Comand unit MERCEDES-BENZ C-Class 2008 W204 Comand Manual

116 Navigation
Introduction

COMAND does not issue any naviga-
tion announcements.

The message “Off Mapped Road” and a
direction arrow are displayed instead
of the route guidance displays. The ar-
row indicates the direction of the desti-
nation.
i Direction arrow accuracy is also dependant
on correct vehicle position and/or direction.
Once the position finding operation has
been completed, route guidance takes
place again via navigation announcements
and route guidance displays.
Interrupting journey during route guid-
ance
i An interruption in the journey means parking
the vehicle and switching off COMAND.
The continuation of the journey means switching
COMAND on again and continuing to drive.
If you interrupt the journey during route
guidance and continue it later, the follow-
ing applies:

If you continue the journey within
2 hours, COMAND automatically con-
tinues route guidance.

If you continue the journey after
2 hours, route guidance is cancelled.
You will have to continue the cancelled
route guidance again manually
(
page 154).
Hard disk drive
COMAND has an integrated hard drive on
which the map software is stored.
If an area of the hard drive has a fault,
COMAND can no longer access the map
data in that area for the route calculation,
for example.
The message “Navigation Unavailable” will
then be displayed.
To delete message: Switch COMAND
off and back on again.
i After switching on/off, the navigation sys-
tem will remain functional until it has to access
the faulty area of the hard drive again. The mes-
sage will be displayed again.
Contact a Mercedes-Benz service center.
Measurement units
The measurement units displayed in navi-
gation mode are identical to those set in
the instrument cluster.There is an input restriction for vehicles for
certain countries.
The restriction is active for vehicle speeds
above apprx. 3 mph. The restriction is de-
activated as soon as the speed falls below
apprx. 2 mph.
Certain entries cannot be made when the
restriction is active, e. g. a city or road en-
try.
This is indicated by the fact that certain
menu items cannot be selected.
Input restriction

213 Technical terminology
AAC
(A
dvanced Audio Coding)
A means of compressing audio data
which is subject to losses. Based on
the MPEG2 standard.
Bit
(Bi
nary digit)
The smallest unit of digital information.
Bit rate
Measurement of transmission speed.
Indicates the number of ->bits trans-
mitted per unit time.
Bluetooth
®
Wireless personal area networks that
provide a way to connect and exchange
information between devices such as
mobile phones, laptops, PCs, etc. over
a short-range radio frequency.
CD
(C
ompact Disc)
Digital storage medium in disc format.
CD-R
(CD
Recordable)
Writeable ->CD-ROM.
CD-RW
(CD
Rewriteable)
CD which can be read, written and de-
leted.CD text
CD text is an extension of an audio CD,
which contains text information such
as title, artist and name of the individu-
al pieces of music.
->COMAND displays
this information on the corresponding
screens if the selected audio CD con-
tains this information.
COMAND control system
(Co
ckpit Management and Data
System)
Central information and operating unit
for various vehicle functions, such as
radio, DVD changer and other equip-
ment, such as telephone, navigation
system.
Dolby Digital
Optional format for audio data on an
DVD audio or DVD video.
DTMF
(D
ual Tone Multi-Frequency)
DTMF tones control answering machi-
nes or other devices, e. g. for remote
queries.
DTS
(D
igital Theater Sound)
Optional format for audio data on an
DVD audio or DVD video.DVD
(D
igital Versatile Disc)
Digital storage medium in disc format
for storing large data volumes, e.g.
films.
DVD+R
(DVD
Recordable)
->DVD which can be read and written
but not deleted.
DVD+RW
(DVD
Rewriteable)
->DVD which can be read, written and
deleted.
DVD-R
(DVD
Recordable)
->DVD which can be read and written
but not deleted.
DVD-RW
(DVD
Rewriteable)
->DVD which can be read, written and
deleted.
Geo-coordinates
Indicate the geographical position of a
location on the earth's surface.