See also:

Audio control buttons (if equipped)
These buttons are located on the spokes of the steering wheel. They allow the driver to control audio functions without taking his/her hands off the steering wheel. ...

For U.S.A
The following information has been compiled according to Code of Federal Regulations “Title 49, Part 575”. ...

Automatic/Emergency Locking Retractor (A/ELR)
Each passenger’s seatbelt has an Automatic/ Emergency Locking Retractor (A/ ELR). The Automatic/Emergency Locking Retractor normally functions as an Emergency Locking Retractor (ELR). The A/ ELR has a ...