Power brakes function only when theengine 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:
Getting Around
The C30 is a fun car to drive. It has a 227-horsepower, turbocharged
five-cylinder engine that makes 236 pounds-feet of torque, which is a lot of
power for such a small car. It's estimated to get ...
Safety
Like all Volvo models, the XC90 features a comprehensive safety package
designed to protect occupants in a wide variety of accidents. Given the higher
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Heated front seats
The current seat temperature is shown in the center console display
Press the button once for the highest heat level – three indicator lights come
on.
Press the button twice for a lower heat l ...
