Mercedes-Benz 1984 300SD User manual

Owner’s Manual
300 SD-
TURBO DIESEL
- Mercedes-Benz

Drive Sensibly — Save Fuel
Fuel consumption depends to a great
extent on driving habits and operating
conditions
In order to save fuel you should:
• ensure that tire pressures are
correct
• not carry unnecessary loads
• remove ski racks or roof-mounted
luggage racks when not in use
• not warm up your engine at idle
and with the vehicle at standstill
• avoid frequent acceleration and
deceleration
• avoid frequent braking
• avoid unnecessarily high speeds
• have all the maintenance jobs
specified by us carried out at
regular intervals by a
MERCEDES-BENZ service station
Driving in low temperature weather, in
stop-and-go city traffic and on short
hops, and in hilly country as well,
increases fuel consumption

Owner’s Manual
300SD-
TURBO DIESEL
Chassis 126 D
1984
Mercedes-Benz

O u r company and staff wish you many hours of
enjoyment with your new vehicle
You have placed a lot of trust in our company name by
purchasing a MERCEDES, from which you may expect that
it will give you long service, with a minimum of trouble and
that it is easy to operate
We have just one request to make, hoping that it will benefit
you as well:
Please do not put this manual aside without first carefully
reading it
This manual contains many important recommendations
that could help you gain better control over your
MERCEDES and more pleasure while driving it
We wish you many miles of motoring pleasure
Daimler-Benz Aktiengesellschaft
3

Contents
Special equipment is also described
in this manual, including operating
instructions wherever necessary.
Since there are special-order items,
the descriptions and illustrations
herein may vary slightly from the
actuaiequipment of your vehicle.
If there are any equipment details that
are not shown or described in this
Owner s Manual, your MERCEDES-
BENZ dealer will be glad to inform you
of correct care and operating proce
dures.
Vehicle Operation
Instruments and Controls 10
Instrument Cluster 12
Keys, D oo rs 14
Master Key and
Supplementary K ey 14
Flat Key 14
Obtaining Replacement
Keys 14
Opening, Locking and
Unlocking of D oors 14
Central Lock System 15
Burglar Alarm System 16
Seats 17
Front Power Seats 17
Safety Head Restraints 18
Orthopedic Seat Backrest 19
Arm Rest (Front Seats) 20
Arm Rest (Rear Seat) 20
Seat Heater 21
Seat Belts 22
Supplement Restraint
System (SRS) 24
C ontrols 26
Steering Lock 26
Lighting Switch 27
Combination Switch 28
Cruise C ontrol 29
Automatic Climate C ontrol 30
Various Equipment 35
Exterior M irrors 35
Inside Rear View Mirror 35
Sun Visors 36
Sliding R o o f 36
Interior Lam ps 37
Heated Rear Window 37
Lighter 38
Shelf below Rear Window 38
Power Windows 38
Radio 39
The last page
What you should know at the gas
station
5

Contents
Driving
Hood 46
Regular Inspections 47
Parking Brake 48
Starting and Turning
off the Engine 48
Starting and Shifting Gears 50
Safe Driving 52
Brake Pad Wear Indicator
Lamp 54
Brake Fluid 54
Charge Indicator Lam p 54
Fuel Reserve Warning Lamp 54
Oil Pressure Gauge 54
Coolant Temperature Gauge 54
Emission Control 55
Engine Oil Consumption 55
The First 1500 km/1000 Miles 55
Special Operating Conditions 56
Winter Driving 56
Hints for Driving 56
High Altitude Correction
Device 57
Tire Chains 57
Traveling A broad 57
Vehicle Care
MERCEDES-BENZ Maintenance
System
Spare Parts Service
Cleaning and Care of the
Vehicle
Jobs related to C are
Practical Hints
Ash trays 66
60 Rear Seat Cushion 66
61 Bleeding the Fuel System 67
Turning off Engine Manually 67
61 First Aid Kit 68
62 Luggage or Ski Racks 68
Spare Wheel, Jack,
Vehicle Tool Kit 68
Wheels, Tires, Changing Wheels 69
Wheels, T ire s 69
Changing Wheels 70
Tire Inflation Pressure 71
6

Contents
Checking Fuels, Coolants,
Lubricants, etc 72
Engine Oil Level Check 72
Checking Coolant Level 73
Adding C oolant 73
Automatic Transmission
Fluid Level 74
Electrical System 75
Fuses 75
Battery 75
Headlamp Adjustment 76
Replacing Bulbs 76
Emergency Operation of
Sliding R o o f 79
Unlocking the Fuel Filler Flap 79
Windshield Wipers 80
Jump Starting 80
Tow-starting and Towing
the Vehicle 81
Technical Data, Fuels, Coolants,
Lubricants, etc.
Identification Plates 84
Vehicle Data Cards 85
Warranty C overage 85
Technical D ata 86
Fuels, Coolants, Lubricants, etc 88
Capacities 88
Engine Oils 90
Brake Fluid 90
Diesel F uels 91
Coolants 92
Service Literature 93
Consumer Information 94
Vehicle Operation
Driving
Vehicle Care
Practical Hints
Technical Data, Fuels,
Coolants, Lubricants, etc.
7

Vehicle Operation

nstruments and Controls
gj* For more detailed descriptions see quoted pages.
B 1 Speaker grilles
V 2 Side ventilation outlets (page 30)
3 Swivelling outlets for nonheated fresh air (page 30)
4 Parking brake release handle (page 48)
5 Handle to disengage hood lock (page 46)
6 Parking brake pedal (page 48)
7 Combination switch (page 28)
8 Lighting switch (page 27)
9 Cruise control (page 29)
10 Instrument cluster (page 12)
11 Horn control
12 Steering lock with preglow/starter switch (page 26)
13 Lever for nonheated fresh air (page 30)
10
14 Switch for rear passenger compartment
lamp (page 37)
15 Switch for electric sliding roof (page 36)
16 Switch for hazard warning flasher system
17 Switch for automatic antenna (page 44)
18 Switch for heated rear window (page 37)
19 Automatic climate control (page 30)
20 Radio (page 39)
21 Ash tray with lighter (page 38, 66)
22 Switch for left front seat heater (page 21)
23 Loudspeaker — fader control
24 Switch for right front seat heater (page 21)
25 Switch group for power windows (page 38)
26 Adjusting lever for exterior mirror on front
passenger side (page 35)
27 Glove compartment, illuminated (only in steering
lock positions “ 1” or “ 2” )

nstruments and Controls
11

nstrument Cluster
1 Coolant temperature gauge (° C)
Up to red marking: Maximum permissible
temperature for an anti-corrosion/antifreeze-
blended fill protecting down to —30° C/ —22° F
See page 54
2 Fuel gauge with reserve warning lamp (yellow)
Comes on when the steering lock key is moved to
driving position “ 2” and must go out when the
engine is idling See page 54
Fuel reserve and capacity, refer to page 89 and last
page
3 Oil pressure gauge (bar) See page 54
4 Turn signal indicator lamp, left (green)
5 Main odometer
6 Trip odometer
7 Turn signal indicator lamp, right (green)
8 Tachometer
9 Electric clock
10 Knob for clock adjustment
(press in for adjustments)
11 Supplemental restraint system indicator lamp (red)
See page 24
12 Seat belt warning lamp (red)
13 Outside temperature gauge
14 Preglow indicator lamp (yellow)
15 Brake warning lamp (red) comes on if
• the parking brake is engaged
• not enough brake fluid is in the reservoir
16 Brake pad wear indicator lamp (yellow):
Lights up during braking if the front wheel brake
pads are worn down See page 54
17 Charge indicator lamp (red):
Comes on when the steering lock key is moved to
driving position “ 2” and must go out when the
engine is idling See page 54
18 High beam indicator lamp (blue)
19 Knob for instrument lamps and trip odometer
Rotate knob: instrument lamps intensity are infinitely
variable
Depress knob: trip odometer is turned back

nstrument Cluster
13

Keys Doors
Flat Key
The flat key fits all vehicle
locks We recommend that
you carry the flat key with
you and keep it in a safe
place so that it is always
handy, if needed (e g in
your wallet) Never leave the flat key in
the vehicle
Master Key — square head — fits all
locks on the car
Supplementary Key — rounded head
— fits only the door locks and the
steering lock This key is intended to
be used whenever the car is left with
an attendant Be sure to lock glove
compartment and trunk with the
master key
Obtaining Replacement Keys
You are given 4 keys with your
vehicle Replacement keys can be
obtained only via MERCEDES-BENZ
service stations For security rea
sons, obtaining replacement keys
requires considerable time
Opening the Doors
From outside: pull handle outwards (1)
From inside: pull handle in door trim
panel (4)
Locking and Unlocking of Doors
From the outside: turn key
From the inside: actuate button
2 Unlocking
3 Locking
14

Keys Doors
When the rear door buttons are
pushed down, the rear doors cannot
be opened from the outside or the
inside They can be opened after
pulling buttons up
The driver’s door can be locked only if
it is closed and the door lock has
properly engaged
Central Lock System
The central lock system locks or
unlocks the driver’s door, the other
vehicle doors, the fuel tank filler flap
and the trunk lid simultaneously The
lock buttons of the other vehicle
doors must then move together with
the lock button of the driver’s door If
this does not happen, the lock of the
respective door is not properly
engaged Open the door again and
shut it correctly
The front passenger door and the rear
doors can also be locked or unlocked
individually from inside The front
passenger door can also be locked
and unlocked with the key
With the central lock system in the
locked position, the trunk lid can also
be unlocked individually: To do so,
turn the master key to the left as far
as it will go, then depress the trunk lid
lock push button with the key and
open the trunk Turn the key to its
initial position and withdraw it To lock
the trunk lid, close it firmly; the trunk
lid will then be locked by the central
lock system again
The trunk lid can also be locked
independently (for instance, to leave
the vehicle in a workshop) without
actuating the central lock system
Turn the master key to the right as far
as it will go and withdraw it In this
case the trunk lid can only be
unlocked with the master key which
must be inserted and turned back to
the left
Note:
If the fuel tank filler flap cannot be
opened, refer to “ Unlocking the Fuel
Filler Flap” (page 79)
15

Keys Doors
Burglar Alarm System
Switching alarm system on or off:
The alarm system is switched on or
off by locking or unlocking the front
doors with the master key (square
head, marked with a red and project
ing lug which can also be felt at night)
With the warning system switched on
an additional horn will sound intermit
tently for approx 30 seconds if an
unauthorized persons opens a door,
the hood or the trunk lid, turns or
bridges the steering lock (ignition) or
actuates the service brake It keeps
on sounding for approx 30 seconds
even if the triggering component (e g
the door) is closed again immediately
Special functions:
The trunk lid can be opened only
when the alarm system is switched
off
Trunk lid emergency release:
If the trunk lid cannot be opened with
the alarm system switched off, it can
be opened by means of an emer
gency control For this purpose,
remove rear seat cushion and fold
back LH cover Then pull the ring of
the emergency release cable while
another person at the same time
opens the trunk lid
If the vehicle is left in a workshop,
garage etc ,
switch off alarm system Only leave
secondary key (rounded head) with
the vehicle
Notes:
Never hand over master key to
unknown persons We recommend
that you keep the flat key on you in a
safe place (e g in your wallet) so that
it is accessible at any time

Seats
Front Power Seats
The switches for the front seat
adjustment are located in each front
door
Turn ignition key to position “2” to
provide power to the switches
Seat adjustment:
A Seat cushion adjustment
B Seatback adjustment
Storing seat position of driver's seat:
C Memory button
D Position buttons “ 1” and “ 2”
Two seat positions may be stored in
memory After adjusting the driver’s
seat position, press the memory
button C and within 3 seconds, the
position button “ 1” A second seat
position may be stored in memory by
pressing position button "2".
Recalling seat positions stored in
memory:
To recall a seat position stored in
memory, press position button (“ 1”
or “ 2") until seat movement has
stopped For safety reasons, the seat
stops moving immediately after
releasing the position button
Note:
If the ignition key is removed or in
position “ 1” or “ 0” the seats can not
be moved unless the driver's door is
open
Note:
Prior to operating the vehicle, the
driver should adjust the seat height
for proper vision as well as fore/aft
placement and seat back angle to
insure adequate control, reach, oper
ation, and comfort The head restraint
should also be adjusted for proper
height so that when the cushion is
tipped completely forward, it should
form a cradle behind the seat
occupant’s head
Both the inside and outside rearview
mirrors should then be adjusted for
adequate rearward vision Fasten seat
belts Children under the age of six or
under the weight of 23 kg/50 lb
should be seated in the back seat
with an approved restraint system
properly secured
All seat, head restraint and rear view
mirror adjustments as well as fasten
ing of seat belts should only be
accomplished before the vehicle is
put into motion
17

Safety Head Restraints
Adjust head restraint to support the
back of the head approximately at ear
level
Safety head restraints, front
Height adjustment:
Press head restraint slightly forward
(1) and slide upward or downward as
required
Removing head restraints:
Pull head restraint up to the stop
Depress release button (2) to be felt
under the seat back covering material
and pull head restraint up quickly,
holding it by the LH head restraint
post (viewed in driving direction)
Then pull out head restraint com
pletely with both hands
Safety head restraints, rear
Height adjustment:
Raise or lower head restraint as
required
Removing head restraints:
Pull up head restraint until resistance
can be felt Then pull it out quickly
using both hands
Seats
18