Why does the Audi A8's adaptive cruise control sometimes have difficulty detecting cars coming from the side?

I've noticed that when using the adaptive cruise control on my Audi A8, it occasionally struggles to pick up vehicles approaching from the side. Is there a specific reason for this?

This is a common issue with radar-based adaptive cruise control systems. They rely on detecting the relative speed and distance of objects in front, so cars coming from the side can sometimes slip through undetected.

To minimize this issue, make sure your adaptive cruise control is properly calibrated and your radar sensors are free from any obstructions or debris. Also, always stay vigilant and be prepared to override the system if needed.