Hello,
pleaese look below.

Believe that could be fixed be calibrating the aircon.
Calibration
If the battery has been disconnected or has run flat, the system will
need to be recalibrated.
To start the calibration procedure:
1 Start the engine.
2 Press and simultaneously.
Calibration takes about 30 seconds. During this time and for about
3 seconds after the operation has been completed, the number of
fault codes (if any) stored in the system will appear in the temperature
display on the left. The fault codes themselves will be shown in
the temperature display on the right.
Useful tips
(Before driving the car to an authorized Saab dealer)
• If AUTO is not shown on the display, see ”Cancelling the programmed
settings (I)” on page 73.
• If you suspect that the ACC system is not functioning properly,
cancel (delete) all programmed settings and then recalibrate the
system.
See ”Cancelling the programmed settings (I) and (II)”, pages 73
and 74, and ”Calibration” above.
Note that AUTO will show on the display even if you have completed
Programming II, but that this does not apply to Programming
I.
• If the battery has been disconnected or has run flat, the ACC
system will need to be recalibrated. See ”Calibration” above.

Look at mygmlink.com and register there. Do not worry about the VIN.
Click on the Glovebox section and it is there.

Good Luck,
Radek

This is a design bug in the ducting of the air condition system.

The answer to your question is in my Saab 9-5 FAQ:

Follow this link for the longer answer with more details on how to fix it:

  < http://www.mitt-eget.com/saab/faq_acc.shtml#rear_nozzles >

A Saab dealer should be able to order a manual for your model/year.

You can program it to start up in any state. If you shut the car off for
less than 10 minutes it will start up in the state it was in when shut down,
if the car is shut of for more than ten minutes it will start up in the
programmed default. This is a feature so you can make a short pit stop
without having to change the current settings when you resume your trip.

I would recommend that you try to find a manual, there is quite a bit
of programming that can be done to the ACC and the audio system by
pushing buttons in different combinations. Quite hard to find out
without the manual.

Great stuff ! many thanks ! Feel like a blind man who's sight is restored.
Opened the manual and went straight to the cc section.  ...nevertheless the
following sentence in the manual does not give me great confidence..."Once
the desired climate has been achieved the rear centre vents can be closed to
prevent warm air being distributed at face height" ??? in software
development we call this turning a bug into a feature. Hopefully calibrating
will reduce the air temperature in the back from hot to something mroe
bareable.
Ah well, life isn't suppose to be perfect.

Thanks again for you help, Radek and G?ran