An optional navigation system with road maps can be built into the vehicle facia.The navigation system provides information on the vehicle''s positon at any time by displaying it on the map and helps the driver reach the required destination.The system also allows information to be easily obtained on services of general interest (hotels, carparks, restaurants, chemists, service stations, hospitals, service outlets, railway stations, airports etc.).An electronic control unit built into the radio system manages the operation of the entire system.A gyroscope located inside the central unit container detects vehicle rotation and allows the maps to be oriented.The central unit container also includes the GPS receiver that processes the GPS (Global Positioning System) functions required by the navigation system:- initial location of the vehicle;- initial sensor self-calibration (odometer and gyroscope);- navigation aid (checking the correct location of the vehicle in relation to the position recorded by the sensors);- synchronisation of the clock inside the central unit;- vehicle localisation in areas not covered by maps and in the event that the vehicle is transported/ferry, train, etc.).An aerial allows GPS (Global Positioning System) satellite localisation of the vehicle:the aerial is connected to a receiver located in the central unit by means of a special shielded cable.A monochrome monitor on the front of the navigation system allows the selected route to be displayed. The radio system speakers back up the display with audio messages in various languages.The supply line for the system control unit is protected by a fuse located in the junction unit under the dashboard.