Did a little more research and found that the gasket (616-141-00-80), item 101, lists for $77 and the asbts descriptor probably is an abbreviation for asbestos.
If the gasket needs to shield the throttle housing from extereme temperatures then the OEM asbestos gasket is the way to go.
I did find it online for $55.20
here.
The link below has the diagram and the key to the item numbers in the diagram.
Mercedes-Benz EPC. OM 616.912 M - Engine, DIESEL ENGINE 48 KW (65 PS/DIN), UP TO END OF MODEL YEAR '80 DIESEL ENGINE 48 KW (65 PS), MODEL YEAR 81 FROM ENGINE 912 10 176207 UP TO ENGINE 236215 AS WELL AS 167207-167211,168491-168500,168525,168525,16852
