turn signal bulb MERCEDES-BENZ GL450 2007 X164 Owner's Manual

486 Practical hints
What to do if …
Display symbolDisplay messagesPossible cause/consequencePossible solution
. Turn signal
Front LeftThe left front turn signal lamp is
malfunctioning. A substitute
bulb is being used.Replace the bulb as soon as possible
(
page 513).
Turn signal
Front RightThe right front turn signal lamp is
malfunctioning. A substitute
bulb is being used.Replace the bulb as soon as possible
(
page 513).
Turn signal
Rear LeftThe left rear turn signal lamp is
malfunctioning. A substitute
bulb is being used.Replace the bulb as soon as possible
(
page 515).
Turn signal
Rear RightThe right rear turn signal lamp is
malfunctioning. A substitute
bulb is being used.Replace the bulb as soon as possible
(
page 515).
Turn signal
Left mirrorThe turn signal in the left exteri-
or rear view mirror is malfunc-
tioning. This message will only
appear if a critical number of
LEDs have stopped working.Contact an authorized Mercedes-Benz
Light Truck Center as soon as possible.
Turn signal
Right mirrorThe turn signal in the right exte-
rior rear view mirror is malfunc-
tioning. This message will only
appear if a critical number of
LEDs have stopped working.Contact an authorized Mercedes-Benz
Light Truck Center as soon as possible.

508 Practical hints
Replacing bulbs
Bulbs
Safe vehicle operation depends on proper
exterior lighting and signaling. It is there-
fore essential that all bulbs and lamp as-
semblies are in good working order at all
times.
Correct headlamp adjustment is extremely
important. Have headlamps checked and
readjusted at regular intervals and when a
bulb has been replaced. See an authorized
Mercedes-Benz Light Truck Center for
headlamp adjustment.iIf the headlamps or front fog lamps are
fogged up on the inside as a result of high humid-
ity, driving the vehicle a distance with the lights
on should clear up the fogging.iSubstitute bulbs will be brought into use
when the following lamps malfunction:

Turn signal lamps

Brake lamps

Parking lamps

Tail lamps
Read and observe the messages in the multi-
function display (
page 481).

509 Practical hints
Replacing bulbs
Front lamps
Rear lamps
LampType
1Parking and standing
lampW5W
2Headlamps:
High beam/high beam
flasher
H7 (55 W)
Bi-Xenon headlamps*:
High beam/high beam
flasher spot lamp
H7 (55 W)
3Headlamps:
Low beam
H7 (55 W)
Bi-Xenon headlamps*:
Low beam1
1Vehicles with Bi-Xenon* headlamps: Do not re-
place the Bi-Xenon bulbs yourself. Contact an
authorized Mercedes-Benz Light Truck Center.
D2S-35 W
4Additional turn signal
lampLED
5Side marker lampWY 5 W
LampType
6Turn signal lamp3457 AK
S-8
(30/2.2 cp
bulb)
7Front fog lampH11 (55 W)
Corner-illuminating
front fog lamp*
H11 (55 W)
LampType
8High mounted brake
lamp
LED
9Backup lampP21W
aTail, brake, parking,
standing, side marker
lampP21/4W
bTurn signal lampPY 21 W
cRear fog lamp (driver’s
side only)P21/4W
dLicense plate lampsC5W

510 Practical hints
Replacing bulbs
Notes on bulb replacement

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

Switch 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, visit 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*
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 LEDs yourself. You could
otherwise damage the LEDs or parts of the vehi-
cle. Only have the LEDs replaced by a an autho-
rized Mercedes-Benz Light Truck Center.
iReplacing the bulbs for the front lamps is a
technically complex process. For your conve-
nience, we recommend that you have this work
carried out by an authorized Mercedes-Benz
Light Truck Center.
Have the headlamp adjustment checked
regularly.

511 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 145).
Open the hood (page 379).
1Housing cover for low beam halogen
headlamp
2Housing cover for high beam halogen
bulb (high beam and high beam flasher)
3Bulb socket for parking and standing
lamp bulb
4Bulb socket for turn signal lamp bulb
5Bulb socket for side marker lamp bulbLow beam bulb (halogen headlamp)
1Low beam headlamp cover
2Bulb socket for low beam headlamp

513 Practical hints
Replacing bulbs
Turn cover1 counterclockwise.
Remove cover1.
Turn bulb socket2 counterclockwise.
Pull bulb socket2 out of the
headlamp housing.
Pull the high beam bulb out of bulb
socket2.
Insert the new high beam bulb into bulb
socket2.
Insert bulb socket2 into the
headlamp housing.
Turn bulb socket2 clockwise until it
engages.
Place cover1 on the opening in the
headlamp housing.
Turn cover1 clockwise until it engag-
es.Turn signal lamp bulb
1Bulb socket for turn signal lamp
Turn bulb socket1 counterclockwise.
Pull bulb socket1 out of the
headlamp housing.
Pull the turn signal bulb out of bulb
socket1.
Insert the new turn signal bulb into bulb
socket1.
Insert bulb socket1 into the
headlamp housing.
Turn bulb socket1 clockwise until it
engages.Parking and standing lamp bulb
Turn bulb socket3 (page 511)
counterclockwise.
Pull bulb socket3 out of the
headlamp housing.
Pull the bulb out of bulb socket3.
Insert the new bulb into bulb
socket3.
Insert bulb socket3 into the
headlamp housing.
Turn bulb socket3 clockwise until it
engages.

515 Practical hints
Replacing bulbs
4Bulb socket of front fog lamp bulb
Turn bulb socket4 counterclockwise.
Pull bulb socket4 out of the housing.
Pull the front fog lamp bulb out of bulb
socket4.
Insert the new front fog lamp bulb into
bulb socket4.
Insert bulb socket4 into the housing.
Turn bulb socket4 clockwise until it
engages.
Plug in the electrical connector.
Insert front fog lamp2 back into
bumper.
Fasten retaining screws3.
Reinsert cover1 and press it in until it
engages.
Additional turn signal lamps bulbs
The additional turn signal lamps in the
exterior rear view mirrors have LEDs.
If a malfunction occurs or L EDs f a il to f unc -
tion, the entire turn signal unit must be re-
placed. Have the turn signal unit replaced
by an authorized Mercedes-Benz Light
Truck Center.
Replacing bulbs for rear lamps
Before you start to replace a bulb for a rear
lamp, do the following first:
Turn the exterior lamp switch to
positionM (
page 145).
Tail lamp unit
Open the tailgate (page 124).
iTo access the bulb socket, you have to
remove the cover in the corresponding side trim
panel of the cargo compartment.

517 Practical hints
Replacing bulbs
Replacing bulbs
1Bulb socket
2Clamp
Press and hold clamps2.
Pull bulb socket1 outwards.
Bulb socket
1Backup lamp
2Tail lamp, brake lamp, parking and
standing lamp
3Tail lamp, brake lamp, parking and
standing lamp, side marker lamp
4Turn signal lamp
5Rear fog lamp (driver’s side only)
Depending on which bulb needs to be
replaced, turn the respective
bulb1-5 counterclockwise.
Pull the bulb out of the housing.
Insert the new bulb into the bulb sock-
et.
Turn the bulb in the bulb socket clock-
wise carefully.
Insert the bulb socket into the rear
lamp.
Align bulb socket and press bulb sock-
et into rear lamp until it audibly engag-
es.
Make sure bulb socket is attached
properly.
Close the respective cover in the cargo
compartment.
Close the tailgate (page 125).

580 Index
Kickdown 198
Kilopascal 416
L
Labels 550
Certification 550
Emission control information 551
Engine number 551
Paintwork code 550
Vacuum line routing diagram 551
Vehicle Identification Number
(VIN) 550
Lamp sensor see Light sensor
Lamps, exterior 509
Front 509
Light sensor, Messages in the
multifunction display 483
Messages in display 481
Messages in the multifunction
display 481, 483, 485
Rear 509
Switch 145Lamps, indicator and warning
ABS 27, 436
Adaptive Damping System
(ADS)* 281
Alarm system 112
Battery (SmartKey with
KEYLESS-GO*) 121
Battery (SmartKey) 116
Brakes 27, 437, 438
Center console 31, 32, 448
CHECK ENGINE 29, 439, 440
Differential locks* 207
Distance warning lamp* 265
Downhill Speed Regulation 276
Engine diagnostics 29, 439, 440
ESP® 27, 441, 442
Fog lamps, Front/rear 145
Front passenger front air bag off 31,
32, 80, 87, 450
Fuel reserve 29, 442
High beam headlamps 29
Instrument cluster 26, 28, 436, 437,
438, 439, 440, 441, 442, 443, 444,
445, 446
Off-road driving program 280
Parktronic* 292Preglow indicator, Diesel engine 29
Seat belt telltale 29, 91, 443
Seat belts 444
Seat heating* 140
Seat ventilation* 142
SRS 29, 74, 91, 445
Turn signals 27
Vehicle level control 283, 285
Language, Setting 174
LATCH-type child seat anchors see
Children in the vehicle
Layout of poly-V-belt drive (GL 450) 552
Layout of poly-V-belt drive
(GL 320 CDI) 552
Leather upholstery*, Cleaning and
care of 434
Lever for cruise control 257
License plate lamps 518
Messages in the
multifunction display 483
Replacing bulbs 509, 518
Light alloy wheels, Cleaning 432
Light sensor
Messages in the
multifunction display 483
Lighter see Cigarette lighter*

585 Index
Rear lamps see Tail lamps
Rear panorama roof, Sunshade 214
Rear seat head restraints see
Head restraints
Rear towing eye 542
Rear view camera* 295
Rear view mirrors see Mirrors
Rear window defroster 215
Rear window wiper/washer 65
Rear windows see Power windows
Rear wiper blade 521
Recommended tire inflation
pressure 417
Recovery services,
Stolen vehicle (Tele Aid) 339
Refrigerant, Air conditioning 562
Refueling 375
Regular checks 377
Reminder, Seat belt see Seat belts, Telltale
Remote control
SmartKey 114
SmartKey with KEYLESS-GO* 117
Remote door unlock, Tele Aid 338Replacing bulbs 508
Additional turn signals,
Exterior rear view mirrors 515
Backup lamps 508, 509, 515
Brake lamps 508, 509, 515
Corner-illuminating front fog
lamps* 508, 509, 514
Fog lamp, Rear 508, 509, 515
Fog lamps, Front 508, 509, 514
High beam headlamps 508, 509, 512
License plate lamps 508, 509, 518
Low beam headlamps 508, 509, 511
Parking/standing lamps 508, 509,
513, 515, 517
Side marker lamps, Front 508, 509,
511, 514
Side marker lamps, Rear 508, 509,
515, 517
Tail lamps 508, 509, 515, 517
Turn signal lamps, Front 508, 509,
513
Turn signal lamps, Rear 508, 509,
515, 517Reporting safety defects 19
Research Octane Number see RON
Reset button, In instrument cluster 171
Reset tool
Active head restraints,
Depository 504
Residual heat and ventilation 227, 242
Reverse gear position, Automatic
transmission 192
Rims 417, 554
Roadside Assistance 12
Roadside Assistance button see Tele Aid
RON 376, 563
Roof rails 297
Rubber parts, Cleaning 432
Run Flat Indicator (Canada only) 397
S
Safety
Driving safety systems 103
Occupant safety 74
Reporting safety defects 19
Safety belts see Seat belts
Satellite radio* 166
Seat belt force limiter 91