Where can I find the VIN number on an Audi A4?

I recently purchased a used Audi A4 and I need to register it, but I can't seem to find the VIN number anywhere. Can someone please tell me where to locate it?

The VIN number on an Audi A4 can typically be found on the driver's side of the dashboard, near the bottom of the windshield. It may also be located on the driver's side door frame or in the owner's manual.

I had the same issue when I bought my Audi A4. I ended up finding the VIN number in the trunk, on the inside of the spare tire cover. It was a bit hidden, so make sure to check there as well.