First ran a 12.3@114 and then backed it up with this 12.3@115.
This is an original 2003 Audi RS6 with only a custom remap and nothing else!
This run was done on a road that's nearly perfectly flat according to Google Earth. Original 18" wheels and tyres.
Here's the video link to the run along with the VCDS screenshot. Enjoy!
RS6 12.3@115 In-Car Video