Replacing Steering Rack?

[The Henrys]

I have a 1988 5000CD Turbo Quattro Avant and it is leaking Pentosin at a
quarter of a litre per week.  I have replaced the steering pump last summer
(as it was leaking badly).  That seemed to cure the leak for a few months,
now that the weather has turned colder (I live near Toronto)... it has
started to leak from somewhere new!  I have had a mechanic perform some
diagnosis and he believes that it is the rack that is leaking...  I was
wondering if there are any detailed instructions on this procedure.  I check
sjmautotechnik and did not find anything specific.  The Bentley has some
good diagrams, but does not appear to detail all of the preceding steps to
remove other items to get access to the rack.  I would really like to find a
concise list of what needs to be removed and how-to's.

Thanks,
Brent.