2008 Mercedes CL-Class Owner's Manual - Page 189

Control systems COMAND navigation (introduction) When positioning is complete, route guidance is once again possible using navigation announcements and route guidance displays. Interrupting the journey during route guidance The following applies if you interrupt the journey during route guidance and continue the journey later: COMAND resumes route guidance automatically if you continue the journey within 2 hours. Route guidance is canceled if you continue the journey after more than 2 hours. It will be necessary to resume the canceled route guidance manually ( page 240). 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. Deleting message: Switch COMAND off and back on. Input restrictions The input restrictions are imposed starting at a particular vehicle speed. The restrictions are canceled as soon as the speed drops below a certain value. When the restriction is active, certain operations or entries are not possible. You will notice this by the fact that some menu items cannot be selected or certain operations will not be possible. i If you switch the navigation system off/on, it will be operational again until it has to access the faulty area of the hard disk again. The message will then appear again. Consult an authorized Mercedes-Benz Center. 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. Units of measurement The units of measurement in navigation mode are identical to those set in the instrument cluster. 188