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. ...

Vehicle storage
If your vehicle is to be decommissioned for longer than three months, your BMW center or a workshop that operates according to BMW specifications will be glad to advise you. ...

Notes
Always make sure that safety belts are being worn by all occupants before driving away. Although airbags enhance safety by providing added protection, they are not a substitute for safety belts ...