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:
Hood and engine compartment
Turn the handle located under the left side of the dash approximately 20-25
degrees clockwise to release the hood lock.
Lift the hood slightly. Press the release control (located under the r ...
Interior
Volvo's largest sedan is categorized as a midsize passenger car, but its
spacious interior makes some other luxury sedans look small by comparison. Even
with a sunroof, headroom is ample for tall ...
Detachable trailer hitch
Overview
A Ball holder
B Locking bolt
C Cotter pin
D Hitch assembly
E Safety wire attachment
Installing the ball holder
1. If necessary, remove the cotter pin from
the locking bolt and slide ...
