Before mounting
If the rear seat backrests are adjustable:
Before mounting child restraint fixing systems, return all of the rear seat backrests to the basic position.
See also:
BMW Maintenance System
The maintenance system directs you to required
maintenance measures and thereby supports
you in maintaining road safety and the operational
reliability of the vehicle. ...
Switching on/off manually
Press the button.
On: the LED lights up.
Off: the LED goes out.
...
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 ...