I was under the impression the two headlight switch positions to the left of center (the left and right independent marker light functions) were not functional on US models... but I just noticed the other night that on my 300CD (123.153 number 000001) they're functional. Am I wrong or is this an anomaly?

__________________
'82 300CD
"Pearl", the very first turbo diesel 123 coupe
Totaled 11/23/18, rebuild in progress.
'85 300TD, "Artemis".
'78 300D euro, "Ol' Red", mostly retired.
'85 300D, "Gandalf".