If you plan to replace, test, or service your electronic fuel injectors you first must determine which bottom seals you will need. If you have a 1970 or 1973 model, you most likely have the single-bottom seal (unless your engine has been changed). If you have a 1974 or 1975 D-jetronic V8 you will need to remove one of your injectors and confirm what you have before ordering. Watch Kent explain this issue in detail in the YouTube video below.
Product Details
This is how the two seals are installed on the end of the injector. When ordering you will receive eight sets of seals for a V8 engine.
Early model D-jetronic engines only used one rubber seal at the tip.
Related Products:
Late 1974 and 1975 450SL, 450SE and 450SEL New Fuel Injectors Less Bottom Seals
DO NOT ORDER UNTIL YOU REMOVE ONE INJECTOR IN YOUR ENGINE AND INSPECT THE HOLE. Sometime in 1974, Mercedes changed the way these injectors were sealed into the head to prevent air leaks. A "YELLOWISH" nylon sleeve was added along with two seals on the lower end of the fuel injector.
1970 to 1973 3.5 350 D-Jetronic New Replacement Fuel Injector Set with Extras
WARNING: MAKE CERTAIN your current injectors are yellow at the top. A restocking fee will apply if you place an order in error. For the 3.5 engine ONLY. See related products below if you have a 4.5.
1972 to 1973 4.5 450 D-Jetronic New Replacement Fuel Injector Set with Extras
These will also fit the 1972 U.S. version 350SL with the 4.5 engine. Just make sure of the correct color. WARNING: MAKE CERTAIN your current injectors are blue/green at the top. A restocking fee will apply if you place an order in error. These are for the 4.5 engine only.
1970 to 1973 W108 W109 3.5 and 4.5 Fuel Pump Conversion Kit
Since new original style pumps are no longer made, this is the best way to finally fix your old fuel pump leaks and poor performance. This kit is designed specifically for the W108 and W109 small V8 sedans.