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:
S80 in the Market
The market for a large luxury sedan from Volvo has always been hampered by
the fact that the people car buyers want to protect most are their family, and
families often opt for wagons and SUVs. Th ...
Anti-lock Brake System (ABS)
The ABS system in your vehicle performs a
self-diagnostic test when the vehicle first reaches
the speed of approximately 12 mph
(20 km/h). The brake pedal will pulsate several
times and a sound ma ...
Rear window and door mirror defrosters
Use the defroster to quickly remove fog and ice
from the rear window and the door mirrors.
Press the button once to start simultaneous
rear window and door mirror defrosting. The
light in the ...