Hitting a cattle grate at 130km/h is no problem for the Audi RS6 Avant. This $225,000 wagon-only may have been engineered as a autobahn-stormer but it is also utterly adept at dealing with Aussie outback bitumen, as our local first drive proved. Audi Australia imported three RS6 Avants two months before the model�??s official on-sale to coincide with the launch of its first local advertising campaign tagged �??land of quattro�??. It shipped them...