Substantial engine knocking: Procedure
WARNING: This page is about a different car, the 2003 Saab 9-3 and 2002 Saab 9-3. However, it is still accessible from the selected car via links, so may be relevant.
It is important that the customer is informed as to which fuel grade is approved for the vehicle and to never use petrol under RON 91 octane. This can be done upon delivery as well as during service visits.