My B5 S4 was delivered on these and I hated the tram-lining. So first chance I got I changed them to Michelin PS and found those excellent, so I stayed with PSx on that car for about 14 years. When I replaced that car with my B8.5 S5 sportback, I was disappointed but not surprised to see that it had the Pirellis again. However they have not been as bad as I remember them on my S4, only a bit of tramlining which I have tolerated. However nearly 3 years and 12,000 miles later I am starting to feel that they are behaving differently. The tram-lining seems a bit worse and the grip seems a bit less. The wheels have been rotated and there is an average of 3-4mm tread depth. The pressures are spot on - that's something that I check regularly. My S5 has the sports diff and adjustable dampers. Has anyone else experienced that the performance of this brand of tyre degrades noticeably with wear?