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:
Programming HomeLink
NOTE
Some vehicles may require the ignition switch to be turned on or to the second
(“accessories”) position for programming and/or operation of HomeLink. It is also
recommended that a new b ...
Music
Listening to a music CD
1. Insert a CD into the RSE player’s slot with
the disc’s label facing upward.
> The CD will begin to play automatically.
2. Switch on the cordless headphones and
sel ...
Engines
The Volvo XC90 is available with a choice of two high-performance engines -
one diesel and one petrol - both of which produce plenty of power and torque
from low engine speeds and through the mid- ...
