To use the armrest, pull it forward from the seatback.
Kia Niro 2017 (DE HEV) Service Manual: Curtain Airbag (CAB) Module Components and components location
Components
1. Curtain Airbag (CAB)
...
Kia Niro (DE HEV) Owners Manual: Climate control air filter
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 cl ...