Automatic Speed Control - Porsche 928 1979 Owner's Manual

1 Set/accelerate
2 Reset
3 Cancel

Automatic Speed Control

The automatic speed control allows you to
maintain a constant cruising speed of 30 mph
(50 km/h) or higher, without actuating the
accelerator pedal.
Any manual operation, such as accelerating,
gearshifting or braking can be done indepen-
dent of the automatic speed control.
The spring loaded control lever operating
the automatic speed control is located just
below the wiper/washer lever.
To operate the automatic speed control
- Accelerate to the desired cruising speed,
push lever toward instrument
(arrow 1) and release. This sets the cruising
speed and stores it in a memory.
- After a second or two automatic speed
control will take over, and you can remove
your foot from the accelerator pedal. The
set cruising speed will be maintained auto-
matically.
- Passing: when you want to drive faster for
a brief moment, for example when passing
another vehicle, actuate the accelerator.
When you take your foot off the acceler-
ator pedal, the preset speed will auto-
matically be resumed.
- Gearshifting: when shifting
automatic speed control is only disengag-
ed as long as the clutch pedal is depress-
e d . The preset speed will be resumed as
soon as you take your foot off the clutch
pedal.
- Braking and stopping: whenever you apply
the brake or come to a stop, the auto-
matic speed control is disengaged. M o v e
the lever down (arrow 2), and the preset
speed will be resumed.
- Switching system off: to switch the auto-
matic speed control off, move the lever
toward you (arrow 3). To resume the preset
speed, move the lever down (arrow 2).
To change the preset cruising speed
Increase preset speed:
- Accelerate by depressing the accelerator
cluster
pedal. When the desired speed is reached,
move the lever up (arrow 1) and take the
foot off the accelerator pedal. N o w
new cruising speed is set and stored in the
memory.
- As an alternative, you can hold the lever
in the up position (arrow 1), without de-
pressing the accelerator pedal. The car
will accelerate on its own. W h e n the de-
sired speed is reached, release the lever.
Decrease preset speed:
- Apply the brake, which will disengage the
automatic speed control. When the vehicle
gears, the
has slowed down to the desired speed,
move the lever up (arrow 1) to set the new
cruising speed.
- As an alternative, disengage the automatic
speed control by moving the lever toward
you (arrow
slowed down to the desired speed, move
the lever up (arrow 1) to register the new
cruising speed in the memory.
Note: when driving up a hill, if the engine
power is insufficient in a particular gear, the
speed control will be disengaged automatic-
ally. Shift to a lower gear to avoid lugging
the engine.
the
3). When the vehicle has
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