The navigation system is designed to assist in locating an address or point of interest. XM NavTraffic® requires a monthly service fee and hardware, and is designed to provide real-time traffic or alternative routes of travel. Discrepancies may be encountered between the system and your actual location. Road system changes may affect the accuracy of the information provided. Rely on your common sense to decide whether to follow a specified route. Detailed coverage not available in every city or roadway. Periodic navigation updates available at an additional cost. See your Navigation System Owner's Manual for further details.