Buick 2015 Regal Owner's Manual page 224

Press and hold RES+ up until
the desired set speed appears
on the display, then release it.
To increase vehicle speed in
small increments, briefly press
RES+. For each press, the
vehicle goes to the next 5 km/h
(1 mph) faster mark on the
speedometer.
When it is determined that there is
no vehicle ahead or the vehicle
ahead is beyond the selected
following gap, then the vehicle
speed will increase to the set speed.
The speedometer reading can be
displayed in either English or metric
units. See Instrument Cluster
(Uplevel Cluster) on page 5-12 or
Instrument Cluster (Base Level
Cluster) on page 5-8. The increment
value used depends on the units
displayed.
Reducing Speed While ACC is at a
Set Speed
If ACC is already activated, do one
of the following:
Use the brake to get to the
desired lower speed. Press
SET down and release the
accelerator pedal. The vehicle
will now cruise at the lower
speed.
Press and hold SET down until
the desired lower speed is
reached, then release it.
To decrease the vehicle speed in
small increments, briefly press
SET . For each press, the
vehicle goes to the next 5 km/h
(1 mph) slower mark on the
speedometer.
Driving and Operating
The speedometer reading can be
displayed in either English or metric
units. See Instrument Cluster
(Uplevel Cluster) on page 5-12 or
Instrument Cluster (Base Level
Cluster) on page 5-8. The increment
value used depends on the units
displayed.
Selecting the Follow Distance Gap
When a slower moving vehicle is
detected ahead within the selected
following gap, ACC will adjust the
vehicle's speed and attempt to
maintain the follow distance gap
selected.
Press on the steering wheel to
adjust the following gap. When
pressed, the current gap setting
displays briefly on the instrument
cluster. Subsequent presses cycle
the gap button through three
settings: Far, Medium, or Near.
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