The vehicle's front and rear seats have adjustable head restraints. The head restraints provide comfort for passengers, but more importantly they are designed to help protect passengers from whiplash and other neck and spinal injuries during an accident, especially in a rear impact collision.
WARNING
To reduce the risk of serious injury or death in an accident, take the following precautions when adjusting your head restraints:
NOTICE
To prevent damage, NEVER hit or pull on the head restraints.
Hyundai Elantra AD (2016-2020) Owners Manual: Manual Heating and Air Conditioning
The heating and cooling system can be controlled manually by pushing buttons
other than the AUTO button. In this case, the system works sequentially according
to the order of buttons selected.
When pressing any button except the AUTO button while using automatic operation,
the functions not s ...
Hyundai Elantra AD (2016-2020) Service Manual: Input Speed Sensor Specifications
Specifications
? Type: Hall effect sensor
? Specifications
ItemsSpecificationsOperation condition [°C(°F)](-40 ~ 150) -40 ~ 302Output voltage(V)High1.18 ~ 1.68Low0.59 ~ 0.84
...