I am guessing the "head" = the valve body? I'm not sure I read it right - is your problem that you couldn't put all the little springs and balls back into place? I know I saw a 722.3 VB diagram on the interwebs somewhere....

edit: this is from w-124.org which is a pretty cool site if you own a w124...unfortunately I don't!

http://www.w-124.info/w124/722.3.pdf

__________________
TC
Current stable:
- 2004 Mazda RALLYWANKEL
- 2007 Saturn sky redline
- 2004 Explorer...under surgery.

Past: 135i, GTI, 300E, 300SD, 300SD, Stealth