low beam MERCEDES-BENZ R320 2008 W251 User Guide

457 Practical hints
What to do if …
Display symbolDisplay messagePossible cause/consequencePossible solution
.License Plate Lamp
LeftThe left license plate lamp is
malfunctioning.Replace the bulb as soon as possible
(
page 480).
License Plate Lamp
RightThe right license plate lamp is
malfunctioning.Replace the bulb as soon as possible
(
page 480).
Low Beam
LeftThe left low beam lamp is
malfunctioning.Halogen headlamp:
Replace the bulb as soon as possible
(
page 480).
Bi-Xenon* headlamp:
Contact an authorized Mercedes-Benz
Light Truck Center as soon as possible.
Low Beam
RightThe right low beam lamp is
malfunctioning.Halogen headlamp:
Replace the bulb as soon as possible
(
page 480).
Bi-Xenon* headlamp:
Contact an authorized Mercedes-Benz
Light Truck Center as soon as possible.

481 Practical hints
Replacing bulbs
Front lampsRear lamps
LampType
1Parking/standing lampW 5 W
2Turn signal lampPY 21 W
3Additional turn signal
lamp
LED
4Headlamps:
Low beam
H7 (55 W)
Bi-Xenon headlamps*:
Low beam1D2S-35 W
5Headlamps:
High beam/high beam
flasher
H7 (55 W)
Bi-Xenon headlamps*:
High beam/high beam
flasher spot lamp
H7 (55 W)
6Side marker lampWY 5 W
7Front fog lampH7 (55 W)
Corner-illuminating
front fog lamp*
H7 (55 W)
1Vehicles with Bi-Xenon* headlamps: Do not
replace the Bi-Xenon bulbs yourself. Contact an
authorized Mercedes-Benz Light Truck Center.
LampType
LampType
8High-mounted brake
lamp
LED
9Tail, brake, and side
marker lamp
P 21 W
aTurn signal lampPY 21 W
bBackup lampP 21 W
cRear fog lamp (driver’s
side only)
P 21 W
dLicense plate lampsC 5 W

482 Practical hints
Replacing bulbs
Notes on bulb replacement

Only use 12-volt bulbs of the same type
and with the specified watt rating.

Switch the lights off before changing a
bulb to prevent short circuits.

Always use a clean lint-free cloth when
handling bulbs.

Your hands should be dry and free of oil
and grease.

If the newly installed bulb does not
come on, contact an authorized
Mercedes-Benz Light Truck Center.Have the LEDs and bulbs for the following
lamps replaced by an authorized
Mercedes-Benz Light Truck Center:

the additional turn signal lamps in the
exterior rear view mirrors

the high mounted brake lamp

the Bi-Xenon* low beam lamps

the Bi-Xenon* high beam flasher spot-
light

the front side marker lamps
Warning!G
Bulbs and bulb sockets can be very hot.
Allow the lamp to cool down before chang-
ing a bulb.
Keep bulbs out of reach of children.
Halogen lamps contain pressurized gas.
A bulb can explode if you:

touch or move it when hot

drop the bulb

scratch the bulb
Wear eye and hand protection.
Because of high voltage in Xenon lamps, it is
dangerous to replace the bulb or repair the
lamp and its components. We recommend
that you have such work done by a qualified
technician.!Do not replace the bulbs yourself. You could
otherwise damage the LEDs or parts of the
vehicle. Only have the LEDs replaced by an
authorized Mercedes-Benz Light Truck Center.

483 Practical hints
Replacing bulbs
Replacing bulbs for front lamps
Before you start to replace a bulb for a
front lamp, do the following first:
Turn the exterior lamp switch to
positionM (
page 143).
Open the hood (page 356).
Halogen headlamps
1Low beam/high beam headlamp cover2Bulb socket for turn signal lamp
2Bulb socket for turn signal lamp
3Bulb socket for low beam headlamp
4Bulb socket for high beam headlampLow beam headlamp bulbs
Turn cover 1 counterclockwise.
Remove cover 1.
Turn bulb socket 3 counterclockwise.
Pull bulb socket 3 out of the head-
lamp housing.
Pull the low beam bulb out of bulb
socket 3.
Insert the new low beam bulb into bulb
socket 3.
Insert bulb socket 3 into the head-
lamp housing.
Turn bulb socket 3 clockwise until it
engages.
Place cover 1 on the opening in the
headlamp housing.
Turn cover 1 clockwise until it
engages.

484 Practical hints
Replacing bulbs
High beam headlamp bulbs
Turn cover 1 counterclockwise.
Remove cover 1.
Turn bulb socket 4 counterclockwise.
Pull bulb socket 4 out of the head-
lamp housing.
Pull the high beam bulb out of bulb
socket 4.
Insert the new high beam bulb into bulb
socket 4.
Insert bulb socket 4 into the head-
lamp housing.
Turn bulb socket 4 clockwise until it
engages.
Place cover 1 on the opening in the
headlamp housing.
Turn cover 1 clockwise until it
engages.Front turn signal lamp bulbs
Pull bulb socket 2 out of the head-
lamp housing.
Pull the turn signal bulb out of bulb
socket 2.
Insert the new turn signal bulb into bulb
socket 2.
Insert bulb socket 2 into the head-
lamp housing.Bi-Xenon headlamps*
1Bulb socket for turn signal lamp
2Low beam/high beam headlamp cover
– Do not remove
1Bulb socket for turn signal lamp

485 Practical hints
Replacing bulbs
Low beam and high beam flasher spot
bulbs
Front turn signal lamp bulbs
Pull bulb socket 1 out of the head-
lamp housing.
Pull the turn signal bulb out of bulb
socket 1.
Insert the new turn signal bulb into bulb
socket 1.
Insert bulb socket 1 into the head-
lamp housing.Parking and standing lamp bulbs
1Bulb socket for parking and standing
lamp
Turn bulb socket 1 counterclockwise.
Pull bulb socket 1 out of the housing.
Pull the bulb out of bulb socket 1.
Insert the new parking and standing
lamp bulb into bulb socket 1.
Insert bulb socket 1 into the housing.
Turn bulb socket 1 clockwise until it
engages.Front fog lamp bulbs
1Front fog lamp
2Cover
3Retaining screws
Remove retaining screws3.
Take off cover 2.
Warning!G
Do not remove the low beam/high beam
cover for the Bi-Xenon* headlamp. Because
of high voltage in Bi-Xenon* lamps, it is dan-
gerous to replace the bulb or repair the lamp
and its components. We recommend that
you have such work done by a qualified
technician.
iThe following procedure also applies to
corner-illuminating front fog lamps*.


555 Index
Messages in the multifunction
display 453–454
Opening the power windows
(Summer opening feature) 244
Opening the tilt/sliding panel*
(Summer opening feature) 244
Opening the tilt/sliding sunroof*
(Summer opening feature) 244
Remote control 113
Replacing batteries 479
Selective settings 117
Start/stop button 41
Starter switch positions 39, 41
Starting the engine 54
Turning off engine 66
Unlocking and opening, Power
tailgate* 121
Kickdown 197
Kilopascal 394L
Labels 524
Certification label 524
Emission control information 525
Engine number 525
Paint code 524
Vehicle Identification Number
(VIN) 525
Lamps, exterior 481
Front 481
Light sensor, Messages in the multi-
function display 455
Messages in the multifunction
display 455–460
Rear 481
Lamps, Indicator and warning
ABS 27, 414, 415
Brakes 27, 415
Center console 31, 425
CHECK ENGINE 29, 417, 418
Distance warning lamp* 266
Engine diagnostics 29, 417, 418
ESP
®27, 419
Front passenger front
air bag off 76, 77, 81, 82, 425Fuel reserve 29, 424
High beam headlamps 29
Instrument cluster 26, 414
Parktronic* 283, 284
Preglow indicator, Diesel engine 29
Seat belt telltale 29, 82, 420
Seat heating* 139
Seat ventilation* 140
SRS 29, 70, 85, 424
Turn signals 27
Language, Setting 174
LATCH-type child seat anchors see
Children in the vehicle
Leather upholstery, Cleaning and
care of 412
License plate lamps 481
Messages in the multifunction
display 457
Replacing bulbs 481, 488
Light alloy wheels, Cleaning 410
Light sensor
Messages in the multifunction
display 455
Lighter see Cigarette lighter

556 Index
Lighting
Parking lamps 143
Lighting, Exterior and interior 143
Limp-home mode 202, 417, 418
Loading see Vehicle loading
Loading terminology 393
Locator lighting 146, 178
Lock buttons, KEYLESS-GO*
Outside door handle 68
Loss of keys, Mechanical key 118
Loss of keys, SmartKey 118
Loss of keys, SmartKey with
KEYLESS-GO* 118
Loss of Service and Warranty Information
Booklet 523
Low beam headlamps
Messages in the multifunction
display 455–460
Replacing bulbs 483
switching on 58, 143
Lubricants 536M
Maintenance 12, 400
Calling up service indicator
display 402
Clearing service indicator
message 401
Maintenance System 400
Resetting service indicator 402
Service indicator message 400
Service term exceeded 401
Manual headlamp mode see Headlamps
Maximum cooling, MAXCOOL see Auto-
matic climate control (3-zone)*
Maximum inflation pressure, Tires 395
Maximum load rating, Tires 395
Maximum loaded vehicle weight,
Tires 395
Mechanical key 474
Memory function* 141Menus see Control system menus
Messages in display see Multifunction dis-
play messages
Microphone, Hands-free 33
Mirrors
Adjusting 48
Auto-dimming* 203
Exterior rear view mirrors 48
Interior rear view mirror 48, 203
Mobile phone see Telephone*
MON 540
Multicontour seats* 132
Multifunction display 157
Changing settings see Control system
menus and Control system
submenus
Selecting language 174
Standard display 161

560 Index
Replacing bulbs 480
Backup lamps 480, 481, 487
Brake lamps 480, 481, 487
Fog lamps, Front 480, 481, 483, 485
Fog lamp, Rear 480, 481, 487, 488
Headlamps 480, 481, 483
License plate lamps 480, 481, 487,
488
Low beam headlamps 480, 481, 483
Parking lamps 480, 481, 483, 485,
487, 488
Side marker lamps, Front 480, 487
Side marker lamps, Rear 480, 481,
487, 488
Standing lamps 480, 481, 483, 485,
487, 488
Tail lamps 480, 481, 487
Turn signal lamps 480, 481, 483,
485, 487
Reporting safety defects 18
Reset button, In instrument cluster 154Reset tool
Active head restraints,
Depository 478
Residual heat utilization 235
Restraint system
See Children in the vehicle
See SRS
See Infant and child restraint systems
Reverse gear position, Automatic
transmission 190, 194
Rims 395, 529
Roadside Assistance 12
Roadside Assistance button see Tele Aid*
Roller sunblinds, Panorama roof* 252
RON 540
Roof rack* 288
Rubber parts, Cleaning 410
Run Flat Indicator (Canada only) 374S
Safety
Driving safety systems 99
Occupant safety 70
Reporting safety defects 18
Safety belts see Seat belts
Satellite radio* 166
Scissors-type vehicle jack 470
Seat belt force limiter 85
Seat belt height adjustment 52
Seat belts 82
Children in the vehicle 87
Cleaning 411
Fastening 50
Height adjustment 52
Proper use of 52, 84
Safety guidelines 74
Telltale 29, 82, 420
Seat heating* see Seats 140
Seat ventilation* see Seats
Seating capacity 367