See also:

Functional readiness of the airbag system
When the ignition is switch on, the warning lamp in the instrument cluster lights up briefly and thereby indicates the operational readiness of the entire airbag system and the belt tension ...

Folding forward
Press the button, arrow 1, and fold the head restraint forward. ...

Unbuckling the belt
1. Hold the belt firmly. 2. Press the red button in the belt buckle. 3. Guide the belt back into its reel. ...