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:
Loss of a remote key
If either of the remote keys is lost, the other should be taken with the car
to a Volvo retailer. As an anti-theft measure, the code of the lost remote key must
be erased from the system.
NO ...
Tire pressure monitoring light
The tire pressure monitoring
system 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, ...
Water on brake discs and brake pads affects braking
Driving in rain and slush or passing through an
automatic car wash can cause water to collect
on the brake discs and pads. This will cause a
delay in braking effect when the pedal is
depressed ...