I used to like Michelins but have stopped buying them because I found them to be lacking in both traction and wear (life). I don't remember if the MXVs are all weather or not but I recall they might be a "summer tread" which has even poorer traction that the M&S models. You might check the tire inflation though as overinflated tires can cause loss of traction.

Personally I have been pleased with Pirellis lately. I have bought P6 for the summer and snows for the winter and have no complaints so far. I was lucky to get 20K out of the Michelins that came with our MBs which is very poor life IMHO. The Pirellis seem to last much longer.

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Marty D.

2013 C300 4Matic
1984 BMW 733i
2013 Lincoln MKz