Spare buttons - and re-using one

[E14STO]

I’ve had 3 RS4’s now and there have always been 2 unused buttons next to the “P” button.
What options are these (just curious)

I’d like to put a automatic garage button on one but not sure if it’s possible.
I have a switch from an old car that I keep in the side panel (it’s my old 997 switch)
I basically pulled the fob apart and wired it into the switch.

They of course don’t pop in / out so any ideas what I might need?

[Dew]

I think one is the Sport button if Multi-function wheel is fitted

[Daytona]

And rear blind if it’s a saloon