Hi,
I have gathered a few bits of info.
This is from the Self Study Guide 240 - Technology - Design and Function 240 pages 20 to 24.
What I liked about this picture is the message in the TEXT BOX saying the left and right function of the steering is similar to familiar power steering set up.
Pistons and hydraulics, easy stuff....getting into the power steering unit to replace them and finding the right seals another question!
View attachment 118424
Had a look at
7ZAP to see if the power steering units have hydraulic system o-rings, back up rings and wiper seals listed.
Nothing.
View attachment 118426
You can probably see where this is going....its one of two things I can think of at this point.
Drain all the fluid out the system buy some power steering stop leak and green power steering fluid. Refill the system and hope for the best.
The alternative is to break out the workshop manual and have a look how to remove and replace the rack (you probably have done this already)
But for others who may have the same issues, see diagram below.
I would contact the A2 breakers to see if they have a rack in stock..
Running gear , front wheel drive. Edition 07.2003
View attachment 118427
Hope this is of some use?
EDIT.
Best of luck