Why does my Audi A1 make a whining noise when I start the engine?

Recently, I've noticed that my Audi A1 makes a high-pitched whining noise when I start the engine. What could be causing this and is it something I should be concerned about?

The most likely cause for the whining noise is a loose or worn out accessory belt. This should be addressed as soon as possible as it could lead to further damage if left untreated.

Another possibility could be a faulty alternator pulley. In this case, it is best to take your car to a mechanic for a proper diagnosis and replacement if necessary.