Here is some useful information to answer this question :

• To register your vehicle, you need to have your work / residence permit.
• A poorly maintained car may not pass the technical inspection (in french only) and repairs are expensive in Switzerland. You also need to check if the type and model of your vehicle is valid in Switzerland and meets the relevant standards (in french only).
• You must have owned your car for more than 6 months at the time of your move, otherwise you will have to pay taxes (in french only) when crossing the border.

For general information (in french only) when importing a foreign car into Switzerland