Shift lock system
Shifting the transmission from P (Park) into R (Reverse)
To shift the transmission from P (Park) into R (Reverse):
If the brake pedal is repeatedly engaged and released with the shift lever in the P (Park) position, a chattering noise near the shift lever may be heard. This is a normal condition.

Always fully depress the brake pedal before and while shifting out of the P (Park) position into another position to avoid inadvertent motion of the vehicle which could injure persons in or around the vehicle.
Overriding the shift lock

If the shift lever cannot be moved from the P (Park) position into R (Reverse) position with the brake pedal engaged, continue engaging the brake, then do the following:
If the shift lever does not move even after performing this procedure, have your vehicle inspected by an authorized Kia dealer immediately.