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 er ...
Supplemental Restraint System
Supplemental Restraint System (SRS)
SRS warning light
As an enhancement to the three-point seat
belts, your Volvo is equipped with a Supplemental
Restraint System (SRS). Volvo's SRS
consists of ...
Settings
Settings for Lane Departure Warning can be made in the menu system by pressing
My Car. Go to Settings Car settings Driver support systems Lane Departure
WARNING.
There are two alternatives:
...
