LIKE the other S models that have come before it, the S6 represents the ultimate vehicle within its model range. It is comprehensively equipped, as one would expect, but we might not have anticipated the inclusion of an integrated telephone and satellite navigation. Performance from the stonking 4.3-litre V8 is, naturally, a strongpoint and handling up to Audi's usual high standards. The interior, both front and rear, is also well appointed and well packaged.