As ALOHART says, the BimmerCode app allows you to change/enable/disable lots of features on your i3. For example, in addition to coding my gas tank capacity and REX SOC start percentage, I also coded mine to remote climatize with the panic button on the remote and to automatically fold and unfold the mirrors when the doors are locked/unlocked. Lots of other stuff you can do as well. Once you get the app you can browse through the menus and take a look at the options and see if anything grabs your attention. I used the same app to make some nice changes to my wife's 535i xDrive as well.
2014 BMW i3 with Range Extender Engine, Capparis White/Frozen Black, 20" wheels,, Giga World, Tech + Driving Assist, Parking Assist, DC Fast Charging, TurboCord EVSE