What are the most important features to consider when buying an Audi A4?

I am planning on purchasing an Audi A4, but I am not sure which features are most important to consider. Can someone provide guidance on what features I should pay attention to before making my purchase?

When buying an Audi A4, it is important to consider the engine size and type, as well as the transmission and drivetrain options. Also, pay attention to the safety features such as blind spot monitoring and lane departure warning.

In addition to the technical features, it's also important to consider the interior and exterior design, as well as the available technology options such as infotainment systems and driver assistance features.