2011 Mercedes CL-Class Owner's Manual - Page 179

Navigation Problem The Navigation function unavailable message appears. Possible causes/consequences and M Solutions COMAND has an integrated hard disk on which the digital map is stored. To protect the hard disk from damage, COMAND switches it off at very high temperatures. The navigation system will then be temporarily unavailable. X Let the vehicle and COMAND cool down. X To hide the message: switch COMAND off and then on again. If an area of the hard disk has a malfunction, COMAND can no longer access the map data in this area, for example when calculating a route. X To hide the message: switch COMAND off and then on again. The navigation system will be operational again until it has to access the faulty area of the hard disk once more. The message will then reappear. X Consult an authorized Mercedes-Benz Center. Problem Possible causes/consequences and M Solutions 177 You will see a message The DVD containing the digital map cannot be used for the update. informing you that the X To confirm the message: press W the COMAND controller. DVD containing the X Eject the DVD. digital map is incompatible with the X Have the system software updated at an authorized MercedesBenz Center. system software. Problem Installation of the map software has failed. Possible causes/consequences and M Solutions The DVD is dirty or scratched. X Clean the DVD. X Restart the installation. There is overheating due to excessive temperatures in the vehicle interior. X Wait until the vehicle interior has cooled down. X Restart the installation. COMAND's integral hard disk is faulty. X Consult an authorized Mercedes-Benz Center. Z COMAND