Manufacturer press points
These indentations you see are simply manufacuture pressure points. Looks like a zert ought to be fitted there, bu there is no hole for grease to inlet the surface. All of Mercedes ball joints and what would seem like grease points are all sealed. No lubrication is required. if you happen to tear a joint boot please call Phil at Mercedes shop on this post and you can buy the replacement boot if caught shortly after the tear and water and dirt hasn't been introduced to the joint surface.
"Tell me and I will listen, Teach me and I will learn, Show me and I will accomplish, Involve me and I will succeed."
'84 300SD 256,000 Gold on Brown (Mileage Award)
'86 300E 246,000 Blue on Tan