If you want to speed up temporarily when the cruise control is on, depress the accelerator pedal. Increased speed will not interfere with cruise control operation or change the set speed.
To return to the set speed, take your foot off the accelerator pedal.
Kia Cee'd JD Service Manual: Front Seat Shield Outer Cover Components and components location
Component Location
1. Front seat shield outer cover
...
Kia Cee'd JD Owners Manual: Fuel filter warning light
(Diesel engine)
This warning light illuminates for 3 seconds
after the ignition switch is set to the
ON position and then it will go out. If it
lights up while the engine is running, it
indicates that water has accumulated
inside the fuel filter. If this happens,
remove the water from the fuel filter. ...