2007 Volvo S80 Owner's Manual - Page 143

NOTE The red warning light may be difficult to see in strong sunlight or when sunglasses are being worn. WARNING Cruise control only warns of vehicles detected by the radar sensor, see page 146. In some cases there may be no warning or the warning may be delayed. The driver should always apply the brakes when necessary. Automatic deactivation Adaptive cruise control is linked to other systems such as the stability and traction control system (DSTC). If any of these systems are not functioning properly, adaptive cruise control is automatically deactivated. In the event of automatic deactivation a signal will sound and the message Cruise Control Canceled is shown in the display. The 146 04 Comfort and driving pleasure Adaptive Cruise Control-ACC driver must then intervene and adapt the vehicle's speed to the surrounding traffic. Automatic deactivation may be caused if: the vehicle's speed falls below 20 mph (30 km/h) the wheels lose traction or if the anti-lock brake system is activated brake temperature is high engine speed (rpm) is too low the radar sensor is obstructed by, for example, wet snow or rain. The radar sensor and its limitations The radar sensor is used both by the adaptive cruise control and the collision warning system. It is designed to detect vehicles or larger vehicles driving in the same direction as your vehicle. The radar sensor does not detect pedestrians, or oncoming, slow or stationary vehicles and objects. Warnings are not given and the brakes are not applied in such cases. WARNING Accessories or other objects must not be installed in front of the grille. Modification of the radar sensor could make its use illegal. The radar sensor's capacity to detect vehicles ahead is impeded: if the radar sensor is obstructed and cannot detect other vehicles, for example in heavy rain, or if snow or other objects are obscuring the radar sensor. NOTE Keep the area in front of the radar sensor clean.