I did the injector seals now about 15 years ago but I forget how to do it. I know there's the spline tool to take the injectors off. I forget what size the replacement O-rings or seals are.
Does anyone have a complete rundown of the steps on how to do the job, and/or a link to a thread with the photos? Changing the seals is not that hard of a job. From memory, you simply take the hard fuel lines off and lift them out of the way.Then you take (?) the upper part of the injector off. You have to make sure you don't lose some little piece that wants to pop up. Take off the O-rings, replace them, then put everything back together again.
1991 300d, 256k
THIS POST NOW EDITED.......... I've since found a great video showing the steps......
https://www.youtube.com/watch?v=PlB0Uc1qdUk
.....and look who wrote a great post on how to do the job!! It was ME!! I forgot I wrote this but found it on the forum here.........
https://www.peachparts.com/Wikka/OM602InjPumpFuelLeak