That letter is not at all clear. For example, it says "during that period" without specifying the period this is referring to.
Even more confusing (to me at least) is that then the letter says that cars sold "during that
period" will carry the Registration Year designation of 1964" which would suggest that the car was registered in 1964 even when it was in fact registered in 1963. And what I think Mercedes meant was that they would mimic the US practice of having the 'model year' be earlier than the calendar year. I think even a Chevy that was sold and registered in October 1963 would be 'called' a 1964 Chevy but its registration year would be noted as 1963, not 1964.
Why oh why.
