To keep the locks from freezing, squirt an approved de-icer fluid or glycerine into the key opening. If a lock is covered with ice, squirt it with an approved de-icing fluid to remove the ice. If the lock is frozen internally, you may be able to thaw it out by using a heated key. Handle the heated key with care to avoid injury.
Check spark plugs and ignition
system
Use approved window washer
anti-freeze in systemKia Cee'd JD Service Manual: Rear Door Latch Components and components location
Component Location
1. Rear door latch
...
Kia Cee'd JD Service Manual: Hands Free Mic Repair procedures
Inspection
1.
Disconnect the negative (-) battery terminal.
2.
Remove the roof trim assembly.
(Refer to Body - "Roof Trim Assembly")
3.
Remove the hands free mic (A) after disconnecting ...