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:
Children should be seated safely
Volvo recommends the proper use of restraint
systems for all occupants including children.
Remember that, regardless of age and size, a
child should always be properly restrained in a
vehicle.
...
RSE menus
IntroductionSettings in the RSE menus can be made
from
the front center console control panel or by
using the remote control in the rear seat. A
source for one of the rear screens can be activ ...
Limitations
In certain situations, DAC may provide warnings
even if the driver’s driving pattern has not
become erratic.
• if the driver is testing the LDW function
• in strong crosswinds
• on grooved road ...
