Acoustic warning
WARNING: This page is about a different car, the 2001 Saab 9-3. However, it is still accessible from the selected car via links, so may be relevant.
Acoustic warning if the driver's door is opened while the key is still in the ignition.
Acoustic warning if the parking lights are on and the driver's door is opened while the key is not in the ignition.
The function is programmable.