2009 Lincoln MKS Owner's Manual - Page 76

Driver Controls Cause The surface of the radar in the grille is dirty or obstructed in some way The surface of the radar in the grille is clean but the message remains in the display Heavy rain or snow is interfering with the radar signals Action Clean the grille surface in front of the radar or remove the object causing the obstruction Wait a short time. It may take several minutes for the radar to detect that it is no longer obstructed Do not use ACC in these conditions because it may not detect, warn, or respond to potential collisions. Do not use ACC in these conditions because it may not detect, warn, or respond to potential collisions. Swirling water, or snow or ice on the surface of the road may interfere with the radar signals WARNING: Do not use ACC when towing a trailer with brake controls. Aftermarket trailer brakes will not function properly when ACC is activated because the brakes are electronically controlled. Failing to do so may result in loss of vehicle control, which could result in serious injury. WARNING: Do not use tires sizes other than those recommended because this can affect the normal operation of ACC. Failing to do so may result in a loss of vehicle control, which could result in serious injury. 76