This is a good RFT tire. The options are limited, so let me say that I replaced the original set with another at 37000 miles. It was not a particularly difficult decision, really. Tread was beginning to approach the wear bars, but I felt like the grip was diminishing a bit quicker than I was comfortable with. Previous MB diesel SUV (2008 ML) came with Continental Runflats which were total rubbish. Quick wear, poor traction in dry but especially wet. The B-stone Dueler 400's are fine for most conditions. This car does stay parked in heavy snow conditions, though.