VDO MS 3000 Owner's Manual page 11

GENERAL
Start-up behaviour
When starting up, the Navigation System may tell you: "You are leaving the
digitized area". It supposes the vehicle in an off-road position. If there are
other roads in this position, the Navigation System may send inappropriate
messages. This means that it supposes the vehicle is on one of the other roads.
When the vehicle has been parked for a long period of time, the navigation
function may be temporarily inhibited. The Navigation System will operate
reliably again once GPS reception is available for a few minutes.
Limited GPS Reception
System performance may adversely affected if GPS reception is interrupted or
interference occurs over a distance of several miles. GPS reception may be
interrupted or interference could occur:
–
In between tall buildings.
–
In multi-storey parking garages, in tunnels and under bridges.
–
In forests or tree-lined avenues.
–
During heavy rain showers and thunderstorms.
–
Unfavourable satellite positions in conjunction with the position of the
installed GPS antenna (in this case GPS reception may be obstructed for a
longer period).
–
In valleys and in mountainous regions.
If the GPS antenna has been properly installed, sufficient GPS reception should
be present about 95 % of the driving time. If interference in the reception
occurs more frequently, improper mounting of the GPS antenna may be the
cause. In this case, we recommend you to contact your VDO Dayton dealer.
However, the Navigation Computer is able to compensate reception problems
over a period of a few minutes without functional interference.
It is recommended that metalized window tinting or any kind of stickers not
be applied in the area surrounding the antenna.
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When the vehicle is parked for a long
period of time, the satellites change their
orbital positions. Therefore, when the
ignition is turned on again it can take a
few minutes before the Navigation System
can pick up enough satellites and evaluate
the received signals.