Hyundai Elantra MD/UD: Panic (4) - Remote keyless entry system operations - Remote keyless entry (if equipped) - Features of your vehicle - Hyundai Elantra MD 2010-2015 Owners manualHyundai Elantra MD/UD: Panic (4)

The horn sounds and hazard warning lights flash for about 30 seconds if this button is pressed for more than 1.5 second. To stop the horn and lights, press any button except the trunk button on the transmitter

Trunk unlock (3)
The trunk is unlocked if the button is pressed for more than 1 second. Also, once the trunk is opened and then closed, the trunk will be locked automatically. ...

Transmitter precautions
✽ NOTICE The transmitter will not work if any of following occur: The ignition key is in ignition switch. You exceed the operating distance limit (about 90 feet [30 m]). The battery in ...