The instrument panel vent air flow can be directed up/down or left/right using the vent adjustment lever.
The air flow can also be closed using the vent adjustment lever. To close the instrument panel vents, slide the vent adjustment lever to the LEFT until it clicks.
Hyundai Elantra AD (2016-2020) Service Manual: Components and Components Location
Component Location
1. Sunroof2. Sunroof switch3. Sunroof motor & controller
...
Hyundai Elantra AD (2016-2020) Owners Manual: Additional Safety Precautions
Passengers should not move out of or change seats while the vehicle is moving.
A passenger who is not wearing a seat belt during a crash or emergency stop can
be thrown against the inside of the vehicle, against other occupants, or be ejected
from the vehicle.
Do not use any accessories on s ...