Problems with the navigation system

Problem Possible causes/consequences and Solutions Solutions
COMAND is unable to continue route guidance after the journey has been interrupted. Route guidance is canceled if you interrupt the journey for more than two hours.
"Interrupting the journey" refers to stopping the vehicle and switching off COMAND. "Continuing route guidance" refers to switching COMAND back on and driving on.
Continue route guidance.
COMAND determines the vehicle's position. Depending on the driving situation, this may take some time.
Route guidance may be restricted during the determination of the vehicle's location.
When positioning is complete, route guidance is resumed with navigation announcements and route guidance displays.
COMAND is unable to determine the vehicle's position. COMAND has to redetermine the position of the vehicle if the vehicle has been transported (e.g. by ferry, by motorail or after towing).
Start the vehicle and pull away.
COMAND determines the vehicle's position. Depending on the driving situation, this may take some time.
Route guidance may be restricted during the determination of the vehicle's location.
When positioning is complete, route guidance is resumed with navigation announcements and route guidance displays.
The Navigation function unavailable message appears. COMAND has an integrated hard drive on which the digital map is stored.
To protect the hard drive from damage, COMAND switches it off at very high temperatures. The navigation system will then be temporarily unavailable.
Let the vehicle and COMAND cool down.
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.
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 drive once more. The message will then reappear.
Consult an authorized Mercedes-Benz Center.
You see a message informing you that the DVD containing the digital map is incompatible with the system software. The DVD containing the digital map cannot be used for the update.
the COMAND controller. To confirm the message: press the COMAND controller. the COMAND controller.
Eject the DVD.
Center. Have the system software updated at an authorized Mercedes- Benz Center.
The installation of the map software has failed. The DVD is dirty or scratched.
Clean the DVD.
Restart installation.
There is overheating due to excessive temperatures in the vehicle interior.
Wait until the vehicle interior has cooled down.
Restart installation.
COMAND's integral hard drive is faulty.
Consult an authorized Mercedes-Benz Center.
    See also:

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