User manual

General Information
125
English
Limited GPS reception
If there are interruptions or disturbances to GPS reception while driving over
several kilometres, then there may be both functional impairments and inappropri-
ate messages.
There may either be no GPS reception or faulty reception:
 between tall buildings
 in car parks, tunnels or under bridges
 in forests or avenues
 in the event of heavy precipitation and thunderstorms
 in valleys and mountains
 in the event of unfavourable satellite constellations in conjunction with the GPS
antenna installation position. In this case reception may be disrupted over a
longer period of time.
Sufficient GPS reception should be provided for about 95 % of travel time with a
properly installed GPS antenna. Unfavourable positioning of the GPS antenna may
account for more frequent disruptions to reception. In such cases contact the work-
shop responsible for installation.

The navigation system can compensate for GPS reception problems over several
minutes or kilometres without functional impairments.
The Digital Road Map
In order to be able to plan a route to a destination address, the navigation system
not only needs the current position of the vehicle, but also a digital road map on
which the destination address itself and the roads leading to the destination address
are stored. This digital road map is on the map CD which you insert into the naviga-
tion computer.
The road system is stored on the map CD as a line model, i.e. expanded crossings also
have only one focal point that is approached by all roads in point-to-point fashion.
Thus the navigation system indicates the distance to the turn off point as the distance
to the centre of the crossing.
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DE-IT-E_MO_MS5000.book Page 125 Sunday, November 7, 1999 10:57 PM