchen table. tell wife to shut up.
you will need a very very tiny phillips head the take the back off the lcd unit. the black plastic on mine was extremely brittle, like spun sugar, it did snap. even just tightening the screws too much on re-assembly with snap the circular part that the screw head is on right off! be careful.
the a/c and button units dissassemble with a medium phillips head.
you will eventually get all the buttons completely out. you have to take apart just about everything. as you do it, take careful note of how the units were assembled. the order of the buttons is in the manual but exactly how to re-assemble everything is not. the turn around time is 1 week.
Installation is reverse of removal. I can't stress enough how brittle all the black plastic parts are, do not overtorque anything unless you mean to break it cause you will.
Good luck!
JJ