Automatic Speed Control - Porsche 928 S 1984 Owner's Manual

1 Set/accelerate 2 Reset

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 ac-
celerator pedal. Any manual operation, such
as accelerating, gearshifting or braking can
be done independent of the automatic speed
control. The spring loaded control lever oper-
ating the automatic speed control is located
just below the wiper/washer lever.
While driving with the automatic speed
control set (at speeds above 30 mph or
50 km/h), do not bring shift lever into the
Neutral position to prevent excessive en-
gine rpm.
36
To operate the automatic speed control
Accelerate to the desired cruising speed, push
lever toward instrument cluster (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 automatically.
Passing: When you want to drive faster for a
brief moment, for example when passing an-
other vehicle, actuate the accelerator. When
you take your foot off the accelerator pedal,
the pressed speed will automatically be re-
sumed.
Gearshifting: When shifting gears, the auto-
matic speed control is only disengaged as long
as the clutch pedal is depressed. The preset
3 Cancel
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 automatic
speed control is disengaged. Move 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 pe-
dal. When the desired speed is reached push
lever toward instrument cluster (arrow 1) and
take the foot off the accelerator pedal. Now
the new cruising speed is set and stored in the
memory.
As an alternative, you can hold the lever in the
front position (arrow 1), without depressing the
accelerator pedal. The car will accelerate on
its own. When the desired speed is reached,
release the lever.
Decrease preset speed:
Apply the brake, which will disengage the au-
tomatic speed control. When the vehicle has
slowed down to the desired speed, push lever
toward instrument cluster (arrow 1) to set the
new cruising speed.
As an alternative, disengage the automatic
speed control by moving the lever toward you
(arrow 3). When the vehicle has slowed down
to the desired speed, push lever toward in-
strument cluster (arrow 1) to register the new
cruising speed in the memory.
Note: When driving up a hill, if the engine pow-
er is insufficient in a particular gear, the speed
control will be disengaged automatically. Shift
to a lower gear to avoid lugging the engine.
WARNING
Do not use the cruise control when it may
be unsafe to keep the car at a constant
speed. For example, a constant speed may
not be safe in heavy traffic, or on winding
or slippery roads. With the cruise control
system engaged, the engine speed will not
return to idle when removing the foot from
the accelerator pedal.
Please observe all local and national speed
limits.