MMI Hidden Menu

[A8 Doc]

To enable the MMI hidden menu use VAGCOM:

1) Connect to Controller 7 - Interfacebox
2) Goto Adaptation
3) Select Channel 8
4) Change 0 to 1
5) Test and Save
6) Exit

Now you can access the menu by holding Setup + Car.

Be careful selecting boxes you are unsure of, if needed ask here!!

Whatever you do, do not tick START BOOTLOADER.