M+S might make them legal, but certainly the text written to the tire doesn't change it's behavior.
I have no idea what makes a tyre to be a winter tyre by law in Sweden, but I know that those Michelins are marketed as summer tires in the nordic countries.
The law is pretty vague, defining winter tires as "tires specifically designed for winter". One might think that tires marked M+S fulfills this condition, they do not, they must be specifically designed for winter
and marked M+S. Luckily for us there's a
lazy dog (?) from STRO listing all tires that are approved, and the Latitude Tour is not among them.
If you're driving to Stockholm from the continent you're going via the E4, I doubt you'll be seeing much snow even in "normal winter", the E-roads are priority roads and usually clear of snow if there's a mild winter like it seems to be. On the other hand if it turns into last years (2009/10/2010/11) winter no amount of salt or plowing is going to help, it'll be too cold. Running into the police is also a rather unlikely event. My guess is that you would probably make it to Stockholm without incident, but you could also end up in a ditch, which has a tendency to attract the police, who would then point his finger at your tires, then back at you, then back at the tires, before getting his little notebook out.
Flying is more comfortable than spending hour upon hour on looking at trees. On the other hand if real winter comes, then it'll be less dreary because of all the beautiful snowy trees, and very exciting on summer tires. All that excitement may be tiresome after a while.
I like when there's plenty of snow or no snow. Last year was nice in that aspect.
