Think this might answer it.
"Thanks for your query.
Michelin don't manufacture a specific cold weather (winter) tyre in a motorhome fitment, however, the Agilis 2 camping is M+S (mud and snow) marked to give sufficient grip when occasionally travelling in difficult conditions such as unsurfaced roads, mud and snow.
This M+S marking complies with European legislation where in certain countries it is obligatory during certain periods of the year to have cold weather (winter) tyres fitted.
If you need further assurance to tackle the most demanding snow conditions, then carrying snow chains of the correct size can be a good idea"
Will go and check the tires. Always something gets in the way.