Automatic Locking
WARNING: This page does not describe the selected car, but rather 9 other vehicles, including the 2009 Volvo S60, 2008 Volvo S60, 2007 Volvo S60, 2006 Volvo S60, and 2005 Volvo S60. However, it is still accessible from the selected car via links, so may be relevant.
The system has a function which can be activated so that the vehicle is locked automatically when it reaches a speed of 7 km/h (5 mph). The function is normally not activated on delivery from the factory, but can be activated afterwards.