See also:

Replacing batteries in the headphones
The headphones use two AAA batteries. It is advisable to have extra batteries on hand during long trips. Battery cover and retaining screw 1. Unscrew the retaining screw and remove the batter ...

Climate system maintenance
Special tools and equipment are required to maintain and carry out repairs on the climate system. Work of this type should only be done by a trained and qualified Volvo service technician. ...

Use of Additives
With the exception of gas line antifreeze during winter months, do not add solvents, thickeners, or other store-bought additives to your vehicle's fuel, cooling, or lubricating systems. Overuse ...