To use the armrest, pull it forward from the seatback.
Kia Cee'd JD Service Manual: Assist Handle Components and components location
Component Location
1. Assist handle
...
Kia Cee'd JD Owners Manual: Non-operational conditions of
parking assist system
Parking assist system may not operate
normally when:
1. Moisture is frozen to the sensor. (It will
operate normally when moisture
melts.)
2. Sensor is covered with foreign matter,
such as snow or water, or the sensor
cover is blocked. (It will operate normally
when the material is remo ...