Kia EV9 2023 Owner's Manual page 454

Driver assistance guide
For example, if you drive at 90 km/h (56 mph), the distance is maintained as follows:
僅 Distance 4: approximately 52.5 m (172 ft.)
僅 Distance 3: approximately 40 m (130 ft.)
僅 Distance 2: approximately 32.5 m (106 ft.)
僅 Distance 1: approximately 25 m (82 ft.)
NOTE
The distance is set to the last set distance when the vehicle is restarted, or when Smart
Cruise Control was temporarily canceled.
Increasing set speed
僅 Push the (+) switch up and release it immediately. The set speed will increase by 1 km/h
(1 mph) each time the switch is operated in this manner.
僅 Push the (+) switch up and hold it. The set speed will increase by 10 km/h (5 mph) each
time the switch is operated in this manner.
You can increase the set speed to 160 km/h (100 mph).
WARNING
Check the driving condition before using the (+) switch. Driving speed may sharply
increase when you push up and hold the (+) switch.
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OMV073012L
Smart Cruise Control (SCC)