Volvo XC90: Specifications / Transmission fluid specifications
Under normal driving conditions, the transmission fluid will not need to be
changed during the transmission's service life. However, it may need to be changed
if the vehicle is driven frequently in adverse driving conditions.

Engine oil of type VCC RBS0-2AE 0W-20 must be used. Lower oil grades may not
offer the same fuel economy, engine performance or engine protection.
Volvo recommends:
General
See the Service and warranty booklet for information about oil change intervals...
The medium in the hydraulic brake system is called brake fluid and is used
to transfer pressure from e.g. a brake pedal via a master brake cylinder, which
in turn actuates the brake calipers...
Other information:
The media player is controlled from the center display. Several other functions
can also be controlled using the right-side steering wheel keypad or by using voice
commands.
The radio can also be controlled in the media player. See the section describing
the radio...
So that you as a Volvo customer shall have the best possible experience from
your car, Volvo is continuously developing the systems in the cars and the services
that you are offered.
The software in your Volvo will be updated to the latest version when the vehicle
is serviced at an authorized Volvo retailer...