See also:

Removing a child restraint installed with a seat belt
Push the buckle release button and fully retract the seat belt. ...

Active head restraints
When the occupant’s lower back presses against the seatback dur- ing a rear-end collision, the head restraint moves slightly forward and upward to help reduce the risk of whiplash on the seat oc ...

Have the malfunction repaired immediately.
After taking the specified steps to correct the suspected problem, check that the warning message and light go off. ...