Early production A4 B7 S-lines were appalling. But by late production of the A4 B7 S-line they had somehow sorted out the spring and damper rates so the ride was nothing like as bad. This has carried over to the SEAT Exeo, which is basically an A4 B7 with the new engines. I can't tell you what year and month the ride improved on B7 S-lines, so you'll have to judge the ride of the cars you try for yourself.