How to fix the Adaptive Cruise Control not working on Audi Q7?

I recently purchased a used Audi Q7 but I've noticed that the Adaptive Cruise Control is not functioning. It has worked before but suddenly stopped working. What could be the issue and how can I fix it?

The first thing to check is if the adaptive cruise control system is enabled in the car's settings. If it is, then the issue could be with the sensors. Make sure they are clean and not obstructed. If the problem persists, it could be a faulty sensor that needs to be replaced.

Another common issue with the adaptive cruise control on Audi Q7 is a faulty brake light switch. You can try replacing it to see if it solves the problem. If not, it could be an issue with the control module which would require professional diagnosis and repair.

In some cases, a weak battery can also cause the adaptive cruise control to malfunction. Make sure to have your battery checked and replaced if necessary. You can also try clearing the car's computer memory by disconnecting the battery for a few minutes.