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:
Tire Pressure Monitoring System (TPMS)
The tire pressure monitoring system1 uses sensors
mounted in the tire valves to check inflation
pressure levels. When the vehicle is moving
at a speed of approximately 20 mph
(30 km/h) or faster, ...
Rear window and door mirror defrosters
Use the defroster to quickly remove fog and ice
from the rear window and the door mirrors.
Press the button once to start simultaneous
rear window and door mirror defrosting. The
light in the ...
Chassis
The Volvo XC90 is designed for all types of roads, irrespective of the
surface beneath the tyres or the weather conditions. Even though it was never
designed to be a serious off-roader, the Volvo ...