See also:

Limitations
Strong sunlight, reflections, extreme light contrasts, the use of sunglasses, or if the driver is not looking straight ahead may make the visual warning signal in the windshield difficult to see. ...

Symbols and messages in the display
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Scanning
SCAN automatically searches through the list of satellite channels. The search will only be carried out in the selected category, see page 214 for more detailed information on the scan function. ...