How do I check the adaptive cruise control in an Audi A4?

I recently purchased a used Audi A4 and want to make sure the adaptive cruise control is functioning properly. How do I test and verify that it is working correctly?

First, ensure the adaptive cruise control is on by pressing the ACC button on the Audi drive select menu. Then, aim for a clear stretch of road without traffic and set your desired speed. The ACC should automatically adjust your speed if a slower vehicle is detected in front of you.

Take your Audi A4 to a dealership or certified mechanic for a thorough inspection. They will have the necessary equipment to test the adaptive cruise control and make any necessary adjustments.

Perform a manual calibration of the adaptive cruise control. This can be done by accessing the MMI system, selecting the 'Car' menu, then 'Settings,' and finally 'Adaptive Cruise Control' where you can perform a calibration.