Audi A4   Controls   Driving  Speed warning function
Detail of the instrument cluster: SET button
Fig. 1 Detail of the instrument cluster: SET button
You can use the SET button to set, alter or cancel speed limit warning 1.
Selecting speed limit
Drive at the desired maximum speed.
Press the SET button in the instrument cluster for one second.
Clearing speed limit
Drive the vehicle at a minimum of 5 km/h.
Press the SET button for at least 2 seconds.
The speed warning lamp lights up briefly in the instrument cluster display to confirm that the selected speed has been stored. The speed limit that has been set remains stored until another speed is set with a brief push of the button, or until the memory is cleared with a long push of the button.
When the speed limit has been cleared, the display will show a crossed-out warning lamp .

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