2015 Buick Regal Owner Manual - Page 224

Driving and Operating . 9-43 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. Reducing Speed While ACC is at a Set Speed If ACC is already activated, do one of the following: . . 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. 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 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 3 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. . .