Saab: 2003 saab 9-3 D.T.E. Display problem

Most likely your d.t.e. display problem is related to a service bulletin which exists. The bulletin says that the MIU (main instrument unit - cluster) needs to be re-added to the car's configuration. Basically it will require a trip to your Saab dealer and they can do this while you wait. If they aren't aware tell them to check IRIS bulletins on this subject.