See also:

Active front head restraints
In the event of a rear-end collision of sufficient severity, the active head restraint reduces the distance to the head. Reduced protective function ▷ Do not use seat or head restraint c ...

Tone
The sound settings are stored for the remote control currently in use. ...

Switching off automatically
The system switches off and the LED goes out: After approx. 160 ft/50 m when driving forward. Above approx. 22 mph/36 km/h when driving forward. Switch on the system again if necessary. ...