Rear Seat Belts Questions

As a result, I had to let the 2 passengers to take another car because the seat belts were not working. After I arrived home and parked the car in the garage, I checked the seatbelts after a couple of hours and they worked normally.
Is this normal to Mercedes vehicles?
not sure if it would help, but you could do a system/throttle reboot, that typically helps any little kinks i have with my car like the audio not working, etc.



