I am wondering if all euro headlights were initially configured with the amber turn signal inserts.
Hello Gentlemen,
Very interesting question indeed.
As to my (humble) knowledge, the Euro headlights, or let's better say non-US-rest-of-the-world headlight units always had the amber turn signal inserts...
... but sadly I also do not know more about it.
I try to bring some light into this very interesting question.
Achim
(no SL, only oldparts & knowledge collector)