ch.ch has a page on "Entering Switzerland with a motor vehicle", which says:
"Entering Switzerland with a motor vehicle
Moving to Switzerland Vehicles belonging to people moving to Switzerland (that had been used for at least six months abroad) are duty free.
After you have cleared customs, you need to register your vehicle at the road traffic office in your canton of residence, except if you are only bringing it into Switzerland temporarily." https://www.ch.ch/en/importations-cars-switzerland/
For more details, also see this: http://www.ezv.admin.ch/zollinfo_pri...x.html?lang=en