2007 MERCEDES-BENZ GL450 turn signal

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).

541 Practical hints
Towing the vehicle
Warning!G
With the engine not running, there is no
power assistance for the brake and steering
systems. In this case, it is important to keep
in mind that a considerably higher degree of
effort is necessary to brake and steer the
vehicle. Adapt your driving accordingly.
!When towing the vehicle with all wheels on
the ground:

The automatic transmission must be in
positionN (
page 193).

The starter switch must be in position2
(
page 41).
Keep in mind that it is important that the
starter switch is in position2. As soon as the
SmartKey is removed from the starter
switch or the engine is turned off with
KEYLESS-GO* and you open the driver’s
door or the front passenger door, the auto-
matic transmission will shift to park
positionP, see “Starter switch positions”
(
page 41).

The battery must be connected and charged.
Otherwise, the starter switch cannot be set
to position2 and the automatic transmission
will remain locked in positionP.
!Towing of the vehicle should only be done
using the properly installed towing eye bolt.
Never attach a tow cable, tow rope or tow rod to
the vehicle chassis, frame or suspension parts.
iWhen towing the vehicle with all wheels on
the ground, note the following:
With the automatic central locking activated and
the starter switch in position2 (
page 41), the
vehicle doors lock if a wheel is turning at a speed
of approximately 9 mph (15 km/h) or above.
To prevent the vehicle doors from locking,
deactivate the automatic central locking
(
page 130).
iTo signal turns while being towed with
hazard warning flasher in use, set the starter
switch to position2 and activate combination
switch for left or right turn signal in usual manner
– only the selected turn signal will operate.
Upon canceling the turn signal, the hazard
warning flasher will operate again.

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*

582 Index
Multifunction display messages 451
ABS 453
Air suspension 490
Air suspension package* 490
Brake fluid 472
Brake lamps 481
Brake pads 470
Check engine 472
Coolant 475
Cruise control 454
Distronic* 455
Doors 478
Downhill Speed Regulation 470
EBP 471
Engine coolant 473, 475
Engine oil 476
ESP® 441
Fog lamps, Front 481
Fog lamps, Rear 484
Front passenger front air bag 463,
464, 465, 466
Fuel cap 478
Gear selector lever 461
Headlamps 481, 483, 484, 486
Hood 478Key, SmartKey 480
Key, SmartKey with
KEYLESS-GO* 479, 480
Lamps 481, 483, 484, 486
Low tire pressure 467, 488, 489
Parking brake 461, 471
Parking lamps 482
Tele Aid 487
Telephone* 487
Turn signals 486
Vehicle battery 469
Windshield washer fluid 487
Multifunction steering wheel 30, 158
Button operation 158
N
Navigation system* 168
See separate COMAND System
operating instructions
Net, Cargo* 313
Net, Parcel 320
Neutral gear position, Automatic
transmission 192
New vehicle, Break-in period 348
Night security illumination 148, 179
Normal occupant weight 417
Number, Vehicle Identification (VIN) 550O
Occupant distribution 417
Occupant safety 74
Active head restraint 92
Air bags 76
Children and air bags 77, 93, 96
Children in the vehicle 93
Fastening the seat belt 54
Front passenger front air bag off
indicator lamp 82, 85, 86
Infant and child restraint systems 94
LATCH-type child seat anchors 97
OCS* 81
OCS*, Messages in the multifunction
display 463, 464, 465, 466
Seat belts 54, 78
OCS* 81
Self-test 86
Odometer 156, 157, 164

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