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.
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 PDK
Downshifts are carried out to improve deceleration (especially when driving downhill).
Interrupting automatic speed control operation
Pull operating lever downwards briefly (position 3) or
Operate brake or clutch pedal or
Switch PDK to selector lever position N.
Please see the chapter "PORSCHE DOPPELKUPPLUNG (PDK)" on page 147.
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. 37 mph (60 km/h) below the set vehicle speed for longer than 60 seconds
– For PSM control operations.
Resuming the stored speed
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
Press button A on the automatic speed control lever.
The green readiness light in the speedometer goes off.
The stored speed value is cleared when the vehicle is parked and the ignition is switched off.
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, you therefore have to change down to a lower gear on vehicles with manual transmission.