Power brakes function only when the engine is running
The power brakes utilize vacuum pressure which is only created when the engine is running. Never let the vehicle roll to a stop with the engine switched off.
If the power brakes are not working, considerably higher pressure will be required on the brake pedal to compensate for the lack of power assistance. This can happen for example when towing your vehicle or if the engine is switched off when the vehicle is rolling. The brake pedal feels harder than usual.
See also:
Ignition switch and steering wheel lock
A The gear selector must be in the P (Park) position (automatic
transmission).
B Please be aware that leaving the key in this position will
increase battery drain. ...
Security
Volvo's passion for safety also extends to issues of personal security. The
Volvo XC90 is fitted as standard with a wide range of features designed to
protect occupants from burglary, theft and as ...
Air distribution
The incoming air is distributed from a number
of different vents in the passenger compartment.
Air distribution is fully automatic in AUTO
mode.
If desired, air distribution can be controlled ...