Speedometer with odometer
This instrument shows the speed and the distance travelled.

Fig. 5 Partial view of instrument cluster: odometer
The distance travelled is shown in kilometres (km). On some model versions, the distance travelled is shown in miles.
Lower odometer
The lower odometer shows the total number of kilometres or miles travelled.
Upper odometer (trip odometer)
The upper odometer shows the distance travelled since the trip odometer was last reset. It lets you measure short distances. The last digit indicates hectometres or 1/10 mile. You can reset the upper odometer by pressing the reset button, Fig. 5.
Error message
If there is a fault in the instrument cluster, the letters dEF remain permanently displayed in the trip odometer display. Have the fault rectified at a specialist workshop without delay.
Immobiliser
When you switch the ignition on, the system queries the data of the vehicle key.
If an unauthorised ignition key is used, the message SAFE remains permanently displayed in the odometer display.
It is then impossible to start the vehicle.
Test yourself
A quick Audi A4 quiz: every answer comes with an explanation and a link to the manual page.