[gallery columns="1" size="full" ids="86379"] If you were on the market for a very special RS 6 Avant, we're not sure you could do much better than this one. The long roof you see here was special ordered as Audi exclusive inside and out.  It's painted Porsche Oak Green Metallic (not to be confused with Audi Oak Green Metallic), while on they inside it received Havanna Brown leather with Alabaster White stitching. It's also got a few tasteful modifications, making it the perfect specimen for s...