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154
Driving and Driving Safety
f
Before descending a steep grade, reduce
speed and shift the transmission into a lower
gear to control speed.
f
Do not “ride the brakes” by resting your foot on
the pedal when not intending to apply brake
pressure.
f
Do not hold the pedal down too long or too
often. This could cause the brakes to overheat
and lose braking power.
Brake booster
The brake booster assists braking only when
the engine is running.
When the car is moving while the engine is not
running, or if the brake booster is defective, more
pressure on the brake pedal is required to bring
the car to a stop.
Moisture, road salt or grit on brakes affects
braking.
Brakes will dry after a few cautious brake
applications.
Driving through water may reduce the traction.
Moisture on brakes from road water, car wash, or
a coating of road salt or grit may affect braking
efficiency.
f
Cautiously apply brakes to test and dry the
brakes after exposure to road water, etc.
The brake booster is ready for operation only
while the engine is running.
If the engine is switched off or there is a defect in
the brake booster, much greater force has to be
applied to the pedal when braking.
f
Vehicles with defective brakes must not
be towed and must be transported on a flat
bed.
For information on towing:
f
Please see the chapter “TOWING”
on page 278.
Brake wear
Your car has excellent brakes, but they are still
subject to wear. The rate at which they wear
depends on how the brakes are used.
f
Have the brake system inspected at the
intervals recommended in your Maintenance
Booklet.
Brake system warning light
You can check the functionality of the brake
system warning light by switching the ignition to
the “On” position (position
1
) and verifying that the
warning light illuminates.
A warning message will be displayed on the multi-
purpose display of the instrument panel if the
brake pads are worn, excessively.
f
Do not continue to operate the vehicle.
Have your authorized Porsche dealer inspect
or replace the brake pads.
For information on warning messages on the
multi-purpose display:
f
Please see the chapter “OVERVIEW OF
WARNING AND INFORMATION MESSAGES”
on page 129.
Brake pads and brake disks
Wear on the brake pads and brake disks depends
to a great extent on the driving style and the
conditions of use and therefore cannot be
expressed in actual miles on the road.
The high-performance brake system is designed
for optimal braking effect at all speeds and
temperatures.
Certain speeds, braking forces and ambient
conditions (e.g. temperature and humidity) can
therefore cause the brakes to “squeal”.
Unsuitable or incorrectly installed floor mats or
objects can obstruct the movement of the brake
pedal or prevent application of the brake pedal.
f
Do not obstruct the pedal travel with floor mats
or other objects.
Riding the Brakes
Wet Brakes
WARNING
h
WARNING
h
Loss of Braking Power
WARNING
h
Brake wear warning message USA
Brake wear warning message
Canada
Obstructed Brake Pedal
WARNING
h
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