don't forget charger/adapter/batteries for all electronic "toys".
if you are going on your own, a camera/camcorder tripod will help.
cloth will help to apply rejex, rain-x, etc.
you might want to bring some tire cleaning/shining/polishing products.
leather cleaner/conditioner.
california mini duster/swiffer to remove the interior dust.
sunglasses to "test" the hud.
your cell phone to test out the bluetooth.

have a wonderful time !