Dear OP:
This is my very first post.
I brought LEAF (Chinese version Venucia e30) one year ago.
We don't have the ECO button on the steering wheel instead on the shifter we have "D" and "ECO" mode.
Our "ECO" mode = Your "ECO"+"B"
Our "D" mode = Your "Non ECO"+"D"
And yes the car remember your...