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:
Improving tire economy
• Maintain correct tire pressure. See the tire
inflation table on page 291.
• Drive smoothly: avoid fast starts, hard
braking and tire screeching.
• Tire wear increases with speed.
• Correct fr ...
Turning off the accessory alarm sensors
In certain situations it may be desirable to turn off the accessory inclination
and movement alarm sensors if, for example, you drive your vehicle onto a ferry
where the rocking of the boat could ...
Environment
Volvo is passionately committed to protecting our environment. Along with
safety, environmental protection is a cornerstone of the Volvo brand,
commensurate with the company's philosophy to protect ...
