Here share how to diagnose Audi cars via Tuirel S777.
1.Well connect Tuirel S777 to your Audi car, and then turn on Tuirel S777 Diagnostic tool and enter into the main interface.

2.Choose the car model “Audi”.

3.Click “Control Modules”.

4.Next to select “Engine electronics”.

5.Choose “Read Trouble codes”.

6.The result will be shown at screen.

7.You can come back to the last page to choose “Clear Trouble codes” to erase the fault code.

So far, the whole process is done.
Note: You may come back to find the fault code still exist. You can see DTCs erased only after you restart the car

Related link:http://www.eobd2.fr/tuirel-s777-retail-diy-professional-auto-diagnostic-tool-with-full-software.html

How to Diagnose Audi Vehicles via Tuirel S777