Rear Deck 2008 M35X
Begin by removing the backseat already detailed.
Remove the rear metal kickplates. Clips circled in yellow.
Next piece to remove. Clips circled in yellow
So you can see the clips on the actual part. The red is one of those pushbutton clips you have to pull out.
Next piece to remove. (Those two cylinder looking things right below the back window on the pillar look a little "dangerous". I think they have something to do with the airbags so be careful)
So you can see the clips on the actual part. There is a piece at the other end by the tip that latches into the rear deck. Not really a clip, but more of a hook. Once it is unclipped, pull up and forward to unhook it.
Once all of those are removed then the rear deck. Remove the push buttons circled in yellow. The deck is then helled down by clips. I didn't remember to get picks of them, you can see them clearly if you remove the trunk lining. So you will need to pull the deck up a little to unclip it.