Two people (including children) should never attempt to use a single seat belt. This could increase the severity of injuries in case of an accident.
Kia Cee'd JD Service Manual: Back-up Lamp Switch Description and operation
Description
•
Detects the shift operation to the reverse gear.
•
When the transaxle is in the reverse condition, the reverse shift rug
turns the back-up lamp switch onby pressing a shaft part of the switch.
...
Kia Cee'd JD Owners Manual: The LDWS may not warn you even
if the vehicle leaves the lane, or
may warn you even if the vehicle
does not leave the lane when
The lane is not visible due to snow, rain,
stain, a puddle or many other things.
The brightness of the outside changes
suddenly.
Not turning on the headlight even at
night or in the tunnel.
Difficult to distinguish the color of the
lane from the road.
Driving on a steep grade ...