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124 Driving and Driving Safety
In heavy rain, while driving through water or after
leaving a car wash, the braking action may be
delayed and incr
eased pressure may be required.
f 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 disks and pads
that significantly reduces friction and therefore
also braking effect.
f Even though the brake disks consist of alloyed
gray 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 disks,
“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 experts at an authorized Porsche
dealer.
f 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:
f Please see the chapter “BRAKE FLUID”
on page 185.
New brake pads or linings
New brake pads have to be “broken in”, and
therefore only attain optimal friction when the car
has covered several hundred miles or km.
The slightly reduced braking ability must be
compensated for by pressing the brake pedal
harder. This applies whenever the brake pads
and/or brake disks are replaced.
A - Switch cruise control on/off
1 - Set/increase desired speed
2 - Reduce desired speed
3 - Interrupt (OFF)
4 - Return to set speed (RESUME)
Cruise Control
Cruise control maintains any selected speed
between approx. 20–150 mph (30–240 km/h)
without you having to use the accelerator.
Cruise control is operated using the control stalk
at the bottom left of the steering wheel.
Wet brakes
Reduced braking
ef
ficiency
WARNING
h
WARNING
h
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