Removing the coolant hose from the passenger compartment heater
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.
Clamp the hoses with hose clips.
Place some paper under the inner hose connection to collect any spilled coolant.
Turn the quick-release connector (the inner of the 2 hoses) slightly in the direction of the arrow so that the lock opens.
At the same time, pull the coolant hose straight out of the coolant pipe.