I visited the pick-n-pull in Modesto CA earlier today.I had been told there was a 73 SLC but it turned out to be a 450SE sedan instead.It had bosch euro lights intact as of today.I know these are somewhat valuable.I believe they would charge these as "composite" headlight assemblies for about 30$ each.This yard is about 90 miles from my home.If someone REALLY wanted them I could arrange to go back but it is a near 2 hour drive each way.I was very surprised to find them intact.If these had been closer to San Francisco I doubt they'd have lasted 24 hours!
FWIW pick-n-pull now has an online inventory tracker.It will give you info by year and basic model.For the benz you will get 300 series,500 series,etc... but not specific model.You can call the yard directly to get more specific information.As of early January they no longer allow free admission to all yards on a given day.They expect you to to a search either from home or at the gate to see if they have your vehicle in stock.