Filter Inspection
The climate control air filter should be replaced according to the Maintenance Schedule. If the vehicle is operated in severely air-polluted cities or on dusty rough roads for a long period, it should be inspected more frequently and replaced earlier. When you replace the climate control air filter, replace it performing the following procedure, and be careful to avoid damaging other components.

1. With the glove box open, remove the stoppers on both sides to allow the glove box to hang freely on the hinges.

2. Remove the support rod (1).

3. Press and hold the lock (1) on both sides of the cover.
4. Pull out (2) the cover.

5. Replace the climate control air filter.
6. Reassemble in the reverse order of disassembly.
NOTICE
Install a new climate control air filter in the correct direction with the arrow symbol (↓) facing downwards, to prevent noise and reduce effectiveness.
Air Cleaner
Wiper Blades. Blade ReplacementHyundai Elantra AD (2016-2020) Owners Manual: Cruise SET Indicator Light, Cruise Indicator Light
Cruise SET Indicator Light (for conventional cluster, if equipped)
This indicator light illuminates:
When the cruise control speed is set.
For more information, refer to "Cruise Control System" in chapter 5.
Cruise Indicator Light (for supervision cluster, if equipped)
This indica ...
Hyundai Elantra AD (2016-2020) Owners Manual: Climate Control Additional Features
Automatic Ventilation (if equipped)
When the ignition switch is in the ON position or when the engine is running
and temperature is below 59°F (15°C) with the recirculated air position selected
more than five minutes, the air intake position will automatically change to the
outside (fresh) ...