Audi MMI   MMI control console   Navigation  Other settings
Select: Function selector button NAV > control button Route > Avoid route from here.
When the route guidance is activated, a section of the calculated route that you have set will be avoided. The navigation system will calculate an alternative route.
Using the rotary pushbutton, select the length of the route which is to be avoided.
If you stop and restart the route guidance, it will be necessary to reenter the route section to be avoided.
Note
If the MMI is not able to offer an alternative route, this indicates that no suitable detour is available in the vicinity.