Power brakes function only when theengine 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 in the instrument panel
WARNING
If and
come on at the same time
and the brake level is below the MIN mark
in the reservoir or if a brake system-related
message is shown in the information display: DO NOT DRIVE. ...
Engine compartment, overview
The appearance of the engine compartment
may vary depending on engine model.
1 Coolant expansion tank
2 Power steering fluid reservoir
3 Engine oil dipstick
4 Radiator
5 Filler cap for engine ...
Security
The Volvo S80 is fitted as standard with a wide range of features designed to
protect occupants from burglary, theft and assault. An electronic immobiliser
makes it impossible to start the car wit ...
