Targa PNA-E3540N User Manual And Service Information page 22

In order to obtain good GPS signal reception the navigation device must be
placed so it has an obstacle-free sight to the sky. Choose a suitable location
on the car's windshield.
Do not install the car mount (with or without the navigation device)
within the operating area of the vehicle's airbag and install the car
mount so that the driver's view is not obstructed.
Navigation Device PNA-E3540N
Car mount
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