hi aerofan,it could be a CV joint or a ball joint.get someone to wiggle the steering whilst the front is off the ground and hold the ball joints and feel for any play.turn the wheels one way and spin the wheels,and listen for a click or clunk from the CVs.
b o luck
I had the same kind of thing on my 9000cse, in the end it turned out to be the steering rack, there was no play in the rack it worked fine, felt fine, I think some had fitted a rebuilt one at some time before I got the car, luckily the garage managed to find me a second hand unit, as new one from saab is just under £500
Thanks for the replies, I have spoken to a recommended Saab Specialist in Sunderland near my workplace and he has suggested that it could be a problem with the bushes on the wishbone system. I have booked the car in for a needed service, so it's getting checked whilst in for the service. I will post back any further comments.
Don't reject the possibility that it's a problem with the universal joint in the steering column (if the 9000 has one). I ended up with a recon rack in my C900 years ago before the problem was correctly diagnosed.