I have a 2001 A6 2.7T Quattro(stock suspension as far as I know, and stock disc brakes). Bought it with stock wheels wrapped in nearly new snow tires. I am in need of some wheels for summer use, preferably 17s.
Here's my questions…
I know the bolt pattern is 5x112, but what is the offset? I don't want to run spacers if I don't need to.
What other stock/factory wheels will fit? I've seen people running Benz and VW stock wheels, so I was just wondering what other makes will work.

I'm looking to do this as cheap as possible($500 for rims and tires), but I'm not sure that's possible.
Thanks in advance for any input.