Ah, so it means "boot independence / indipendent". I confirm, it works this way.
And the other about "speed lock", locks the doors at 20 km/h.
Testing that option, I discovered a strange behavior of boot lock. How does it work? Are there two locking devices?
In all other cars I know about, the boot can be locked or unlocked. If it's locked, it's firm; if it's unlocked, you can pull it up.
In this, when boot is locked/unlocked together with other doors, it's like the other cars: you squeeze the lever, you hear the switch and then you can pull.
But when boot is indipendent (or when you want to open only that), this happens:
-You push remote button, you hear some noise and you see the boot moving slightly.
But in this state, if you try to pull it, it moves a couple of cm and then it stops. It's free to move along that little space, unlocked from something but locked by something other.
Then:
-You squeeze the handle, and you can pull the boot.