Why does my Audi A8 make a loud squealing noise when I start the engine?

I recently purchased a used Audi A8 and noticed that whenever I start the engine, there is a loud squealing noise. It lasts for a few seconds and then goes away. Is this something I should be concerned about or is it a normal sound for an Audi A8?

The loud squealing noise could be a result of a loose or damaged serpentine belt. This is a common issue in Audi A8s and can be easily fixed by replacing the belt. I recommend taking your car to a professional mechanic for an inspection.

If the noise only happens when you start the engine, it is likely coming from the starter motor. It can become worn over time and produce a loud squealing noise when starting the engine. I suggest bringing your Audi A8 to a mechanic for a check-up.