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:
Symbols and messages in the display
When City Safety™ automatically applies the brakes, one or more of the symbols
in the main instrument panel may illuminate and its associated message will be displayed.
A text message can be erased ...
Minimum octane
Typical pump octane label
Volvo recommends premium fuel for best performance, but using 87 octane1 or above
will not affect engine reliability.
Volvo engines are designed to achieve rated horsep ...
Removal
Switch off the ignition, remove the remote key
from the ignition slot and wait at least 5 minutes
before disconnecting the battery so that all
information in the vehicle's electrical system
ca ...
