2007 Mercedes S-Class Owner's Manual - Page 147

Control systems COMAND navigation (introduction) 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. Units of measurement The units of measurement in navigation mode are identical to those set in the instrument cluster. 146