Porsche Cayman Owner's Manual page 139

Decelerating
Option 1
f Pull operating lever towards the steering wheel
(position 2) until the desired speed is reached.
The speed reached is maintained and stored
when the lever is released.
Option 2
f Briefly move lever towards the steering wheel
(position 2) (a maximum of 10 times).
The speed is reduced by 1 mph (1.6 km/h),
each time the lever is moved towards the
steering wheel.
Vehicles with Tiptronic S
Additional downshifts are carried out to improve
deceleration (especially when driving downhill).
Interrupting automatic speed control
operation
f Pull operating lever downwards briefly
(position 3) or
f Operate brake or clutch pedal or
f Switch Tiptronic transmission to selector lever
position N.
f Please see the chapter "TIPTRONIC S" on Page
175.
The speed driven before the interruption remains
stored in the memory.
Automatic speed control operation is
interrupted automatically:
– If the set vehicle speed is exceeded by more
than approx. 16 mph (25 km/h) for longer than
20 seconds.
– If the actual vehicle speed falls to approx.
6 mph (10 km/h) below the set vehicle speed
for longer than 5 seconds (upward slopes).
– For PSM control operations.
Resuming the stored speed
f Briefly push operating lever upwards
(position 4).
The speed control accelerates/decelerates
the vehicle to the stored speed.
The stored speed should only be recalled when
traffic conditions and the road surface so permit.
Switching automatic speed control
readiness off
f Press button A on the automatic speed control
lever.
The green readiness light in the speedometer
goes off.
When the vehicle is parked and the ignition
switched off, the memory is cleared.
Important note
On upward or downward slopes, the set speed
cannot always be maintained by the automatic
speed control.
To obtain sufficient engine braking or a better
engine-speed range, therefore, you have to select
a lower gear.
Controls, Instruments
139