Confusion is understandable since DBAG has not been consistent in its use of descriptive terminology. During the 1950s and early 1960s these were called "parking lights" in the 300 SL manuals. Come 1964 and 1965, in the 220 SE Coupe and 220 S manuals, they had become "clearance lights." By 1972, in the 280 SE 4.5 manual, they were "standing lights" and were called "standing lamps" in the 1985 380 SL manual, which is the newest M-B that I have. An interesting note regarding these lights in the 1964 220 SE Coupe manual states, "In Germany permitted only in residential districts."
As previously mentioned, the parking/clearance/standing light function was and is fully functional on my cars, including a 1969 Porsche, all of which were constructed for the USA, notwithstanding that I took factory delivery of the 220 SE Coupe in July, 1964.