The hood on the i3 can be open from both inside and outside the vehicle.
Using the key fob, press the hood open button for approximately one second, the hood will be unlocked and slightly raised.
To open the hood from inside, press the button in the drivers footwell.
Open hood manually
To open the hood manually in case the battery is dead, remove the cover underneath the locking buttons.
Then remove the wire cable and pull it back. The hood will unlock. Once at the hood, reach in and press the tab to release the locking mechanism, and open the hood.