See also:

Operational readiness of airbag system
Operational readiness of airbag system In the radio ready state and beyond the warning lamp comes on briefly to indicate that the entire airbag system and the belt tensioners are operational. ...

Screw thread
Push out the cover by pressing on the top edge. ...

Remove attached parts following use
Remove auxiliary mirrors, roof or rear luggage racks which are no longer required following use. Attached parts on the vehicle impair the aerodynamics and increase the fuel consumption. ...