Why does my Audi A3's engine make a strange noise when I start it?

I have noticed that whenever I start my Audi A3, the engine makes a strange noise. It's not a loud noise, but definitely different from the usual engine sound. What could be the cause of this?

It is normal for some engines to make a slightly different noise when starting up, especially in colder temperatures. However, if the noise is loud or persistent, it could be a sign of a potential mechanical issue. I would recommend taking your car to a certified mechanic to have it checked out.