46
Operating the
navigation system
The operating principle
Entering a destination
You no longer need a street map to
fi nd a specifi c destination. Instead,
you enter your destination in the
navigation system using the text in-
put (see p. 52).
Positioning
The current vehicle position is de-
termined by means of GPS satellite
signals, the speedometer signal and
a gyroscope. The navigation system
compares these data with the dig-
ital map material on the navigation
CD and calculates the vehicle po-
sition as well as the route to the
destination.
For the navigation system to de-
termine the current position, the
vehicle must be on a street which
is featured on the navigation CD
("digitised street") and the GPS an-
tenna must receive suffi cient satel-
lite signals.
Destination guidance
As soon as you start the destination
guidance (see p. 62), you hear voice-
prompted turn-by-turn directions
(see p. 65) and the display shows
visual turn-by-turn directions (ar-
rows, distance and time information,
see p. 64).
Dynamic route adaptation
While driving, the navigation system
can receive traffi c information from
TMC stations in the background
(see p. 33). If there should be a
traffi c jam on the route, you hear
an announcement and the naviga-
tion system automatically calculates
a new route – if it allows you to
reach your destination faster
If you do not follow the turn-by-turn
directions, e.g. because a street is
blocked or because the traffi c rout-
ing has changed, the navigation sys-
tem automatically calculates a new
route (see p. 71).
The corridor function
If the navigation system calculat-
ed a route, it stores all the streets
leading to the destination and also
streets that lie in a corridor to the
left and the right of the route. These
data are illustrates by means of the
corridor status display (see L on
p. 48).
As long as you stay in this corridor,
e.g. while evading a traffi c jam, you
can remove the navigation CD from
the drive and play a CD.
If you leave the corridor while driv-
ing, you hear a request to reinsert
the navigation CD. If you do not in-
sert the navigation CD, you hear a
corresponding note and no addi-
tional turn-by-turn directions fol-
low.
Operating the navigation system
ROMENAV55Eman_star_ois_eng.indd 46ROMENAV55Eman_star_ois_eng.indd 46 06.12.2005 16:04:06 Uhr06.12.2005 16:04:06 Uhr
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