The above situations are normal conditions when the active eco system is activated to improve fuel efficiency.
Active ECO operation
Limitation of Active ECO operationKia Cee'd JD Owners Manual: To cancel cruise control, do one
of the following
Depress the brake pedal.
Depress the clutch pedal if equipped
with a manual transaxle.
Shift into N (Neutral) if equipped with
an automatic transaxle.
Press the O (Cancel) button located on
the steering wheel.
Decrease the vehicle speed lower than
the memory speed by 20 km/h ...
Kia Cee'd JD Service Manual: Master Cylinder Repair procedures
Removal [LHD]
1.
Turm ignition switch OFF and disconnect the negative (-) battery cable.
2.
Remove the battery.
(Refer to Engine Electrical system-"Battery")
3.
Remove the ECM.
...