Just to followup with you guys. I did get the new parts today. This part number is correct!

Air Fuel sensor gasket
MB# A1121412480
Chrysler# 05159305AA
Cost: $6.85


These were made in France 10/4/04. This is the gasket(officially 'air fuel sensor gasket' according to Chrysler) that goes between the throttle body and the SC. I don't know what MB car it goes on but it's not the C32 or SLK32 apparently.

Now I can put the SSB back together and have a spare, just in case.

MikeR

edit: NOTE that the new gasket has a PART NUMBER on it.