A time ago, I modeled a couple of rims and an audi A6 like the title mentions. I decided to show them out, so here are the results:
Rims:
Audi A6:
As you can see, I only wrapped one rim around a tire and the rest of the rims are subdue to abit of lighting. I also didn't finished the audi completly but I'm happy with the results I got so far and I will not finish the model itself and the texturing because I am planning to start a new project soon