2012 Volvo XC70 Owner's Manual - Page 159

04 Comfort and driving pleasure Adaptive Cruise Control (ACC)* WARNING Accessories or other objects, such as extra headlights, must not be installed in front of the grille. Modification of the radar sensor could make its use illegal. Situations where ACC may not function optimally WARNING • The radar sensor's capacity to detect vehicles ahead is impeded: The radar sensor has a limited field of vision. In some situations it may detect a vehicle later than expected or not detect other vehicles at all. If ACC is not functioning properly, cruise control will also be disabled. • • 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. 04 NOTE Keep the area in front of the radar sensor clean. • if the speed of vehicles ahead is significantly different from your own speed. Radar sensor's field of vision (shown in pink) In certain situations, the radar sensor cannot detect vehicles at close quarters, for example a vehicle that suddenly enters the lane between your vehicle and the target vehicle. Small vehicles, such as motorcycles, or vehicles not driving in the center of the lane may remain undetected. `` * Option/accessory, for more information, see Introduction. 159