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:
Automatic locking
When the vehicle starts to move, the doors and
tailgate can be locked automatically. This feature
can be turned on or off by pressing MY
CAR and going to Car settings
Lock
settings
Aut ...
Driving on rough/unpaved surfaces
The Volvo XC90 is designed primarily for onroad
driving, and it has excellent handling characteristics
on very rough or unpaved roads.
When driving on poorly maintained or unpaved
roads, please ...
Automatic connection
When the hands-free system is active and the
most recently connected cell phone is within
range, it is connected automatically. If this
phone is not within range, the hands-free system
will at ...
