Ok , don't have any myself but , I personally want to know how do you turn off the seat belt chime ,and on the manual, how do you turn off the hilt start assist?
Hill start assist is in your radio settings and can be turned off.
Seat belt chime get in the Jeep, put seat belt on, turn vehicle to Run (don't start) then quickly unbuckle/buckle seat belt at least 3x ending with it buckled. Turn vehicle off you should here 1 chime if successful.
Hill Start Assist thread HERE. Question was asked but not answered. May want to revive that old thread asking but I have a feeling you will need to disable it via the switch each time you start the Jeep.