Replacing delivery valve seals is not like replacing glow plugs and fuel filters. If you don't have a manual, you're flying blind and your interpretation of verbal instructions from here could lead to more problems. You should have a diagram of how the pieces go together in the delivery valve chamber. There's a spring in there waiting for you to remove the holder so it can throw the innards in every direction. There's also a correct way to put that plunger thing back in the cylinder. Groove up or groove down. I don't remember off the top of my head. There's also a visual check of the needle valve type thing. The procedure is not spelled out in the manual but it makes a lot of sense when you're doing the job. What is not spelled out in the IP section of the manual is the instruction gsxr provided. I don't know if the MB CD contains the section gsxr shared.

Good luck.

Sixto
95 S420
87 300SDL