Porsche 928 1979 User Manual
NOTE TO OWNERS
In Canada, this manual is also available in French. Volkswagen Canada Ltd.
To obtain a copy contact your dealer or write to: Porsche Customer Assistance/
NOTE AUX PROPRIETAIRES
1920 Eglinton Ave. East
Assistance a 1a Clientele Porsche
Au Canada on peut se procurer un exemplaire de ce Scarborough
Manuel en francais aupres au conccscionnaire ou du: Ontario M1L 2M2
4683.21 2.2 M 5/78 Model 1979
© Dr. Ing. h. c. F. Porsche Aktiengesellschaft
All rights reserved.
Printed in Germany U.S.-Order-No. W 42-608-174-1
Canada-Order-No. W 42-608-174-101
Your car may have all or some of the components
described in this manual. Should you find explanations of a feature or equipment not installed in your
car, your Porsche dealer will be glad to assist you.
Also check with your dealer on other available op-
tions or equipment.
Text, illustrations and specifications in this manual
are based on the information available at the time
of printing.
It has always been Porsche's policy to continuously
make technical improvements at any time during the
model year and specifications are subject to change
without notice.
Judging by the car you have chosen,
you are a motorist of a special
breed, and you are probably no novice when it comes to automobiles.
Your Owner's Manual contains a
host of useful information. Please
read this manual before you drive
your new Porsche. Acquaint yourself with your car's features and
know how to operate your Porsche
more safely. The better you know
your Porsche, the more pleasure
you will experience driving your
new car.
Always carry your Warranty & Main-
tenance booklet with you when you
take your Porsche to an authorized
dealer for service. It provides your
Service Adviser with the information he needs and enables him to
record each service.
The Owner's Manual and the War-
ranty & Maintenance record belong
with the car. They should be left in
the vehicle when sold, to make all
operating, safety and maintenance
service information available to the
new owner.
For your own protection and longer
service life of your car, please heed
all operating instructions and special cautions. Ignoring them could
result in serious mechanical failure
or even physical injury.
Index
A
Acceleration kick-down 39
Accelerator pedal 39
Adjusting headlights 67
Air compressor 57
Air conditioning 30-32
Air cleaner 55
Alternator warning light 24
Antenna 35
Antifreeze 42, 51, 79
Anti-theft alarm 10
Ashtrays/lights 29, 66
Automatic garage door 41
Automatic speed control 21
Automatic transmission 38, 39
Automatic transmission fluid (ATF) 50
B
Battery 42, 60
Brake - booster 34
- fluid 53
- pads 41
- parking 34, 39
- pedal 34
- system 77
- warning lights 23-25
Brake-in-hints 41
Bulbs - replacing 63-67
Buzzers 9, 14
c
Capacities 78
Cassette radio 35
Catalytic converter 53, 70-72
Cautions 46
Center console 17
Central door locking 11
Central warning light system 25
Changing a wheel 58-59
Chassis number 6
Cigarette lighter 29
Cleaning 44, 45
Clutch 37
Collapsible spare tire 57
Coolant temperature gauge 23
Cooling system 51, 52, 79
Corrosion prevention 42
D
Dashboard 17
Defogging/defrosting 17,26,27,30-32
Dimensions 79
Directional signals 19, 22
Doors locks 9-11, 43
Driving hints 8
E
Electrical system 60-68
Emergency flasher (HAZARD) 29
Emergency service 47
Emergency starting 39, 69
Emergency towing 69
Emission control system 71-73
Engine - compartment 46
- hood release 36
- number 6
- oil 40, 42, 48, 49, 78
- specifications 74-78
F
Fan - radiator 23
Fan switch 31
Filling capacities 78
Flasher - emergency 29
Fog lights 26, 64, 67
Fuel - economy 40
- filler cap 54
- gauge 23
- recommendations 43, 54
- tank 54, 78
Fuse panel 62
Fuses and relays 61
G
Gas station information 84-87
Gasoline - octane ratings 43, 54, 74
Gear ratios 75
Gearshifting 37
Glove boxes 9, 28, 29
H
HAZARD warning light 29
Headlights 63, 67, 68
Headlight dimmer/flasher 19
Headlight washer lever/reservoir .... 20, 51
Headlight switch 19
Heater/ventilation controls 30-32
Highbeam/lowbeam lever/light 19,22
Hood release 36
4
l/i
Identification plates 6
Ignition/steering lock 14
Instrument cluster 12, 18
Instrument illumination 18, 19
Intensive windshield washer/
switch/reservoir 20, 55
Interior lights 11, 60
Intermittent wiper interval 20
Jack 47
Jack lifting points 58, 59
K/L
Keys 9, 10
Kickdown - acceleration 39
Lane changer 19
Lights - ashtrays 66
- fog 26, 64, 67
- interior 11, 65
- license plate 65
- parking 19, 64
- switch 19
- tail 66
- turn signal 22, 64, 65
- vanity mirror 28
- warning/indicator 22-25
Locks 9-14,43
Loudspeaker balance control 34
Luggage compartment 12, 36
M/O
Maintenance 47
Manual transmission 37, 81
Mechanical fan 23
Mirrors 27, 28
Octane ratings 43, 54, 74, 78
Odometer 26
Oil changing/checking 48, 49
- filter 49
- grades 43, 78
- pressure gauge/warning lights . . 24
- transmission 50
P
Paint number 7
Parking brake lever 34
Parking lights/lever 19, 64
Performance 77
Polishing 44, 45
Power antenna 35
Power steering fluid 55
Power windows 10,17
Pressure - tires 56, 76
R
Radiator fan 23, 46, 51
Radio 35
Rear seats 12
Rear window defogger/defroster 26
Rear window wiper switch 26
Rear view mirrors 27
s
Safe driving hints 7, 8
Safety belts 15, 16
Safety belt warning light 29
Seats, front/rear/electric 12, 13
Selector lever 38, 39
Shift points 37
Sliding roof - electric 33
Spare tire - collapsible 57
Specifications - engine 74-77
Speed control - automatic 21
Speedometer 22
Starting hints/engine 14, 40
Steering lock 9, 12-14
Sun visors 28
T
Tachometer 22
Technical data 74-83
Tires 41,42
Tire size/pressure 56, 76
Tool kit 47
Towing 39, 69
Transmission 37-39, 50, 75
Trip odometer 26
Turn signal lights/lever 19, 22, 64, 65
U
Undercoating 42
Unleaded fuel 43, 54, 70
Upholstery, care of 43, 44
V
Vanity mirror 28
Vehicle identification 6
Ventilation/heater controls 30-31
Voltmeter 24
w
Warning/indicator lights 22-25
Washer system 20, 51, 55
Weights 76
Wheels 42, 56, 76
Wheel changing 58, 59
Window switches 11,17
Windshield washer reservoir 51
Windshield/wiper washer lever 20
Winter operation 32, 42, 43
5
Location of Chassis Serial
Number, Paint and Engine Number
When ordering spare parts or submitting
inquiries, always quote chassis and engine
number to ensure correct and prompt service.
Chassis number
In accordance with Federal Safety Regulations, the chassis number of your car is located on the left windshield post and can be
seen from the outside.
6
Engine number
The engine number is stamped on the front The paint number is on the doorjamb on the
reinforcing rib in the top half of the crank- driver's side.
case.
Paint number
Safety Compliance Sticker
Dear Porsche Owner
A lot has gone into the manufacture of your
Porsche, including advanced engineering
techniques, rigid quality control and de-
manding inspections. These engineering and
safety features will be enhanced by you . . .
the safe driver .
who knows his car and all controls,
who maintains his vehicle properly,
who uses his driving skills wisely.
The Safety Compliance Sticker is your assurance that your Porsche complies with all
Federal Motor Vehicle Safety Standards
which were in effect at the time the vehicle
was manufactured. It is located on the doorsill on the driver's side.
The sticker also shows the month and year
of production and the chassis number of your
car (perforations) as well as the Gross
Vehicle Weight Rating and the Gross Axle
Weight Rating.
You will find helpful hints in this manual on
how to perform most of the checks listed on
the following page. If in doubt, have these
checks performed by your Porsche dealer.
7
Before going on a trip . . .
In the drivers seat...
On the highway . ..
1 - Be sure tires are inflated correctly. Look
for bruises and tire wear.
2 - See that wheel bolts or nuts are not
loose or missing.
3 - Check engine oil level, add if neces-
sary. Make it a habit to have engine oil
checked with every second fuel filling.
4 - Check coolant level to assure sufficient
engine cooling.
5 - Be sure you have a well charged bat-
tery. Each cell should be filled to level
with distilled water.
6 - Check brake fluid level. If too low, have
brake system checked.
7 - Replenish windshield washer fluid.
8 - Replace worn or cracked wiper blades.
9 - See that all windows are clear and un-
obstructed.
10-Check whether headlight and tail light
lenses are clean.
11 - Check under car for leaks.
1 2 - Be sure all lights are working and head-
lights are aimed correctly.
1 - Depress plate in center of steering wheel
to check whether horn is working.
2 - Position seat for easy reach of controls.
3 - Adjust inside and outside rear view mir-
rors.
4 - Use safety belts.
5 - Check operation of foot and parking
brakes.
6 - Check all warning und indicator lights
when starting the engine.
7 - DO NOT leave car idling unattended.
8 - Lock doors from inside, especially with
children in the car.
Have the engine oil, the coolant level and the
ATF (in cars with automatic transmission)
checked regularly, even inbetween the re-
commended maintenance intervals.
1 - Always drive defensively. Expect the un-
expected.
2 - Use signals to indicate turns and lane
changes.
3 - Turn on headlights at dusk.
4 - Always keep a safe distance from the car
in front of you, depending on traffic, road
and weather conditions.
5 - Reduce speed during night hours and in-
clement weather.
6 - Observe speed limits and obey highway
signs.
7 - When tired, get off the highway, stop
and take a rest. Turn the engine off. DO
NOT sit in the car with engine idling.
See warning on Engine Exhaust.
8 - When stopped or parked, always set the
parking brake.
9 - When stalled or stopped for repairs,
move the car well off the road. Set the
emergency flasher and use road flares or
other warning devices to warn other motorists.
Turn the engine off before you attempt any
checks or repairs on the car.
Do not invite car theft!
An unlocked car with the key in the ignition
switch invites car theft.
A steering wheel lock and a buzzer alarm
are standard equipment in your Porsche. The
buzzer will sound if you open the driver's
door while the key is still in the ignition lock.
It is your reminder to pull the key out of the
ignition lock and lock the doors.
Do not remove the key from the steering
lock while you are driving or as the car is
rolling to a stop. The steering column is lock-
ed when you remove the key, and you will
not be able to steer the car.
The new format of the master and auxiliary
keys makes unauthorized duplication of the
keys virtually impossible. This means, however, that you yourself will not be able to get
replacement keys cut, unless ordered from
the manufacturer.
Should you need new keys, you must give
the key number. This number is noted on the
plastic tag on the keys. Keep this tag in a
safe place - not in the vehicle.
a Master key
b Auxiliary key
c Rear seat glove box key
Keys
A set of three keys come with your Porsche
(see illustration).
a - master key for ignition lock, door locks,
luggage compartment lock and glove compartment lock
b -auxiliary key for ignition lock, door locks
and luggage compartment lock
c - key for rear seat glove box lock
Key light
The master key has a built-in flashlight in the
key head. The beam from a small bulb in the
key head illuminates the lower part of the key
stem.
The flashlight is on as long as the contact
button is depressed.
The flashlight is powered by a 1.5 Volt button
battery. When the beam begins to fade, re-
place the battery, because an old battery may
leak and damage your clothes.
Black key
illuminated)
Locks
Key functions
Red key
driver and front-seat,
passenger doors
ignition/steering
luggage compartment
fuel cap
glove compartment
Note: A door that has been locked with the black key cannot be opened with the red key, without setting off the alarm. A door that has been locked with the red
key can be opened with either key.
Anti-theft alarm
(optional equipment)
If your Porsche is equipped with an antitheft alarm system, you will be given the two
keys illustrate and described above.
The alarm system is activated when the
driver or front-seat passenger door is locked
with the black key. Opening the driver or
front-seat passenger door by any other
means when the alarm system is activated,
will produce an intermittent high noise for
about 30 seconds.
The same alarm is also triggered when an
attempt is made to open the luggage compartment lid or the engine hood. The engine
cannot be started while the alarm system is
activated.
The alarm system can only be deactivated by
unlocking the driver or front-seat passenger
door with the black key.
The red key can be used to lock and unlock
the doors when activation of the alarm is not
necessary, or when the car is being serviced.
black key only - activate alarm by locking and deactivate alarm by unlocking
red key only - lock and unlock without activating alarm
black key and red key
black key and red key - alarm must be deactivated
red key only
black key only
The fuel cap can only be unlocked with the
red key.
The glove compartment lock can only be unlocked with the black key.
Either key can be used for the luggage com-
partment lock when the alarm is deactivated.
Either key can be used in the ignition/steer-
ing lock.
Keep the plastic tags with the key numbers
in a safe place - NOT IN THE CAR!
10
Central door locking system
The central door locking system operates on
vacuum generated by the engine. A reservoir
allows the locking system to be actuated
about five times after the engine is turned
off. To reactivate the system, operate the
engine for a few seconds. Each individual
door lock can be operated manually when
there is no vacuum in the reservoir.
Always drive with locked doors to prevent
inadvertent opening of a door from the inside, especially with small children in the car.
With the central door locking system, both
driver and passenger doors can be locked or
unlocked simultaneously from the driver's
side. The car is safely locked when button
"A" is fully down on both doors. If button
"A" of one door is not fully down, open that
door again and close door firmly. To lock or
unlock both doors from the outside, use
either the master or auxiliary key on the
driver's side. To lock or unlock both doors
from the inside, turn handwheel "B" on the
driver's side.
Doors
To open doors from outside, pull the recessed door handle.
To open doors from inside, pull the recessed
handle "C" above armrest.
The armrests have a built-in storage com-
partment. To open compartment, press knob
in hand cut-out and tilt armrest outward. To
close, tilt compartment toward door panel.
Power windows - only work with ignition on.
To open or close the windows, depress the
rocker switches in the center console in front
of the shift lever.
Caution: Remove the ignition key to shut off
power to the window switches when the
vehicle is not attended by a responsible
person.
Interior lights
The two interior lights operate independently from each other. The two lights have a
built-in rocker switch which is operated by
tilting the lamp lens. There are three lens
positions:
"a" - light on with front doors or luggage
compartment door open.
"b" - light off.
"c" - light remains on continuously.
11
Front seats
Correct seat positioning is important for safe
and comfortable driving. Therefore, the seat
and the backrest angles in your Porsche are
fully adjustable.
Seat adjustment
To move the seat forward or backward, pull
the locking lever at the front of the seat up.
Now slide the seat to the desired position.
Let the lever go, and move the seat slightly
back and forth to make sure it is securely
engaged.
Do not attempt to adjust the driver's seat
while driving! The seat may suddenly jerk
forward or backward causing loss of control.
Backrest release
The backrest can be folded forward for easy
access to the rear seats. To release, press
the locking button on the side of the backrest (arrow) and, at the same time, tilt the
backrest forward. When the backrest is tilted
back, the lock will engage automatically.
12
Backrest adjustment
Turn handwheel on the outboard side of the
seat (arrows), with your body weight taken
off the seatback.
Front passengers should not ride in a moving
car with the seatback reclined. Safety belts
offer maximum protection only with the seatback in an upright position.
For maximum legroom and unobstructed view
of the instruments, the steering wheel and
the instrument cluster unit can be unlocked
(arrow), adjusted, and then re-locked.
Rear seats - luggage compartment
The backrests of the rear seats can be tilted
forward to provide additional luggage space.
Unsnap the luggage compartment cover from
the upright rear seat backrests and the rear
cross wall.
To release backrest, pull the lever on side
of the backrest up and, at the same time, tilt
the backrest forward.
a backward/forward
b height
c backrest angle
To permit easy access to the rear, the seat
will slide forward automatically when the
backrest in folded down (with ignition on or
off). The seat will remain in a position that
permits comfortable entry to the front, when
the backrest is tilted back to its upright position and securely locked.
Electric seats
(optional equipment)
The rocker switches for a smooth three-way
seat adjustment are located at the outboard
side of the seat.
Manual operation
If the electric mechanism fails, the seat can
be moved forward or backward by pushing
the locking lever under the front of the seat
toward outboard side of seat. Slide the seat
to the desired position and let the lever go.
move the seat slightly back and forth to
make sure it is securely engaged.
13
Ignition/Starter Switch with
Steering Lock
The steering is equipped with an anti-theft
ignition lock.
For your safety, fasten safety belts.
Manual Transmission:
- Move gearshift lever to Neutral.
Automatic transmission:
- Move gearshift lever to Neutral or Park.
Never start or let the engine run in an en-
closed unventilated area. Exhaust fumes from
the engine contain carbon monoxide which
the engine contain carbon monoxide which
is a colorless and odorless gas. Carbon
monoxide can be fatal if inhaled.
There are 4 key positions:
0 - Steering locked. All electric circuits
wired through the ignition switch are
turned off. The ignition key can only be
withdrawn in the "0" position. The parking lights can be operated in this position
by pushing the turn signal indicator lever
up or down (also see "Parking lights").
1 - Steering unlocked. In this position, the
following electric circuits wired through
the ignition are operational: headlights,
windshield wiper, rear window wiper,
windshield/headlight washers, rear window defogger, sunroof, radio and cigarette lighter. The instrument cluster illumination will come on and can only be
turned off with key in position "0".
2 - Ignition on, steering unlocked. All electric
circuits are operational. With the engine
stationary, the central warning light and
all individual warning lights located in
both combination instruments will light
up for a bulb check.
3 - The starter is operated by turning the
ignition key to the right. As soon as the
engine starts, release the key. It will
spring back to position "2". With the
engine running, the central and individual
warning lights should go out. The STOP
LAMP will go out after depressing the
brake pedal and the PARK BRAKE light
after fully releasing the parking brake
(see "central warning light system").
While the engine is cranking, the circuits for headlights and wiper/washer
motor are interrupted.
The starter should not be operated for more
than 10 to 15 seconds at a time. If the engine
does not start the first time or stalls at any
time, the ignition will have to be switched off
and then on again. The non-repeat lock in the
switch prevents the starter from being operat-
ed when the engine is running and thus from
being damaged.
To remove the key and to lock the steering
turn the key back to position "0" and pull it
out. Turn the steering wheel until it locks.
If you leave the key in the ignition/steering
lock, the buzzer will sound when the driver's
door is opened. This is your reminder to
remove the key.
See also Starting Hints and Break-in Period.
The steering column will lock when you re-
move the key. Therefore do not remove the
key while you are driving or as the car is
rolling to a stop.
14
Inertia Real Safety Belt
For your and your passenger's protection,
wear safety belts at all times while the car
is in motion.
Your Porsche is equipped with a safety belt
for each front and rear seat.
The inertia reel safety belt provides safety
with freedom of movement. It adjusts automatically to your size and movements as
long as the pull on the belt is slow. A sudden
motion locks the belt.
Rapid deceleration during hard braking or a
collision locks the belt. The belt will also
lock when you drive up or down a steep hill
or in a sharp curve.
To release a locked belt, lean back to take
the body pressure off the belt.
A shoulder belt should not be worn by a
person less than 4' 7"/1.40 m in height,
or with an erect seating height of less than
2' 5"/ 74 cm, because the belt would not be
in its most protective position and may therefore increase the possibility of injury in a
collision.
For maximum safety and protection, we recommend that small children travel in the
rear seats.
When driving in foreign countries, the wear-
ing of safety belts may be required by law.
Safety belt warning system
An audio-visual warning system is intercon-
nected with the driver's safety belt.
When the ignition is turned on, the warning
light in the center console and the buzzer
will come on for about 6 seconds. The buzzer
will go off as soon as the driver has buckled
up. The warning light will go off after 6 seconds.
Fastening the belt
Sit back in your seat so that your body is
supported by the backrest. Grasp the belt
tongue and pull the belt in a slow continuous
motion across your chest an lap. Insert the
belt tongue into the anchor housing on the
inboard side of the seat. Push down until
securely locked with an audible click.
Be sure the belts are not twisted.
15
Adjusting the belt
For best protection, belts should fit snugly
across lap and chest. If belt has too much
slack, pull shoulder section in direction of
arrow to make sure the belt is drawn snug
around your hips.
Make sure the shoulder belt does not press
against solid or fragile items, such as ball
point pens, pipe, lighter or glasses.
Do not wear the belts loosely.
Do not strap in more than one person with
each belt.
Releasing the belt
To unfasten belt, push the red release button
marked PRESS. Belt tongue will spring out
of anchor housing.
To store lap/shoulder belt, allow belt to wind
up on retractor as you guide belt tongue to
its stowed position on door post. Mark section across your lap with moveable stop to
keep belt tongue from sliding down when
belt is wound up.
The belt of the unoccupied passenger seat
should always be fully wound up, with belt
tongue in stowed position. This reduces the
possibility of the belt tongue becoming a
striking object in case of a sudden stop.
Belt care
Belts that have been subjected to excessive
stretch forces in an accident should be
replaced.
If belts show damage to webbing, bindings,
buckles or retractors, they should be replaced.
If belts do not work properly, see your
authorized dealer to have them repaired or
replaced.
Do not modify or disassemble the safety belts
in your car.
Keep belts clean. If they need cleaning,
use a mild soap solution, but do not remove
belts from car. Do not use other cleaning
agents as they will weaken the webbing.
Never bleach or dye safety belts.
Do not allow safety belts to retract until
they are completely dry. Dry belts in shade.
The seatbelt should not be used to hold a
child's seat as the diagonal belt will not
provide the needed protection.
16
Dashboard panel
and center console
1 Side window defogger/defroster vents
2 Instrument cluster
3 Radio
4 Heating and ventilation controls
5 Center air vents (cooled air only)
6 Reset button for central warning light
7 Glove compartment lock
8 Side view mirror adjuster
9 Front hood release lever
10 Horn
11 Emergency flasher switch (HAZARD)
12 Electric sliding roof switch
13 Power window switch
14 Gearshift lever
15 Safety belt warning light
16 Clock
17 Open storage shelf
17
Instrument cluster
1 Odometer reset switch
2 Light switch
3 Fog light switch
4 Left combination instrument
5 Turn signal indicator light
6 Speedometer
7 Central warning light
8 Tachometer
9 High beam indicator light
10 Right combination instrument
11 Rear window defogger switch
12 Rear window wiper switch
13 Ignition/starter switch with steering lock
14 Instrument illumination control
15 Turn signal/headlight dimmer flasher/
parking light lever
1718 19 20
16 Locking lever for steering column/instru-
ment cluster height adjustment
17 Automatic speed control lever
18 Windshield wiper and windshield/head-
light washer lever
19 Intensive washer system switch
20 Intermittent wiper interval control
18
Lane changer
To indicate your intention when changing
lanes on expressways, slightly lift or depress
the turn signal indicator lever to the resistance point. The lever turns off automatically
when released.
High beam/low beam - with ignition on and
light switch in position 2, push lever forward
to select high beam (arrow 1). The blue indicator light in the instrument cluster comes
on when high beam is switched on.
Pull lever toward steering wheel (arrow 2)
to select low beam.
Light switch - with ignition on
0 - lights off
1 - parking lights on
2 - headlights on and raised
In positions 1 and 2, the following lights are
also on:
- tail lights
- instrument illumination
- shift pattern illumination for automatic
transmission gearshift lever
Instrument illumination control
The brightness of the instrument illumination can be adjusted by turning the thumbwheel on the left side underneath the instru-
ment cluster.
dimmer flasher and parking light
lever - with ignition on
Turn signal/highbeam/lowbeam/
Turn signal indicator
Lever up - right turn signal (arrow 3)
Lever down - left turn signal (arrow 4)
The turn signal lever turns off automatically
when the steering wheel is straightened out
after completing a turn.
If a turn signal bulb becomes defective, the
indicator light flashes at about twice the nor-
mal frequency.
Headlight dimmer flasher - with ignition on
or off
You can signal with your headlights (instead
of horn) by pulling lever toward steering
wheel (arrow 2) to point of resistance and
then releasing it. Repeating this operation
will flash the high beams during daylight and
at night.
Parking lights - with ignition off
Lever up -
right side parking lights on (arrow 3)
Lever down -
left side parking lights on (arrow 4)
19
Windshield wiper and windshield/
headlight washer lever
This lever has six switch positions. The electric wiper system is actuated by pulling the
lever up or down to the following four positions:
0 - wipers turned off
1 - wipers on slow speed
2 - wipers on medium speed
3 - wipers on fast speed
4 - wipers on intermittent speed
The intermittent wiper interval can be adjusted by turning thumbwheel "A" on the
right side underneath the instrument cluster.
20
The electric washer system is actuated by
operating the lever as follows:
5-pull lever toward steering wheel to turn
windshield washer on
Fluid can be sprayed onto the windshield
from any selected wiper speed position.
6 - push lever toward instrument cluster to
turn headlight washer on
The headlight washer system operates only
with the headlights on.
Before operating the wipers, the windshield
must be sufficiently wet to prevent the glass
surface from being scratched. Check wiper
blades frequently and replace at least once a
year.
Intensive windshield washer system
By depressing switch "B" on the right side
underneath the instrument cluster, a supply
of special intensive cleaning solution is
pumped to the windshield. Heavy road dirt,
silicone or insects can be removed quickly
without smearing. The spray duration is controlled by a time relay to avoid excessive
use of the special cleaner. The regular windshield wiper/washer system can then be
operated to finish the cleaning process.
To operate the automatic speed control
To change the preset cruising speed
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 independent of the automatic speed control.
The spring loaded control lever operating
the automatic speed control is located just
below the wiper/washer lever.
- 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 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 accelerator pedal, the preset speed will auto-
matically be resumed.
- Gearshifting: when shifting gears, the
automatic speed control is only disengaged as long as the clutch pedal is depressed. 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 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).
Increase preset speed:
- Accelerate by depressing the accelerator
pedal. When the desired speed is reached,
move the lever up (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 up 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
automatic speed control. When the vehicle
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 3). When the vehicle has
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 automatically. Shift to a lower gear to avoid lugging
the engine.
21
Tachometer
High beam indicator light
The blue light in the instrument cluster will
light up when the selector lever is pushed
forward. The blue light will go out as soon
as low beam is selected.
Turn signal indicator light
The green signal indicator light in the instrument cluster will flash with the selector lever
in either up or down position. If a turn signal
bulb becomes defective, the indicator light
flashes at about twice the normal frequency.
Speedometer
The transistorized tachometer operates on
the pulse count principle and shows engine
speed in revolutions per minute (rpm).
The red mark at the end of the scale indicates the maximum permissible engine rpm.
Before reaching this area, the next higher
gear should be selected. Earlier shifting
saves fuel.
Shift to the next lower gear when the engine
rpm drops below 1500 rpm.
The speed limiting governor prevents the
engine from being overrevved under load.
22
The speedometer indicates driving speed
per hour.
In USA: Miles per hour
In Canada: Kilometers per hour
The upper odometer records total distance
driven and cannot be turned back.
The trip odometer in the lower part of the
instrument can be turned back to zero by
depressing the odometer reset switch on the
lower left side of the instrument cluster.
Central warning light
The central warning light in the instrument
cluster will light up or flash when a fault
occurs in one of the vehicle's systems. (Refer
to "Central warning system").
Combination Instrument
Coolant temperature gauge
Needle in white field - engine is cold
As long as needle is in white field, avoid
high speeds and high engine rpm, until engine has reached normal operating temperature. Do not lug the engine.
Needle in center striped field - normal
Under normal driving conditions, needle
should remain in center field. The needle
may reach the red field, especially at high
engine loads, but should return to "normal"
when engine load is reduced.
Needle in red field - warning
If needle enters the red field, the engine is
overheating. The central warning light will
also come on. Reduce speed and engine
rpm. If the needle does not return to the
center field, and the central warning light
remains on, pull off the road, turn off the
engine and let it cool down.
Coolant temperature
warning light
If this light comes on, the electric fan or the
belt driven mechanical fan may not be working to provide sufficient cooling. Pull off the
road and turn off the engine. If the electric
fan is working, it may still be running for a
while.
WARNING: Wait until engine has cooled
down. The radiator fan switches on automatically when the coolant reaches 92° C
(198° F) and continues running - even with
engine turned off - until the coolant tem-
perature has dropped to 87° C (189°F).
If the electric fan does not work, check for
a blown fuse or contact nearest workshop.
If the mechanical fan is not working, the fan
belt may be loose or broken. The belt should
be re-tensioned or replaced.
Fuel Gauge
With the ignition on, the amount of fuel in
the tank is indicated by the fuel gauge
needle.
Fuel level warning light
This lights comes on when the fuel reserve
level in the tank is down to about 2.9 U.S.
gals, or 11 liters. Time to refuel.
The central warning light and the warning
lights in the combination instrument light up
for a bulb check when the ignition is turned
on. They should go out as soon as the
engine is started. Also see "Central warning
light system".
TAIL LAMP warning light comes on when a
bulb is defective.
STOP LAMP warning light comes on and
goes out after depressing the brake pedal.
If the light stays on a bulb is defective.
WASHER FLUID warning light comes on
when level in the windshield/headlight
washer reservoir is down to 2 U.S. qts. or
2 liters.
PARKING LIGHT indicator comes on when
the parking lights are turned on. The light
will go out as soon as the headlights are
switched on.
COOLANT warning light comes on when
coolant level in the expansion tank falls
below the required minimum (see "Cooling
system" and "Filling capacities").
Trailer turn signal indicator light
Not connected
23
Oil pressure warning light
Oil pressure gauge
Engine oil pressure is shown in kp/cm2. At
5000 rpm, with the engine at normal operat-
ing temperature, the oil pressure should be
about 5 kp/cm2. A slight drop in oil pressure
at higher temperatures is normal.
If the oil pressure should drop suddenly
while you are driving, this light and the central warning light will flash. Pull off the road
and stop the engine immediately. Check the
engine oil level and the ATF level. If both
appear to be normal, contact the nearest
workshop.
Voltmeter
Alternator warning light
The voltmeter shows the overall condition of
the charging system. The needle should
normally stay in the 12-14 volt range when
the engine is running. A temporary drop
below 12 volts when starting the engine is
normal.
The light comes on when the ignition is turned on and goes out as the engine rpm increases. If the light flickers or stays on
while you are driving, the V-belt may be
loose or broken. The belt should be retensioned or replaced. The fault may also be
in the regulator or the alternator itself. In
this case, keep electrical consumption at a
minimum and drive to the nearest workshop.
The central warning light and the warning
lights in the combination instrument light up
for a bulb check when the ignition is turned
on.They should go out as soon as the engine
is started. Also see "Central warning light
system".
BRAKE FLUID warning light flashes when
the brake fluid level falls below the required
minimum.
BRAKE PAD warning light comes on when
a brake pad is worn.
BRAKE PRESS warning light flashes if one
of the circuits in the brake system should
fail.
PARK BRAKE warning light comes on and
stays on until parking brake is fully released.
ENGINE OIL warning light flashes if, with
the ignition on, the engine stationary, and
the vehicle in level position, the amount of
oil in the sump is less than 1.59 U.S. gal. or
6 liters. Do not attempt to start the engine!
Add oil at once!
24
Central warning light system
This electronic warning system monitors the
most important functions of your Porsche
for increased safety and reliability of performance, Should a problem arise, the central warning system will inform you immediately.
The central warning light is located in the
center of the instrument cluster. The individual warning lights are divided between
the two combination instruments.
When the ignition is turned on, the central
warning light and all individual warning lights
will light up for a bulb check. As soon as
the engine is started, the lights should go
out. The STOP LAMP light will go out after
the brake pedal has been depressed. The
PARK BRAKE light will go out as soon as
the parking brake lever is fully released.
Should a problem arise, the central warning
light will light up or flash, together with the
respective individual warning light.
Note: If the engine has been started by towing or pushing, the warning lights will not go
out. The ignition must be turned off and the
engine restarted.
The control function of the central warning
light system is divided into two major
groups:
Group "A" - oil pressure (engine and ATF)
- engine oil level
- brake circuit (pressure) failure
- brake fluid level
Any malfunction reported by the system must
be corrected immediately.
Group "B" - brake wear (pads) indicator
- parking brake
- coolant level
- coolant temperature
- fuel reserve level
- windshield/headlight washer
fluid level
- stop lamps
- tail lamps
Any malfunction reported by the system
should be corrected as soon as possible.
Reset button (white arrow)
By pressing this button, you can turn off the
central warning light for group "B" related
problems. The individual warning light in the
respective combination instrument will remain on as a reminder to have the fault corrected.
The reset button does not apply to group
"A" related problems. Both central and in-
dividual warning lights will continue to flash
because an immediate remedy of the problem is necessary.
25
Rear window defogger/defroster
The rear window defogger/defroster heating
element is actuated by a push button/rotary
switch. The switch is illuminated when the
heating element is energized.
To defog - switch not depressed
0 - heating element off.
1 - heating element on. The heating element
will provide a steady energy output to
keep the rear window free from fog.
Fog lights
With headlights on, the fog lights can be
turned on or off by depressing switch "A".
The switch is illuminated when the fog lights
are on.
Trip odometer
The trip odometer in the lower part of the
speedometer instrument can be turned back
to zero by depressing switch "B".
26
Rear window wiper
To avoid scratching the glass, the rear
window should be sufficiently wet before
turning on the wiper.
To actuate the wiper, operate the one-step
rotary switch on the instrument cluster.
0 - wiper off
1 - wiper on
The wiper action disengages or engages
automatically when the luggage compartment lid is opened or closed.
When cleaning the rear window, the wiper
should be lifted only slightly.
To defrost - switch pressed (arrow)
0 - heating element is fully energized for
defrosting. After about 15 minutes the
heating turns off automatically.
1 - heating element is fully energized for de-
frosting. After about 15 minutes, the
heating element automatically reduces
energy output to "defogging".
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