Adjusting the height: electrical
The head restraints on the left and right rear passenger seats extend automatically whenever a passenger in the rear seat fastens his or her safety belt.

In addition, the height of the head restraint can be adjusted electrically.
Extending the head restraint
To prevent possible personal injury and property damage, always ensure that the area above the head restraints is clear and unobstructed before extending them upward.
The height adjustment of the head restraint is deactivated when the safety switch for the rear windows, has been pressed.
See also:
Fuel gauge
The vehicle inclination may
cause the display to vary.
Notes on refueling. ...
BMW Maintenance System
The maintenance system directs you to required
maintenance measures and thereby supports
you in maintaining road safety and the operational
reliability of the vehicle. ...
Safety
Besides options like lane departure warning, the 5 Series comes equipped with
a suite of side curtain airbags and front-seat side-impact airbags. Rear
seat-mounted airbags can be ordered as a $385 ...
