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:
Functions for Internet-connected vehicles and infotainment can be updated
via Download Center. Updates can be done one at a time or all at the same time.
Searching for update
If an update is available, the message New software updates available See
Download Center will be displayed in the center display's status field...
The rain sensor monitors the amount of water on the windshield and automatically
starts the windshield wipers.
When the memory function is activated, the rain sensor button does not need to
be pressed every time the vehicle is started:
Tap Settings in the center display's Top view...