Saab 900

1994 – 1998

Switch the ignition on Press and hold button A (depends on your dash set up) for 8 seconds The word service will appear in the display; an audible beep will also be heard Switch the ignition off

Saab 9 - 3

1998 – 2002

Switch the ignition on Press and release button A Press and hold button A for 8 seconds The word “service” will appear in the display after 2 audible beeps Switch the ignition off

Saab 9 - 5

1997 – 2002

Switch the ignition on Press and release button A Press and hold button A for 8 seconds The word “service” will appear in the display after 2 audible beeps Switch the ignition off

Info:
Vehicles with long life service intervals (some Audi/Skoda/Seat/VW) cannot be reset using these procedures, only cars (some Audi/Skoda/Seat/VW) with fixed interval servicing can be reset. It’s a VAG thing.
I take No Responsibility over your actions whatever may happen, you reset your service light at your own risk
If your service light wont go out on your first try have a few tries sometimes its hard to do.

Please note where “– “is shown, this means tested up to year 2002

I hope you find these procedures informative and useful.

Disclaimer
Resetting your service light is not a substitute for servicing your vehicle. Obey your manufacturer's suggested service intervals.