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:
Neutral position (N)
No gear is engaged and the engine can be started with the gear selector in this
position. Apply the parking brake if the vehicle is stationary with the gear selector
in position N. ...
Turning ACC off completely
From standby mode, press once.
From active mode, press twice.
The set speed and time interval are then cleared from the system's memory and
cannot be resumed by pressing . ...
Driving dynamics: chassis, steering and brakes
The new Volvo C30 is a compact and light car. Light weight gives a car extra
agility and reduces fuel consumption. 'This light weight was one of the goals
for the Volvo C30,' says Mr Abrahamsson. 'I ...