Black plate (18,1)Cadillac DTS Owner Manual - 2011Alerting the DriverThe ACC alert symbol islocated on the display atthe top of the instrumentpanel to the right of thedriver.The alert symbol flashes and a warning beep soundswhen driver action may be required. If ACC is engaged,the alert symbol will flash when:. ACC cannot apply sufficient braking because youare approaching a vehicle too rapidly.. The vehicle speed drops below about 32 km/h(20 mph).. A temporary condition prohibits ACC fromoperating. See DIC Warnings and Messages onpage 4‑62 for more information.. A malfunction is detected in the system. See DICWarnings and Messages on page 4‑62 for moreinformation.See Defensive Driving on page 5‑2.{ WARNING:Adaptive Cruise Control has only limited brakingability to slow your vehicle. In some cases,Adaptive Cruise Control may not have time toslow your vehicle enough to avoid a collision. Beready to take action and apply the brakesyourself. See Defensive Driving on page 5‑2.Approaching and Following a VehicleThe vehicle ahead symbolis located on the top ofthe instrument panel tothe right of the driver.The vehicle ahead symbol only appears when a vehicleis detected in your path.If this symbol does not appear, or disappears briefly,ACC will not respond to vehicles you may see ahead.4-18