Kia Optima: Auto door lock/unlock feature (if equipped)

Impact sensing door unlock system (if equipped)

All doors will automatically unlock when an impact causes the air bags to deploy. ...

Speed sensing door lock system (if equipped)

All doors will be automatically locked after the vehicle speed exceeds 15 km/h (9.3 mi/h). And all doors will be automatically unlocked when you turn the engine off or when you remove the ignition ...

See also:

Instrument panel overview
1. Instrument cluster 2. Light control / Turn signals 3. Wiper/Washer 4. Horn 5. Steering wheel audio control* 6. Auto cruise control* 7. Driver’s air bag 8. Steering wheel 9. Ignition switch* ...

The Importance of Using Safety Belts
There are four very important reasons to use safety belts even with an air bag supplemental restraint system. They: help keep you in the proper position (away from the air bag) when it inflates. ...

Front fog light
Fog lights are used to provide improved visibility and avoid accidents when visibility is poor due to fog, rain or snow etc. The fog lights will turn on when fog light switch (1) is turned to ON ...