I just purchased a car from Germany. All import is done. I received also the 13.20 A form.
So, do I have to do another check of the car at cantonal Road Traffic Office? Do you know is I need to have winter tires ( as is January) to get the swiss plates?
Snow tires are not a requirement anywhere in Switzerland. But it is highly recommended by the authorities and the even more knowledgeable EF forums, that you have them fitted.
If you have an accident in the winter on summer tires you are 99% of the time "at fault" as you would be considered to be not properly equipped for prevailing conditions (this is a catch all phrase)
Winter tires are not obligatory in Switzerland, anywhere, it has no bearing on the test providing your summer tires are legal.
Using all seasons no doubt would be less expensive over time. But, in winter, they don’t have the same traction or stopping ability. In summer they don’t grip as well.
All season are fine they are what they are, a compromise between 2 sorts, so neither the best nor the worst option, but there are far better options available, especially if you live above 600m or go skiing a lot.
Probably less than that, considering how hot asphalt can get in the summer(*).
That's quite the point. Tom's Sottoceneri conditions, where fresh snow hardly every survives more than one day even in the very rare cases where it manages to get white in the first place, doesn't really compare to areas with snow all winter long.
And then, some will need to consider regulations abroad. France for instance has mandatory winter tyres IIRC. Austria has the same in case of wintery conditions.
ETA:
(*) To clarify, hot asphalt will wear the all-seasons down faster than the better suited summer tyres.