What is the most efficient way to reset the MMI system in an Audi A4?

I recently bought an Audi A4 and accidentally messed up the MMI system settings. Now, it's not functioning properly and I want to reset it to its default settings. What is the most efficient way to do this without causing any damage?

The most efficient way to reset the MMI system in an Audi A4 is by using the MMI button on the center console. Press and hold the button until the system restarts and then release it. This should reset the system to its default settings.

Another way to reset the MMI system is by disconnecting the car's battery for a few minutes. This will reset all systems including the MMI. Make sure to have your car manual handy for specific instructions on how to disconnect the battery properly.

If the MMI system is completely frozen, you can perform a hard reset by pressing and holding the MMI button and the center control knob at the same time for about 10 seconds. This should restart the system and reset it to its default settings.