I have had the MXV4s on two MBs now. First on my 560SEL which I replaced with wider Dunlap SP5000s-good all round tire. Wife's 560SL has them. I just had her car up to 100mph at KY Speedway (1.5 mile oval) last weekend and they performed poorly. Turning with more than a little side load at 85 and they were crying. Not a good feeling at those speeds. Wish I had the time to swap my Dunlaps onto the SL before going to the track. When they were out, they will be replaced with something else.