In the same module (5F), look for vehicle_configuration or menu_operation .

button down while simultaneously pressing the center control knob up for 10 seconds. Activation Required:

On systems where the menu is already active, follow these steps: Audi A4 B9 (8W) MMI MHS2 hidden green menu (GEM)

Known internally as the "Green Screen" or "Hidden Menu," the is a powerful, dealer-level diagnostic tool that provides access to system configurations, component activation, and real-time data streams not available through the standard settings.

Displays detailed information about the MMI unit, including hardware versions, software train versions, and loaded FEC (Feature Enablement Code) codes. 2. Green Engineering Menu (GEM)

Here is a breakdown of the most useful and safe sections of the engineering menu for the B9: