Number one, know your limitations and memory items cold. It's just memorization and if you struggle with those then the examiner starts digging deeper because you don't know the simple stuff. I've seen it many times.
Number two, know why any light comes on on the overhead, central warning and status panels. Know what happens when you flip any of the switches associated with those lights. More in depth questions may be asked about those systems but often they become a discussion or knowledge sharing experience if you were able to answer the basic question about the light or the switch.
One common area I see missed is a real understanding of the performance chapter in the om11 as it relates to the speeds you should fly. If you bang an engine what speed should you pitch for in climb? What about if you need to turn? Does it change and why? Same for in icing?
You don't need to know everything about the Saab but you need to know what it is trying to tell you and what you need to do in specific situations. The qrh is there for the rest.
Good luck!