How to access the hidden engineering menu on an Audi A5?

I heard there is a hidden engineering menu on the Audi A5 that contains useful diagnostic and performance information. How can I access this menu?

To enter the hidden engineering menu on an Audi A5, first turn on the ignition and then press and hold the CAR and MENU buttons on the MMI control panel. Release the buttons when the hidden menu appears on the screen.

If you have difficulty accessing the hidden engineering menu, try resetting the MMI system by holding down the MENU button for 5 seconds. Then try the button combination again.

Be careful while accessing the hidden engineering menu as it contains some sensitive information and making any changes without proper knowledge can cause damage to your car's systems.