Driving and Driving Safety
175
Warning!
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Do not obstruct the pedal travel with floor mats
or other objects.
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.
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Vehicles with defective brakes must not
be towed and must be transported on a flat
bed.
For information on towing and tow-starting:
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Please see the chapter “TOWING” on
page 316.
In heavy rain, while driving through water or after
leaving a car wash, the braking action may be
delayed and increased pressure may be required.
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For this reason, keep further back from the
vehicle in front and “dry” the brakes by
applying them at intervals. Make sure that the
traffic behind you is not affected.
After a long drive over salted or gritted roads,
a coating may form on the brake discs and pads
that significantly reduces friction and therefore
also braking effect.
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Even though the brake discs consist of alloyed
grey cast iron, they will unavoidably start to
corrode if your vehicle is parked for an
extended period. The brakes will tend to “rub”
as a result.
The nature, extent and effects of corrosion
depend on the amount of time the vehicle was
parked, whether road salt or grit was spread
and whether grease-dissolving agents were
used in car washes (not on vehicles with
Porsche Ceramic Composite Brake).
To prevent corrosion of the brake discs,
“brake them dry” before parking the vehicle
(not on vehicles with Porsche Ceramic
Composite Brake).
If braking comfort is noticeably impaired, we
recommend that you have the brake system
checked by an authorized Porsche dealer.
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To relieve the brake system on downhill
stretches, change down to a lower gear in
good time (engine braking).
If engine braking is insufficient on steep
stretches, operate the footbrake at intervals.
Avoid continuous braking as it overheats the
brakes and reduces the braking effect.
For information on brake fluid and checking the
brake fluid level:
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Please see the chapter “BRAKE FLUID” on
page 258.
