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

I recently purchased an Audi A8 and I've noticed that every time I start the engine, there's a strange buzzing noise coming from the front of the car. It lasts for a few seconds and then goes away. Is this something I should be worried about?

The buzzing noise you're hearing is most likely the sound of the fuel pump priming itself as it prepares to deliver fuel to the engine. This is a normal function of the car and nothing to be concerned about.

It's possible that the buzzing noise is coming from a faulty sensor or component, such as a faulty starter. It's worth getting it checked out by a mechanic to make sure everything is functioning properly.

I had this same issue with my Audi A8 and it turned out to be a loose heat shield. It's a common problem with these cars and can easily be fixed by tightening or replacing the heat shield.