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:
Service position
Wiper blades in service position
The wiper blades must be in the vertical (service) position for replacement,
washing or to lift them away from the windshield when e.g., removing ice or snow.
T ...
Power steering fluid
Check the level frequently. The fluid does not
require changing. The fluid level must be
between the MIN and MAX marks. For capacities
and recommended fluid grade, see
page 357.
WARNING
If ...
Brake Support
If the risk of collision continues to increase after
the collision warning has been given, Brake
Support is activated. Brake Support prepares
the brake system to react quickly, and the
brakes ...
