Cees, let me see if this answers your question. If not we can have another round.
Back in the day (1968), I, an American buyer living in Italy, ordered through a USA dealer a new pagoda for delivery at the factory. Delivery took place in February 1969. The intent was to eventually bring the car back to the USA. Accordingly, the order included US specifications. I don’t know if the USA dealer would have or could have accepted an order for a car without US specifications even if my intent had been to keep it in Europe.
In the early 1970s it became apparent that one could purchase a Mercedes Benz in Europe, often slightly used, and ship it to the US cheaper than buying new through a US dealer. Many people did this. In theory the car had to be converted to US specifications. I think the required conversion only applied to safety features, lights, emission equipment, structural items, etc. These vehicles became known as “Grey Market Cars”. It became a big enough problem for Mercedes-Benz North America that they refused to service these vehicles. This prompted a new non-vendor service industry for high-end European cars.
Who knows how many Pagodas were imported this way. And if some were imported, what modifications were actually required. Some may have slipped through partially modified. The intent of US import rules in those days was that imported vehicle meet the US specifications for the year of manufacture.