2003 MERCEDES-BENZ ML320 high beam

249 Practical hints
Replacing bulbs
Replacing bulbs for front lamps
Replacing low beam bulbs
1Low beam halogen or Bi-Xenon* head-
lamp cover with locking tab2Electrical connector
Bi-Xenon* headlampHalogen headlamp

Switch off the lights.

Open the hood (
page 202).

Push down tab at top end of cover1
and remove.

Pull electrical connector2 off.

Unclip the retainer springs and take out
the bulb.

Insert the new bulb so that the base lo-
cates in the recess on the holder.

Clip the retainer springs.

Plug the connector2 onto the bulb.

Align headlamp cover and click into
place.
Warning!
G
Do not remove the cover1 for the Bi-Xenon
headlamp. Because of high voltage in xenon
lamps, it is dangerous to replace the bulb or
repair the lamp and its components. We rec-
o mme n d th at y o u h av e s uc h wo rk don e by a
qualified technician.

250 Practical hintsReplacing bulbsHigh beam bulbs
1High beam headlamp cover with lock-
ing tab
Switch off the lights.

Open the hood (
page 202).

Twist cover1 counterclockwise and re-
move.2Electrical connector

Pull electrical connector2 off.

Unclip the retainer springs and take out
the bulb.

Insert the new bulb so that the base lo-
cates in the recess on the holder.

Clip the retainer springs.

Plug the connector2 onto the bulb.

Align headlamp cover and click into
place.Turn signal, parking, standing and side
marker lamp bulbs
1Bulb socket

Switch off the lights.

Open the hood (
page 202).

Twist bulb socket1 counterclockwise
and pull out.

Push bulb into socket, turn counter-
clockwise and remove.

Insert new bulb in socket, push in and
twist clockwise.

Reinstall the bulb socket.


253 Practical hints
Replacing bulbs

Insert reflector from the left so that it
engages on the right.

Position tabs of cover in slots and rein-
stall cover until properly seated.
Adjusting headlamp aim
VVertical centerline
HHeadlamp mounting high, measured
from the center Correct headlamp adjustment is extremely
important. To check and readjust a head-
lamp, follow the steps described:

Park the vehicle on a level surface
25 feet (7.6 m) from a vertical test
screen or wall.

Switch the headlamps on
(page 102).
If the beam does not show a beam pattern
as indicated in the figure left, then follow
the steps below:

Open hood (
page 202).
2Headlamp vertical adjustment screw
3Headlamp vertical adjustment screw

Always turn adjustment screws2
and3 simultaneously for vertical ad-
justment until the headlamp is adjust-
ed as shown1. Turn clockwise for
upward movement and counterclock-
wise for downward movement.
Graduations:
screw2:0.50° pitch
screw3:0.67° pitch
The left and right headlamps must be ad-
justed individually.
iHigh beam adjustments simultaneous-
ly aim the low beam.
Vehicle should have a normal trunk
load.
iIf it is not possible to obtain a proper
headlamp adjustment, have the system
checked at your authorized
Mercedes-Benz Light Truck Center.

293 Technical terms
ABS
(A
ntilock B
rake S
ystem)
Prevents the wheels from locking up
during braking so that the vehicle can
continue to be steered.
BabySmart
TM
airbag deactivation
system
This system detects if a special system
compatible child restraint seat is in-
stalled on the front passenger seat. The
system will automatically deactivate
the passenger front airbag when such a
seat is properly installed (indicator
lamp
7
in the instrument cluster
lights up). See your authorized
Mercedes-Benz Light Truck Center for
availability.
BabySmartTM
compatible child seats
Special restraint system for children.
The sensor system for the passenger
seat prevents deployment of the pas-
senger front airbag if a BabySmart
TM
compatible child seat is installed.BAS
(B
rake A
ssist S
ystem)
System for potentially reducing braking
distances in emergency braking situa-
tions. The system is activated when it
senses an emergency based on how
fast the brake is applied.
Bi-Xenon headlamps*
Headlamps which use an electric arc as
the light source and produce a more in-
tense light than filament headlamps.
Bi-Xenon headlamps produce low
beam and high beam.
CAC
(C
ustomer A
ssistance C
enter)
Mercedes-Benz customer service cen-
ter, which can help you with any ques-
tions about your vehicle and provide
assistance in the event of a break-
down.CAN system
(C
ontroller A
rea N
etwork)
Data bus network serving to control ve-
hicle functions such as door locking or
windshield wiping.
Cockpit
All instruments, switches, buttons and
indicator/warning lamps in the passen-
ger compartment needed for vehicle
operation and monitoring.
Cruise control
Driving convenience system for auto-
matically maintaining the vehicle speed
set by the driver.
Engine number
The number set by the manufacturer
and placed on the cylinder block to
uniquely identify each engine pro-
duced.

299 Index
A
ABS 25, 71, 293
ABS control 71
LOW RANGE mode 72
Malfunction indicator lamp 225
Warning lamp 225
Accelerator position, automatic
transmission 117
Accident
In case of 49
Activating
Air circulation mode 130
Air recirculation mode 129
Anti-theft alarm system 78
Automatic climate control 125
ESP 77
Exterior headlamps 46
Hazard warning flasher 106
Headlamps 46
High beams 102
Ignition 33
Immobilizer 51, 78
Rear passenger compartment
ventilation and climate control 131
Rear window defroster 131
Rear window wiper 48Residual heat 130
Seat heater 91
Tow-away alarm 80
Warning indicators (Parktronic*) 151
Windshield wipers 48
Activating automatic central locking 89
Adding
Coolant 206
Engine oil 204, 205
Additional turn signals 247
Adjustable steering column
Indicator lamp 229
Adjusting 34
Backrest tilt 36, 37
Exterior rear view mirror 38
Head restraint height 36, 37
Head restraint tilt 36, 37
Headlamp aim 253
Instrument cluster illumination 110
Manual seat 35
Mirrors 38
Power seats 37
Seat cushion tilt 37
Seat fore and aft 35
Seat fore and aft adjustment 37
Seat height 35, 36Seats 34
Steering wheel 37
Adjusting air distribution
Automatic climate control 127
Adjusting air volume
Automatic climate control 127
Air conditioner (cooling)
Turning on 129
Air conditioning
Cooling 129
Air conditioning refrigerant 286
Air outlets
Automatic climate control 132
Air pressure see Tire inflation pressure 211
Air pump 238
Air recirculation mode 128
Activating 129
Deactivating 129
AIRBAG OFF
Warning lamp 232
Airbags 55
BabySmart
TM airbag deactivation
system 293
BabySmartTM deactivation system 65
Children 56
Front 59

301 Index
B
BabySmart
TM
Airbag deactivation system 65
Compatible child seats 65, 293
Self-test 66
BabySmart
TM airbag deactivation
system 293
Backrest tilt 35
Backup lamps 248, 251
Bulbs 248
BAS 73, 293
Malfunction indicator lamp 225, 226
Warning lamp 225, 226
Batteries, remote control
Changing 243
Batteries, vehicle 207
Battery discharged
Jump starting 264
Battery indicator lamp
Indicator lamp 233
Battery, vehicle 207, 261
Charging 262
Disconnecting 261
Reconnecting 262
Reinstalling 262
Removing 262Bi-Xenon headlamps* 293
Block heater 214
Blocking
Rear door window operation 69
Brake assist system (BAS) 293
Brake fluid 286
Brake lamp bulbs 248
Brake lamp, high mounted 248
Brake pad wear
Indicator lamp 234
Brakes 180
Warning lamp 228
Break-in period 178
Bulbs, replacing 247
Additional turn signals 247
Backup lamps 248
Brake lamps 248
Fog lamps 247
Front fog lamp 251
Front lamps 247
High beam 247
High mounted brake lamp 248, 252
License plate lamps 248, 252
Low beam 247
Parking lamps 247, 248, 250
Rear fog lamp 248Rear fog lamps 251
Rear side marker lamp bulbs 251
Side marker lamps 247, 248, 250
Standing lamps 247, 248
Tail lamp assemblies 248, 251
Turn signal lamps 247, 248, 250
C
CAC (Customer Assistance Center) 293
Calibrating compass 174
California
Important notice 11
Calling up
Service indicator 216
CAN system 293
Capacities
Fuels, coolants, lubricants, etc. 284
Cargo area cover blind* 143
Closing 143
Installing 143
Opening 143
Removing 143
Cargo area see Cargo compartment 85
Cargo compartment
Liftgate 85
Lighting 109
Tie-down rings 140

302 IndexCargo floor plates 144
Installing 144
Removing 144
Storing 144
Cargo tie-down rings 140
Catalytic converter 198
CD-changer* 238
Center console 27
Lower part 28
Upper part 27
Central locking
Automatic 89
From inside 89
Switch 90
Unlocking from inside 89, 90
Central locking switch 90
Certification label 276
Charge indicator lamp 233
Charging
Vehicle battery 262
Chart
Fuses 271
CHECK ENGINE malfunction indicator
lamp 232
Checking
Coolant level 201, 206Oil level 201, 203
Tire inflate pressure 201
Vehicle lighting 201
Checking weights
Trailer and vehicle 193
Checklist
Off-road driving 187
Returning from off-road driving 191
Child safety 63
Airbags 56
Infant and child restraint systems 54,
60, 63
LATCH child seat mounts 68
Child safety switch see Blocking of rear
door window operation 69
Cigarette lighter
Front center console 156
Cleaning
Cup holder 221
Gear selector lever 221
Hard plastic trim items 221
Headlamps 121
Headliner 221
Instrument cluster 221
Leather upholstery 222
Light alloy wheels 221MB Tex upholstery 222
Plastic and rubber parts 222
Seat belts 221
Steering wheel 221
Windows 220
Windshield 48
Wiper blades 220
Cleaning and care of the vehicle see
Vehicle care 217
Clock 26, 112
Closing
Glove box 152
Hood 203
Liftgate 88
Rear quarter windows* 136
Side windows 135
Sliding/pop-up roof 246
Sliding/pop-up roof* 137
Closing sliding/pop-up roof
In an emergency 246
Cockpit 22, 293
Combination switch 102
High beam flasher 47, 102
Turn signals 47
Windshield wipers 47

307 Index
Headlamps
Automatic control 103
Bi-Xenon 293
Cleaning 220
Cleaning system 121
Cleaning system* 208
Refilling washer fluid 208
Switching off 51
Switching on 46
Washer fluid 290
Washer system 290
Headliner
Cleaning 221
Heated seats 91
Height adjustment
Head restraints 36, 37
Seat belts 43
Steering wheel 37
High beam flasher 47, 102
High beam headlamps
Replacing bulbs 247, 250
Switching on 102
High mounted brake lamp 248
Replacing bulbs 252Hood 202
Closing 203
Opening 202
Hooks
Loading 140
Hydroplaning 183
I
Identification labels 276
Certification label 276
Vehicle identification number
(VIN) 276
Ignition 33
Immobilizer 78
Activating 51, 78
Deactivating 78
Indicator lamp
Adjustable steering column 229
Brake pad wear 234
Coolant 230
Front fog lamps 229
Low engine oil level 229
Indicators, additional
Speedometer display 235
Infant and child restraint systems 63
Installing 67
LATCH child seat mounts 68Inflating
Spare tire 259
Information
About service and warranty 10
Button for Tele Aid* 165
Inside rear view mirror
Antiglare 119
Installing
Head restraint 92
Infant and child restraint systems 67
Wiper blades 254
Instrument cluster 24, 110, 294
Cleaning 221
Coolant temperature gauge 111
Display in the speedometer 111
Illumination 110
Lamps in 233
Outside temperature indicator 112
Instruments and controls see Cockpit 22
Integrated remote control
Canadian programming 171
Erasing memory 171
Hand-held transmitter 169
Operating 171
Rolling code programming 170