They were sold in the UK. No idea on mainland europe but I expect they were sold there.
Perhaps one of our German or EU members can chip in.
Switzerland is not as member of the EU so legislation regarding cars moving cross border may well be different.
However I would expect an EU certified/sold vehicle to have little problem with it.
Google importing vehicles into Switzerland would be my first step..
I think importing your own car will be problematic for all
the reasons you have listed and more!
Transport, customs fees and import duties will also likely be a hit.
Insuring a US import will/may also be more expensive.
It will be much easier and cost effective to sell your own vehicle in the US and buy a decent EU/Swiss approved version when you arrive.
The Swiss are very draconian with speed limits etc, fines are huge and directly related to income. It's not a car friendly place if you like going fast..