I just ran into this, and I have a suggestion. As you (apparently) made the model yourself, you should make this another brand than Audi, except ETK. This will allow you to upload the mod to the repo. I’d also make not just the RS version but all other variants of the a6 as well. If you need any help, hit me up on Discord or PMs Milankd
I'm not the author of the 3d model but I project to learn about 3D modeling in the next month. Thanks for your proposition you can also ask me for help in PMs or discord.
If you read the first post carefully, you'll realize the model is sourced from Forza Motorsport 7 (i.e. Turn 10 Studios created the model). Even if the mod is renamed to something fictional, it cannot go on the repository. Read this post made by Nadeox1 on why models from other games are not repository-acceptable: https://beamng.com/threads/audi-rs6-2015.54505/page-3#post-850232
He have Progress tab you see it up there...and u see 90% on 3D model and 0% on others..and he will finish and upload the mod when it is finished and he think it is ready
So are you doing it more thoroughly or are all of the parts named etk800_hood or something on those standards?