How do I access the MMI system on my Audi A4?

I recently purchased an Audi A4 and I am having trouble accessing the MMI (Multi Media Interface) system. Can someone please guide me through the steps?

To access the MMI system, first turn on your vehicle and locate the control knob on the center console. Press the control knob and the main menu should appear on your screen. From there, you can navigate through various functions such as media, navigation, and phone.

If you are having trouble accessing the MMI system, try resetting it by holding down the control knob for 10 seconds. If that doesn't work, make sure your car's engine is turned on before you try accessing the system.

Before trying to access the MMI system, make sure you have entered the correct PIN. You can change your PIN by going to the settings menu on the main screen.