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:
Contacting Volvo
In the USA:
Volvo Cars of North America, LLC
Customer Care Center
1 Volvo Drive,
P.O. Box 914
Rockleigh, New Jersey 07647
1-800-458-1552
www.volvocars.us
In Canada:
Volvo Cars of Canada Corp
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Working on your vehicle
Note the following before you begin working
on your vehicle: ...