If it's a company car it can be arranged to import it under the 6mo rule for free.

The company has to provide some evidence that you are connected to it, and that the car was provided to you as part of that connection.

If it's a friend and you had nothing to do with it, I don't think you can do it, so don't try to f* with the authorities because it can get extremely expensive.

I'd suggest you get a cheap car in CH, there's lots around.