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:
Integrated two-stage booster cushion
Volvo's optional integrated booster cushions
are located in the outboard seating positions.
These booster cushions have been specially
designed to help safeguard children in the rear
seat. They ...
Power seat
Power seat
1 Front edge of seat cushion up/down
2 Seat forward/rearward and up/down
3 Backrest tilt ...
Auto-brake
If a collision is imminent and the driver has not applied the brakes or begun
to steer around the vehicle or pedestrian, the auto-brake function is activated
without the driver pressing the brake ...
