
313 Technical terms
GVWR
(G
ross V
ehicle W
eight R
ating)
This is the maximum permissible vehi-
cle weight. It is indicated on certifica-
tion label located on the driver’s door
pillar.
Instrument cluster
The displays and indicator / warning
lamps in the driver’s field of vision, in-
cluding the tachometer, speedometer,
engine temperature and fuel gauge.
Kickdown
Depressing the accelerator past the
point of resistance shifts the transmis-
sion down to the lowest possible gear.
This very quickly accelerates the vehi-
cle and should not be used for normal
acceleration needs.Line of fall
The direct line that an object moves
downhill when influenced by the force
of gravity alone.
Lock button
Button on the door which indicates
whether the door is locked or un-
locked. Pushing the lock button down
on an individual door from inside will
lock that door.
MCS
(M
odular C
ontrol S
ystem)
Information and operating center for
vehicle sound and communications
systems, including the radio and the ra-
dio and navigation system, as well as
for other optional equipment (CD
changer, telephone, etc.).Memory function*
Used to store three individual seat,
steering wheel and mirror positions.
MON
(M
otor O
ctane N
umber)
The Motor Octane Number for gasoline
as determined by a standardized meth-
od. It is an indication of a gasoline's
ability to resist undesired detonation
(knocking). The average of both the
MON (Motor Octane Number) and
->RON (Research Octane Number) is
posted at the pump, also known as
ANTI-KNOCK INDEX.
Multifunction display
A display field in the instrument cluster
used to present information provided
by the control system.
Parktronic system* (Parking assist)
System which uses visual and acoustic
signals to assist the driver during park-
ing maneuvers.

315 Technical terms
Tele Aid System*
(T
elematic A
larm I
dentification on
D
emand)
The Tele Aid system consists of three
types of response: automatic and man-
ual emergency, roadside assistance
and information. Tele Aid is initially ac-
tivated by completing a subscriber
agreement and placing an acquain-
tance call.
The Tele Aid system is operational pro-
vided that the vehicle’s battery is
charged, properly connected, not dam-
aged and cellular and GPS coverage is
available.
Telematics*
A combination of the terms “telecom-
munications” and “informatics”.
Tightening torque
Force times lever arm (e.g. a lug
wrench) with which threaded fasteners
such as wheel bolts are tightened.Tire speed rating
Part of tire designation; indicates the
speed range for which a tire is ap-
proved.
Traction
Force exerted by the vehicle on the
road via the tires.
Transfer case
Speed of rotation / torque converter
that works together with the ->auto-
matic transmission. In the LOW mode
off-road position, the transfer case de-
creases the output rotational speed of
the ->automatic transmission by ap-
proximately half. This results in a corre-
sponding increase of torque on the
drive axles.
The vehicle then has nearly double the
driving force but drives only approxi-
mately half as fast.TWR
(T
ongue W
eight R
ating)
The TWR is the maximum permissible
weight on the trailer tongue.
VIN
(V
ehicle I
dentification N
umber)
The number set by the manufacturer
and placed on the body to uniquely
identify each vehicle produced.
Voice control system*
Voice control system for car phones,
portable cell phones and audio sys-
tems (radio, CD, etc.).

321 Index
Chart
Fuses 287
CHECK ENGINE malfunction indicator
lamp 248
Checking
Coolant level 215, 222
Oil level 218
Tire inflate pressure 216
Vehicle lighting 216
Checking weights
Trailer and vehicle 208
Checklist
Off-road driving 201
Returning from off-road driving 206
Child safety 67
Airbags 60
Infant and child restraint systems 64,
68
LATCH child seat mounts 72
Child safety switch see Blocking of rear
door window operation 73Cigarette lighter
Front center console 168
Cleaning
Cup holder 238
Gear selector lever 238
Hard plastic trim items 238
Headlamps 131
Headliner 238
Instrument cluster 238
Leather upholstery 239
Light alloy wheels 238
MB Tex upholstery 239
Plastic and rubber parts 239
Seat belts 238
Steering wheel 238
Windows 237
Windshield 50
Wiper blades 237
Clock 26, 118Closing
Glove box 164
Hood 218
Liftgate 92
Rear quarter windows* 147
Side windows 145
Sliding/pop-up roof* 148, 265
Closing sliding/pop-up roof*
In an emergency 265
Cockpit 22, 311
Combination switch
High beam flasher 49, 110
Turn signals 49
Windshield wipers 49
Compass 187
Calibrating 188
Setting compass zone 188
Compass zone 188
Consumer information 308
Control and operation of radio
transmitters 211

337 Index
Sun visor 132
Supplemental Restraint System
(SRS) 314
Switching off
Automatic climate control 137
ESP 81
Hazard warning flasher 112
Headlamps 54
Rapid seat heating 99
Transmission control – LOW RANGE
mode 125
Switching on
Automatic climate control 137
ESP 82
Front fog lamps 111
Front fog lamps, rear fog lamp 111
Hazard warning flasher 112
Headlamps 48
High beams 110
Rapid seat heating* 98
Seat heating* 98
Transmission control – LOW RANGE
mode 125
Trip computer* 186
Windshield wipers 49Synchronizing
ESP 246
Power windows 146
Remote control 263
Sliding/pop-up roof* 149
T
Tachometer 26, 118
Displaying gear range 121
Tail lamps 270
Cleaning 236
Replacing bulbs 267Tar stains 235
Technical data 302
Brake fluid 302
Coolants 304
Electrical system 297
Engine 294
Engine oil 302
Engine oil additives 302
Fuel requirements 303
Gasoline additives 303
Main dimensions 298
Premium unleaded gasoline 303
Rims and tires 295
Weights 299
Windshield and headlamp washer
system 307
Tele Aid System* 315

339 Index
Traction 308, 315
Trailer
Attaching 208
Loading 208
Towing 209
Trailer hitches 207
Trailer towing 206
Attaching a trailer 208
Checking weights 208
Electrical connections 207
Hitches 207
Loading 208
Weights and ratings 207
Trailer weights and ratings 207
Transfer case 315
Transmission control – LOW RANGE
mode 125
Switching off 125
Switching on 125
Transmission selector lever 264
Unlocking manually 264
Tread depth (tires) 230
Treadwear 308Trip computer* 29, 186
Average fuel consumption 189
Compass 187
Country 190
Distance remaining 189
Language 190
Selecting functions 186
Setting date 186
Stop watch 189
Switching on 186
Trip odometer
Resetting 118
Trip odometer display 117
Trunk see Cargo compartment 89
Turn signal lamps
Replacing bulbs 266, 267, 269
Turn signals 49
Additional in mirrors 266
Cleaning lenses 236
Front bulbs 266
Indicator lamps 25
Rear bulbs 267, 270
Turning off
Engine 54U
Unlocking 32, 88
Centrally from inside 94
Driver’s door in an emergency 261
Driver’s door, fuel filler flap 89
Fuel filler flap 214
In an emergency 261
Transmission selector lever
manually 264
Vehicle in an emergency 179
With the remote control 32
Upgrade signals
Tele Aid* 178
Uphill driving
Cruise control 151
Upholstery
Cleaning 239
Upshifting 120

340 IndexUseful features 164
Ashtrays and cigarette lighter 168
Cup holder 166
Electrical outlet 170
Garage door opener 180
Interior storage spaces 164
Programming or reprogramming the in-
tegrated remote control 182
Tele Aid* 171
Telephone* 170
Trip computer* 186
V
Vehicle
Locking 28
Locking in an emergency 262
Lowering 276
Proper use of 17
Service battery 278
Towing 283
Unlocking 28
Unlocking in an emergency 261
Vehicle and trailer weights and
ratings 207
Vehicle battery 278Vehicle care
Cup holder 238
Engine cleaning 236
Gear selector lever 238
Hard plastic trim items 238
Headlamps 236
Instrument cluster 238
Leather upholstery 239
Light alloy wheels 238
MB Tex upholstery 239
Ornamental moldings 236
Paintwork 235
Parktronic* system sensor 237
Plastic and rubber parts 239
Power washer 235
Seat belts 238
Steering wheel 238
Tail lamps 236
Tar stains 235
Turn signals 236
Upholstery 239
Vehicle washing 236
Window cleaning 237
Wiper blades 237Vehicle identification number (VIN) 292
Vehicle jack 258
Vehicle lighting
Checking 216
Vehicle tool kit 257
Vehicle with CD-changer* 258
Vehicle washing 236
VIN (Vehicle Identification Number) 292,
315
Voice control system* 315
W
Warning indicators
Parktronic* 155
Warning sounds
Drivers seat belts 64
Parking brake 48
Warranty coverage 291
Washer fluid see Windshield washer fluid
Washing the vehicle 234

341 Index
Wear pattern (tires) 228
Weights 299
Wheel bolt wrench 258
Wheel change
Tightening torque 277
Wheels
Rotating 228
Window curtain airbags 64
Windows see Side windows
Windshield
Defogging 138
Refilling washer fluid 224
Replacing wiper blades 273
Washer fluid 224, 307
Washer system 307
Windshield washer fluid 307
Filler neck 224
Mixing ratio 307
Refilling 224
Wiping with 50Windshield washer system 307
Windshield wipers 49, 129
Intermittent 49
Interval wiping 130
Normal wiper speed 49
Rain sensor* 130
Rear window wiper/washer 51
Replacing wiper blades 273
Simultaneous wiping and washing 51
Single wipe 50
Switching on 49
Wiping with windshield washer
fluid 50
Winter driving
Snow chains 231
Tires 230
Winter driving instructions 198
Winter tires 230Wiper blades
Cleaning 237
Installing 273
Removing 273
Replacing 273
Wiper switch 49
Wiper/washer
Rear window 51
Wiping
And washing simultaneously 50
Intermittent 49, 130
With windshield washer fluid 50
Wiping and washing simultaneously 51
X
Xenon headlamps*
Bi-Xenon* 311

Short-circuit resistance
Zero potential connection of components
No oxidation
Low weight of fiber optical cable
Minimum diameter of wiring harness
The digital data bus (D2B) has a closed ring structure. The communication and data components are arranged
here in a distributor line (in-series circuit). This arrangement is type specific and is illustrated by way of an
example on model 220 as follows:
Radio (A2)
CD player with changer (in trunk) (A2/6), with code (819) 6-disc CD changer
Sound amplifier (A2/13), with code (810) Sound System
Voice control system control unit (A35/11), with code (813) voice control system (VCS)
Telephone and TELE AID transmitter/receiver, D2B (A35/17), with code (855) TELE AID
Data transfer is conducted here in one direction only, i.e. the optical pulses for the voice control system control
unit (A35/11), for vehicles with code (813) voice control system (VCS), on model 220 pass through all
components connected to the ring, before arriving at the target components.
When the system is first put into operation, a system test is performed. In doing so the individual components
and their sequence in the ring structure of the Digital Data Bus (D2B) are registered by the component with the
master function.
A type-specific sequence is stored ex-factory. In turn, the storing of a sequence ex-factory means: if the radio
(A2) is taken from one model series and installed into another one, then during a system test the different
sequence of the components and an error message are filed in the diagnostic trouble code memory.
An error message is also filed if the radio (A2) is exchanged within a model series with different equipment
components. The system goes to the operational state regardless of the error message. STAR DIAGNOSIS
enables the sequence of the components to be subsequently altered in the Digital Data Bus (D2B).
The Digital Data Bus (D2B) is diagnosis capable via the data link connector (X11/4), except for models 129
and 202.
The operating principle of the Digital Data Bus (D2B) is the same for all model series; all that changes is the
sequence of components depending on the national version and equipment specification.
TABLE OF CONTENTS, FUNCTION DESCRIPTION OF DIGITAL DATA BUS (D2B) - GF82.00-P-0999ZZ
MODEL 129 as of 1.6.98, 163, 168 as of 1.9.98, 170, 202 as of 1.6.98, 203, 208, 210 as of 1.6.98, 215, 220
Data transfer, function GF82.00-P-2000A
2001 Mercedes-Benz ML320
1998-2005 ACCESSORIES & BODY, CAB Electrical System - Body - 163 Chassis
me
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