How to troubleshoot the start-stop system in an Audi A5?

I recently noticed that the start-stop system in my Audi A5 is not functioning properly. It used to shut off the engine when I come to a complete stop, but now it doesn't. What could be causing this issue and how can I fix it?

Firstly, make sure that the start-stop system is enabled in your car. Some models have a button near the gearshift that allows you to turn it on or off. If that doesn't solve the issue, it could be a problem with the battery or the starter. It's best to take your car to a certified mechanic to diagnose and fix the problem.

I had a similar problem in my Audi A5 and it turned out to be a faulty sensor. The start-stop system relies on several sensors to function properly. If one of them is malfunctioning, it can affect the entire system. I would recommend taking your car to an Audi dealership for a thorough inspection.

In my experience, the start-stop system in Audi cars can be a bit finicky. It's important to keep your car's battery in good condition as a weak battery can cause the system to stop working. You could try replacing the battery and see if that helps.