2009 Mercedes CL-Class Owner's Manual - Page 102

Control systems COMAND navigation (introduction) software which is compatible with the system software. Route guidance after vehicle transportation COMAND has to redetermine the position of the vehicle if the vehicle has been transported (e. g. by ferry, by train or after towing). Positioning takes place automatically even when COMAND is switched off. The duration varies from one case to another. Route guidance may be restricted as follows during vehicle positioning: RNavigation Interrupting the journey during route guidance The following applies if you interrupt the journey during route guidance and continue the journey later: RCOMAND i Please note that the update must be allowed to run to the end in this case. If you interrupt it, the navigation system will continue to be non-operational. Initial use or use following a system software update In both these cases, the navigation system must determine the position of the vehicle. You may have to drive for a while before precise route guidance is possible. resumes route guidance automatically if you continue the journey within 2 hours. the journey after more than 2 hours. It will be necessary to resume the canceled route guidance manually (Y page 141). RRoute guidance is canceled if you continue announcements, route guidance displays and displayed street names are not consistent with the actual location of the vehicle. does not generate navigation announcements. GPS reception Correct functioning of the navigation system depends on GPS reception, among other things. In certain situations, GPS reception may be impaired, there may be interference or no reception at all, e. g. in tunnels, in multistory parking garages or there is snow covering the trunk lid where the GPS antenna is located. If there is snow on the trunk lid it should be removed. RCOMAND i The journey is interrupted if you park the vehicle and switch off COMAND. The journey is continued when you switch COMAND back on and start driving on. Hard disk errors COMAND has an integrated hard disk on which the map software is saved. If an area of the hard disk has an error, COMAND can no longer access the map data in this area, for example, when calculating a route. The message Navigation Unavailable. Please refer to the operating instructions. appears. RInstead of the route guidance displays, you see the Off Road display and a direction arrow. The direction arrow shows the compass heading to the destination. When positioning is complete, route guidance is once again possible using navigation announcements and route guidance displays. 100