2005 SAAB 97x has electical problem. Battery is being drained. Repair guy has no experience with SAAB's, but said the battery is fine. There is an a drain that stops when he disconnects cable leading to fuse box.
You mechanic should know how to do a "key off draw" test. Basically he needs to hook an ammeter in series with one of the battery cables and pull each fuse one at a time and see when the drain goes away. This will show which circuit is causing the problem.
If he doesn't know how to do this I can help you do it yourself. All you need is a test light or a multimeter.
Let me know if you would like me to help you with the testing.