Hyundai Sonata LF 2014-2019 Service Manual: Emergency Fastening Device (EFD) Repair procedures
Removal
1.
Disconnect the battery negative cable and wait for at least 3 minutes before beginning work.
2.
Remove the front seat.
(Refer to Body - "Front Seat Assembly")
3.
Remove the rear seat.
(Refer to Body - "Rear Seat Assembly")
4.
Remove the front anchor seat belt (A).
...
Hyundai Sonata LF 2014-2019 Owners Manual: Headlamp delay function
If the key is removed from the ignition switch or placed in the ACC position
or the LOCK/OFF position with the headlamps ON, the headlamps (and/or parking lamps)
remain on for about 5 minutes. However, if the driver’s door is opened and closed,
the headlights are turned off after 15 seconds. Ho ...