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 vehicle recovers kinetic energy during braking in order to reduce fuel
consumption and emissions.
The battery symbol is shown in
the instrument panel when the vehicle is generating power for the battery1.
The function is available in all drive modes together with gear selector position
D or M...
Indicator and warning symbols alert the driver that a function is active, that
a symbol is working, or that an error or serious fault has occurred.
Red symbols
A Canadian models.
B US models.
Amber symbols
Blue symbols
Green symbols
White/gray symbols
..