Why not do US-Bremerhaven in a container, pick it up at the port and take a nice (albeit partially uninsured) drive to Switzerland? But if you do RORO (your Passat is a beater over here in the land of Aston Martins) anything you put in the car stands a better than 50/50 chance of being stolen.

Another thing you may not have considered is the considerable wait-time for a shipping date.