I eventually got everything set up, and have the yellow button display on my handlebars. There seems to be no explanation as to what the settings P0 TO P5 actually are. I have tried different ones but can't see any benefit.

Also when I am on an incline I still struggle without changing down a gear, therefore i am not sure the power assist works. I have a full throttle for inclines but that can drain the battery if used too much.

Any thoughts?