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:
Confirmation when locking/unlocking the vehicle
Settings can be made in the menu system for audible and visual confirmation when
the vehicle has been locked or unlocked. With these functions activated, the following
will occur when the vehicle ...
Warning symbols on the battery
NOTE
A used battery should be disposed of in an environmentally responsible manner.
Consult your Volvo retailer or take the battery to a recycling station.
Handling
Check that the bat ...
Symbols in the main instrument panel
Warning symbols
A Canadian models
Indicator symbols
A Canadian models
Other information symbols
Information symbols in the center console display
Information symbols in the ceili ...
