Is it the hitch from Justin? (Allraodhitch.com) If so, I am sure he states the rating of the car. He already confirmed that the RS6 hitch is identical to the Allroad hitch (and on the Allroad, the rating is 5000/500 in the US; in Europe, they only use up to 200 lb tongue weight AFAIK. So its a function of the car (not the hitch). If 3300 is not enough weight capacity, I am sure the RS6 can handle the same (if not more) than the Allroad. Just tongue weight on stock suspension my not be as high. But 5000 lb with 150-200 lb on the hitch should not be a problem at all, considering the Allroad has the smaller 5HP19 tranny (vs the bigger 5HP24 in the RS6), smaller brakes, weaker engine, etc.