Buick Regal 2014 Owner's Manual page 226

9-44 Driving and Operating
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.
The speedometer reading can be
displayed in either English or metric
units. See
or
. 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.
Since each gap setting corresponds
to a following time (Far, Medium,
or Near), the following distance will
vary based on vehicle speed. The
faster the vehicle speed, the further
back your vehicle will follow a
vehicle detected ahead. Consider
traffic and weather conditions when
selecting the following gap. The
range of selectable gaps may not be
appropriate for all drivers and
driving conditions.
Changing the gap setting
automatically changes the alert
timing sensitivity (Far, Medium,
or Near) for the Forward Collision
Alert (FCA) feature. See
.
Alerting the Driver
If ACC is engaged, driver action
may be required when ACC cannot
apply sufficient braking because of
approaching a vehicle too rapidly.