User's Manual

122 NAVI
General operation
With its use of visual and acoustic driving
recommendations, the PCM navigation system
allows you to get to your destination quickly,
comfortably, and without problems.
The vehicle position is determined with the aid of
a GPS antenna and a receiver in the navigation
module.
The vehicle position is calculated by evaluating
and processing further vehicle signals
(e.g. speed) in the navigation computer. This
enables the system to automatically correct signal
changes due to wheel changes (altered tire
diameter), temperature, or air pressure variations.
The PCM features a hard drive where the digital
map data is stored.
If an area on this hard drive is damaged or corrupt,
the PCM can no longer access the data in it. An
appropriate message will be displayed.
 The announcement of driving
recommendations is suspended during a
telephone call.
To ensure you make the most effective use of your
PCM navigation system, please observe the
following points:
– GPS reception can be impaired under trees
or between high buildings. No GPS reception
is possible in parking garages, tunnels,
and similar.
– The GPS antenna must not be covered by
metallic or damp objects.
– After the vehicle on-board voltage has been
interrupted (e.g. for changing the vehicle
battery), it can take up to 15 minutes or more
depending on the reception conditions for the
GPS to re-initialize.
– After transporting the vehicle, for example
by ferry, it can take a few minutes depending
on the reception conditions after switching
on until the current GPS position has been
established.
– Without GPS reception, the system calculates
the current position using the vehicle signals
and therefore remains operational in situations
where the reception is temporarily poor.
– After initial start-up of the navigation system,
the fine calibration requires approx. 30 miles.
– High wheel slip (spin on snow) can result in an
incorrect position being given for a short time.
– After a tire change (e.g. summer/winter tires),
fine calibration will only be reached after up to
30 miles.
– Fine calibration must be completed before full
location accuracy is achieved.
WARNING!
Accident hazard. The navigation system
serves only to assist the driver and provide a
suggestion for the route of the journey. This
does not release you from complete
responsibility for your correct conduct in traffic
according to the Road Traffic Regulations or
other relevant regulations. As the driver you
must assess the traffic situation.
û Continue to pay attention to the traffic
situation.
You have sole responsibility for road safety
while driving your vehicle.