Hello and a warm welcome aboard the good ship saabscene Mrd129.
first off what are the issues you have had with it?
Secondly if have no power , are you getting a warning on the SID about limited performance or the check engine light is showing ?
If any of the above then you require it to be scanned for fault codes with a good quality code reader , I say a good quality one because generic ones may not show any codes present .
.what sort of mileage have you on the car ? Is it manual or automatic?
Once scanned and codes read then put the codes on here .