Pull the lever towards you. It will return to the normal position when released. The headlight switch does not need to be on to use this flashing feature.
Kia Cee'd JD Service Manual: Cylinder Head Cover Components and components location
Components
1. Cylinder head cover
2. Cylinder head cover gasket
3. Cam position sensor
...
Kia Cee'd JD Service Manual: Components and components location
Component Location
1. Rear defogger relay (Built-in
smart junction box)
2. Windshield deicer switch (Rear defogger switch)
3. Windshield deicer
4. Deicer connector
...