Volvo XC90 Owner's Manual page 192

WARNING
If the brake fluid is under the MIN level in
the brake fluid reservoir, do not drive further
before topping up the brake fluid.
The reason for the loss of brake fluid must
be investigated.
Checking and topping up the power
steering fluid
NOTE
Check the level frequently.
Check the level at every service. It is not nec-
essary to change the fluid. The level must lie
between the ADD and FULL marks. See the
capacities and recommended grade on
page 247.
09 Maintenance and service
NOTE
If a fault should arise in the power steering
system or if the car is without power and
must be towed, it can still be steered. How-
ever the steering will be much heavier than
normal and it will require more effort to turn
the wheel.
Oils and fluids
09
191