Adjusting the front seat luxury head restraints mechanically
WARNING Risk of injury if vehicle settings are adjusted while the vehicle is in motion
You could lose control of the vehicle in particular in the following situations:
If you adjust the driver's seat, the head restraints, the steering wheel or the mirror while the vehicle is in motion.
If you fasten your seat belt while the vehicle is in motion.
Before starting the engine: adjust the driver's seat, head restraints, steering wheel and mirror in particular and fasten your seat belt.
WARNING Risk of injury due to incorrectly adjusted head restraints
If head restraints have not been adjusted correctly, there is an increased risk of injury in the head and neck area, e.g. in the event of an accident or sudden braking.
Before driving off, make sure for every vehicle occupant that the centre of the head restraint supports the back of the head at about eye level.
Adjust the head restraint fore-and-aft position so that it is as close as possible to the back of your head.
To move forwards:
pull the head restraint forwards. To move backwards:
press release knob 
and push the head restraint backwards.