Power brakes function only when theengine 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:
2012 Volvo S60 Review
Before test-driving the 2012 Volvo S60, I considered Volvos to be functional
cars that included cutting-edge safety features. Put another way, I thought
Volvos were dutifully practical family cars ...
Check coolant level
The cooling system must be filled with coolant
and not leak to operate at maximum efficiency.
Check the coolant level regularly. The level
should be between the MAX and MIN marks
on the expansio ...
Ignition switch and steering wheel lock
A The gear selector must be in the P (Park) position (automatic
transmission).
B Please be aware that leaving the key in this position will
increase battery drain. ...