Rubber fuel injector seal fits the models listing in the subtitle above. These should always be changed when replacing fuel injectors. They are also one of the most common sources for intake air leaks causing high idle speed and rough running.
For CIS 280E 280SE 450SL 450SLC 450SEL 1977 to 1980 and 190E 2.3 1984 to 1993
Early CIS 6 and 8 cylinder and 190E 2.3 4 Cylinder Fuel Injector Rubber Seal