Help!! ....Weird ALIEN noises coming from outside my house

[Helena.B]

 

 

Well  apparently the sound is  is coming out of my 2013 A3

 

Howdy, Audi Folks 

I'm looking for help 

Someone came to view my Audi A3 to buy today, but the engine sound put them off. 😭

I'll take it Monday to see if I can get it diagnosed. 

But just wondering if anybody here would have any idea what this clicking noise is when the engine is revved?  

Or is it normal? 

attached is a video of the engine running 

Thank you 

Helena 

 

Audi A3 1.6 TDI SE Sportback Diesel Manual