I wouldn't want to be driving my
MCS on ice or snow with summer tyres - perhaps it's worth a second set of 15's or 16's (or steelies off ebay?) and some winter tyres for all those days and nights the temperatures drop below 6C (that is, when summer tyres are too hard to be of ant real use). Bear in mind that these are mandatory in many parts of Europe, Germany, Switzerland, Sweden, Finland etc.
Instead of tiptoeing around all winter, waiting to spin off or get hit by some other joker, you can still go for a drive! My point is, you're probably wearing boots this time of year, so why not consider the right tyres for the conditions?