Hyundai Elantra N Owner's Manual page 364

Increasing set speed
Push the + switch up and release
it immediately. The set speed will
increase by 1 mph (1 km/h) each time
the switch is operated in this manner.
Push the + switch up and hold it while
monitoring the set speed on the
cluster. The set speed will increase to
the nearest multiple of five (multiple
of ten in km/h) at first, and then
increase by 5 mph (10 km/h) each
time the switch is operated in this
manner.
Release the switch when the desired
speed is shown and the vehicle will
accelerate to that speed.
Decreasing set speed
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Push the - switch down and release
it immediately. The set speed will
decrease by 1 mph (1 km/h) each time
the switch is operated in this manner.
Push the - switch down and hold it
while monitoring the set speed on the
cluster. The set speed will decrease to
the nearest multiple of five (multiple
of ten in km/h) at first, and then
decrease by 5 mph (10 km/h) each
time the switch is operated in this
manner.
Release the switch at the speed you
want to maintain.
Accelerating temporarily
If you want to speed up temporarily
when Cruise Control is on, depress the
accelerator pedal.
To return to the set speed, take your foot
off the accelerator pedal.
If you push the + switch up or - switch
down at increased speed, the set speed
will be set to the current increased
speed.
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