Hyundai sonata Owner's Manual page 408

While Driving
Speed setting
Automatic speed setting mode
The system enters the automatic speed
setting mode when:
1. The operating conditions are satisfied
-
indicator will illuminate
green
2. Smart Cruise Control set speed and
the highway speed limit matches
If the system changes to the automatic
speed mode, the symbol will turn
green and a chime will sound.
When the highway speed limit changes,
the set speed automatically changes to
the changed speed limit.
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Manual speed setting mode
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If the speed is set manually using the
RES+ or SET- toggle switch on the
steering wheel, the set speed on the
cluster will turn white and the 'AUTO'
symbol will disappear.
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