TATA Motors Indigo eCS Owner's Manual & Service Book page 112

MAINTENANCE & CAR CARE
BRAKES (Vacuum Assisted) :
The hydraulic brake system of your car is assisted by a
vacuum booster which reduced the effort of driver during
braking. In the unlikely event of disruption in supply of
vacuum to the booster (e.g. stoppage of engine, or failure
of vacuum hose) this assistance will still be available but
only for one or two brake applications to bring the vehicle
to a stop. Beyond this, vacuum assistance will not be felt
by the driver and brakes will appear to be hard/ineffective.
In order to stop the vehicle effectively the driver will have to
apply a much higher force on the brake pedal (roughly 5
times the normal effort).
CAUTION
Never drive the vehicle in engine switched 'OFF' condition.
Brake Fluid :
Check the level of brake fluid in the brake fluid container. It
should be between the MIN. and MAX. marks.
If not, then add brake fluid. Clean the area surrounding the
cap before opening the cap. Always use fresh brake fluid
and tighten the cap fully, otherwise moisture from the
atmosphere will be absorbed by the brake fluid, making it
unserviceable.
110
In case of spongy or hard pedal or low brake efficiency,
please contact the nearest TATA MOTORS Authorised
Service outlet and get the defect rectified.
BRAKES & BRAKE FLUID