Checking water levels
WARNING: This page does not describe the selected car, but rather 8 other vehicles, including the 2006 Volvo S80, 2005 Volvo S80, 2004 Volvo S80, 2003 Volvo S80, and 2002 Volvo S80. However, it is still accessible from the selected car via links, so may be relevant.
Top up with water and coolant as necessary (when the engine is at operating temperature).
Check the level in the servo oil reservoir and top up if necessary.
Raise the vehicle.
Check that there is no oil leakage at the transmission, the dip stick or at the steering gear.