

To lock the doors, press the button on the outside door handle while carrying the Smart Key with you or press the Door Lock button on the Smart Key.
Press the button on the driver's outside door handle while carrying the Smart Key with you or press the Door Unlock button on the Smart Key, the driver's door will unlock. If you press the button on the front passenger's outside door, all doors will unlock.
Once the doors are unlocked, they may be opened by pulling the door handle.
When closing the door, push the door by hand. Make sure that doors are closed securely.
Information
Door Locks
Operating Door Locks from Inside the VehicleHyundai Elantra AD (2016-2020) Service Manual: Seat Heater Components and Components Location
Component Location
[Front Seat Heater (Non-Air ventilation)]
[Front Seat Heater (Air ventilation)]
[Rear Seat Heater] ...
Hyundai Elantra AD (2016-2020) Service Manual: Compressor oil Repair procedures
Oil Specification
1.
The HFC-134a system requires synthetic (PAG) compressor oil
whereas the R-12 system requires mineral compressor oil. The two oils
must never be mixed.
2.
Compressor (PAG) oil varies according to compressor model. Be sure to use oil specified for the model of compress ...