2009 Volvo S80 Owner's Manual - Page 111

03 Your driving environment Transmission All Wheel Drive - AWD3 Your Volvo can be equipped with permanent All Wheel Drive, which means that power is distributed automatically between the front and rear wheels. Under normal driving conditions, most of the engine's power is directed to the front wheels. However, if there is any tendency for the front wheels to spin, an electronically controlled coupling distributes power to the wheels that have the best traction. 03 NOTE The message AWD disabled Service required will be appear in the information display if an electrical fault should occur in the AWD system. A warning light will also illuminate in the instrument panel. If this occurs, have the system checked by a trained and qualified Volvo service technician. 3 Standard on certain models. 111