Is it all fixed now?
Curious to know if you got the water/air leak fixed and the seat belt retractor mechanism working as it should? Did you get the gear OK and does it look OK to you. When installing it be careful of the position of the microswitches and to return them to the same place. Operate the retractors by opening and closing the door a few times. If you ever open the passenger door and close it then return later to drive the car, the pass. seat belt will operate with no one there!
It knows the door was opened, even overnight