Weird noise on below 0 start up
 

Hi,
I've got a 2007 A4 3.2 M6 with 145000km on it. When I start it for the first time of the day on a freezing temperature morning, it does a wack noise as if something was grinding or something else. Anyone experienced the same thing?

The sound looks nothing good, It's pretty difficult to hear it when I record it with my cellphone, but I've tried as best I could.
Please help me.

Videos: