2010 Cadillac DTS Owner's Manual - Page 155

How the System Works WARNING: (Continued) LDW uses a camera located between the inside rearview mirror and the windshield to detect the lane markings. LDW will indicate the system is working whenever it detects either the left or right lane marking. So if you depart on the side of the lane that LDW is not detecting, LDW will not warn you. If you do not carefully maintain your vehicle position within the lane, vehicle damage, injury, or death could occur. Even with LDW, always keep your attention on the road and maintain proper vehicle position within the lane. Always keep the windshield clean and do not use LDW in bad weather conditions. When the vehicle crosses a detected lane marking, the LDW symbol will flash and you will hear three beeps. LDW will not warn you if the turn signal is on or if you make a sharp maneuver. Before making a lane change, check the vehicle's mirrors, glance over your shoulder for vehicles and hazards, and start the turn signal before changing lanes. @ (Lane Departure Warning): To turn LDW on and off, press the LDW control, located by the exterior headlamp control. An indicator on the control will light to indicate that LDW is on. When the vehicle is started, the LDW symbol, located in the instrument panel cluster, will briefly come on to indicate that the light is operational. LDW only operates at speeds of 35 mph (56 km) or greater. If LDW is turned on when traveling at these speeds, the LDW symbol will appear green if the system detects a left or right lane marking. 3-47