Good afternoon, I have done plenty of research and without going into too much detail - have now ended up with my 2018 AMG MP with 17' stock alloys fitted with Michelin Agilis 235 x 60 x 17 Agilis Crossclimate.
Though not cheap - for running up and down the continent in rain/snow/towing heavy trailer perfect with masive sidewalls! ( you can fit chains if required )- but I hear pretty good in all snow. please ask if you need more info, but read up on them? I would thoroughly recomend- ive been doing this for some time now - its my recomend! ( the 18' option would not be an issue and for all year round goos MPG and reasonably quiet... always a little compromise somewhere./