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:
Fuel requirements
Octane rating
Minimum octane
Typical pump octane label
Volvo recommends premium for best performance,
but using 87 octane1 or above will not
affect engine reliability.
Volvo engines are desi ...
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Volvo and the environment
Volvo is committed to the well being of its customers.
As a natural part of this commitment,
we care about the environment in which we all
live. Caring for the environment means an
everyday inv ...
