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 remote key is used to lock and unlock doors, the tailgate and the fuel
filler door. The remote key must be in the vehicle in order to start the engine.
Remote key1, Care Key and button-less key (Key Tag)*.
The remote key is not physically used to start the ignition because the vehicle
is standardequipped with keyless start (Passive Start)...
The media player can play audio from external audio sources connected via
USB port or Bluetooth. It can also play video format via the USB port.
When the vehicle is connected to the Internet, it is also possible to listen
to web radio, audio books and to access music services via apps...