With all these P85+ > P85 reports I thought I might add my experience with my own P85 Haven't driven a P85+ but I recently restored my tired old Performance S with 21" Conti's to it's original sure footed self. When I first got my P85 in last days of 2012 (VIN 1919) it was rock solid in road feel and manners. The guy who did my initial inspection said the only car he had driven that was as strong and sure footed was a Rolls Royce Phantom. (haven't driven one of those either, but I took it as a great compliment ) Anyway after a few month and about 5k miles things were not so sure anymore. Changing lanes gave a bit of wobble and any hard acceleration just didn't feel as sure footed and solid as I'd remembered. So anyway a little less than a month ago I got the call to bring my S in for the rear facing seats. (a GREAT HIT BTW!) While there they did a number of TSB warranty operations. One was to inspect and add washers to the rear axle. On the workorder it says "SB-12-31-001 Rear Axle Nut Installation" I also asked them to rotate the tires which they did as well as inflate the tires to 45 PSI. So I don't know for sure if any one particular item did the trick, but the sure footed manners are back! It's held for these three weeks, so I hope its permanent. The point is, that if your S is not as sure footed as you remember or would like it to be you might take it in for service. There is a chance the washer fix or the new lug nut torque spec will fix you up. Probably not quite a P85+, but might put the smile back on your face like it did mine.