I had to mention it here, for what it's worth, that I have just replaced a set of Michelin Primacy 4 on my A6 C7 Avant 2.0 Ultra, still legal but barely just, after 49,000 miles, mostly motorway miles. Reliable in corners but not earth-shattering, but everything else brilliant down to the last mile. Needless to say, a set of new generation Michelin Primacy 4+ went on to replace them, 225/55R17 97Y.