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:
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 ...
Accessing and using menus
In menu mode, you can change settings and
program new functions in the audio system.
The various menu alternatives are shown in the
display, and the current level in the menu structure
is show ...
Location of the keyless drive antennas
The keyless drive system has a number of antennas located at various points in
the vehicle.
1 - On the inside center of the rear bumper
2 - Left rear door handle
3 - Center of the parcel shelf, ...
