See also:

Activating HDC
Press the button; the LED above the button lights up. ...

Activating/deactivating the limit
1. "Settings" 2. "Speed" 3. "Warning" ...

Removing
Only remove the head restraint if no one will be sitting in the seat in question. 1. Pull the head restraint upward as far as possible. 2. Press the button, arrow 1, and pull the head restrain ...