If the law requires a seat belt for all passengers it is the drivers responsibility and the ticket will be issued to the driver.
i have an 1987 190E which comes with an airbag
Mine jams all the time. Pulling it won't work. But the rear part of the belt the part that is behind you that goes thru the loop. if you pull it up and let it go fast, the belt part frees up. The Cinch button does nothing to help.
Push on the bottom of the bench seat to release the clips (have to push hard)
Lift bench out
You will see either clips or bolts holding the rear of the seat Release these and lift rear of seat up to release upper clips to remove seat back
One option to reset is to disconnect the positive (+) battery cale on the battery for 3 minutes. Then reconnect it , this will reboot the computer and the light.
SORRY: It doesnt work on the Nissan 2003 350z to do this.