

Curtain air bags are located along both sides of the roof rails above the front and rear doors.
They are designed to help protect the heads of the front seat occupants and the rear outboard seat occupants in certain side impact collisions.
The curtain air bags are designed to deploy during certain side impact collisions, depending on the crash severity.
The side and curtain air bags on both sides of the vehicle may deploy if a rollover or possible rollover is detected.
The curtain air bags are not designed to deploy in all side impact or rollover situations.
WARNING
To reduce the risk of serious injury or death from an inflating curtain air bags, take the following precautions:
Side air bags
How Does the Air Bag System Operate?Hyundai Elantra AD (2016-2020) Owners Manual: Smart Cruise Control Switch
CRUISE: Turns cruise control system on or off.
RES+: Resumes or increases cruise control speed.
SET-: Sets or decreases cruise control speed.
: Sets vehicle-to-vehicle distance.
CANCEL: Cancels cruise control operation. ...
Hyundai Elantra AD (2016-2020) Owners Manual: Auto Door Lock/ Unlock Features
Impact sensing door unlock
All doors will be automatically unlocked when an impact causes the air bags to
deploy.
Speed sensing door lock
All doors will be automatically locked when vehicle speed exceeds 9 mph (15 km/h).
All of the doors will be automatically unlocked after the engine is turne ...