You're thinking spin on filters when you *remember* gaskets attached. The MB's use canister filters so that is why you will have to open the "lid". The filters you get for your car should have a large O-ring for the lid, a copper washer for the drain plug and an aluminum washer for the filter stem bolt. It is a somewhat old fashioned way of mounting an oil filter, but is one which works great. The best part is that at some point they mounted the filter in such a way you can change it from above rather than from below as with the 4.5.
Not sure about the filter stand gasket, but is likely the gasket at the interface of the block and filter assembly, not something you'd need to mess with.
'73 280SEL 4.5 (9/72)- RIP
Only 8,173 units built from 5/71 thru 11/72
'02 CLK320 Cabriolet - wifey's mid-life crisis
2012 VW Jetta Sportwagon TDI...at least its a diesel
Non illegitemae carborundum.