http://www.mbclub.co.uk/forums/showthread.php?t=46543
My (compress Ignite's) Instructions:
R+R Delivery Valve "O" rings(seals)
7h is the rubber "O"ring (We are going to "Viton" rings now to eliminate any
problems with Ultra Low Sulfur Diesel's lack of Lubricity)
BUT, and here is the problem in many replacements:
7i The delivery valve spring is best replaced at the same time.
Along with
7f Which is a "One time Only Use" Copper (crushable) washer used for
sealing the Pressure Valve Holder 7 to the Pressure Valve Carrier 7g.
The other trick is to make sure 7g does not rotate in the process,Nor
should 7k be allowed to rotate in the process.(7k, 7g, and the body
of the Injection Pump have established an almost "Lapped" relationship
to each other by virtue of long standing friction.)
Absolutely Fanatical Adherence to cleanliness standards far surpassing
those in use in a surgical suite will reward the "Do It Yourself"er for
many , many miles.
Also check the FSM for correct tightening torques AND sequence for
your model engine.