I can confirm that all 3.3 L/Li had the headlight wipers installed as a standard feature, exaclty like the drivers-side power-door-mirror. The only options (which you had to pay for) for those models were:
rear sway bar
the rest was in there - take it or leave it. (velours/suede upholstery and a manual gearbox were no cost options…)
The function is triggered every 5th time when you turn on the low-beam (I think it was, haven‘t driven mine for a long time)
Then there were countries, where national legislation made headlight wipers mandatory from the early/mid 70ies - for all car manufacturers, so there you will find it on all cars sold there in period.