2008 MERCEDES-BENZ GL550 wiper fluid

Contents
Replacing wiper blades ...................... 516
Front wiper blades ....................... 516
Rear wiper blade .......................... 517
Flat tire .............................................. 519
Preparing the vehicle.................... 519
Mounting the spare wheel ............ 520
Bleeding the fuel system
(diesel engine only) ............................ 527
Battery ............................................... 528
Disconnecting, removing,
reinstalling and
reconnecting the battery .............. 530
Charging the battery .................... 535
Jump starting ..................................... 536
Towing the vehicle ............................. 538
Installing towing eye bolt.............. 540
Stranded vehicle .......................... 542
Fuses ................................................. 543
Fuse box in engine compartment . 544
Fuse box in cargo compartment ... 544
Fuse box in
passenger compartment .............. 545
Emergency engine shut-down ...... 545
Technical data................................. 547
Parts service ...................................... 548
Warranty coverage............................. 549
Loss of Service and Warranty
Information Booklet ..................... 549
Identification labels ........................... 550
Layout of poly-V-belt drive ................. 552
GL 320 CDI .................................. 552
GL 450, GL 550............................ 552
Engine................................................ 553
Rims and tires.................................... 555
Same size tires ............................. 556
Minispare wheel ........................... 558
Electrical system ............................... 559
Main Dimensions ............................... 560
Weights.............................................. 561Fuels, coolants, lubricants ................. 562
Capacities .................................... 562
Engine oils ................................... 564
Engine oil additives ...................... 564
Air conditioning refrigerant .......... 564
Brake fluid.................................... 564
Premium unleaded gasoline
(gasoline engine).......................... 565
Fuel requirements ........................ 565
Gasoline additives
(gasoline engine).......................... 566
Coolants ...................................... 567
Windshield washer system and
headlamp cleaning system*......... 569
Index................................................. 571
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23 At a glance
Exterior view
ItemPage
1Tailgate122
Power tailgate*123
Cargo compartment

Loading instructions301

Cargo tie-down rings302

Hooks304

Expanding304

Cover blind310

Cargo net*312
Vehicle tool kit490
Spare wheel494
2Rear window defroster212
3Rear lamps505
4Fuel filler flap374
Refueling374
Fuel375,
565
ItemPage
5Exterior rear view mirrors
Adjusting51
Auto-dimming rear view
mirrors*208
Power folding*209
6Towing eye bolt
Installing towing eye bolt540
7Tires and wheels384,
555
Checking tire inflation
pressure395
General information384
Flat tire519
Spare wheel494
8Hood378
Opening378
Engine oil380
Coolant381
ItemPage
9Windshield wipers62
Wiper blades, replacing516
Wiper blades, cleaning431
aWindshield
Cleaning with wiper fluid64
Cleaning431
bRoof rails295
Carriers*296
cPower tilt/sliding sunroof*251
dDoors
Locking and unlocking112
Opening120
Unlocking/locking in an
emergency496
eFront lamps505
fHeadlamp cleaning system*208
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62 Getting started
Driving
Turn signals
The combination switch is located on the
left of the steering column.
Combination switch
1Turn signals, right
2Turn signals, left
Press the combination switch in
direction of arrow1 or2.
The corresponding turn signal indicator
lampL orK in the instrument
cluster flashes (
page 26).The combination switch resets automati-
cally after major steering wheel move-
ment.
Windshield wipers
The combination switch is located on the
left of the steering column.
Combination switch
1Single wipe
Wiping with windshield washer fluid
2Switching on windshield wipers
Switch on the ignition (page 42).
iTo signal minor directional changes such as
changing lanes, press combination switch only
to point of resistance and release. The corre-
sponding turn signal will flash three times.
!Do not operate the windshield wipers when
the windshield is dry. Dust that accumulates on
a windshield might scratch the glass and/or
damage the wiper blades when wiping occurs on
a dry windshield. If it is necessary to operate the
windshield wipers in dry weather conditions,
always operate the windshield wipers with wind-
shield washer fluid (
page 64).
!If anything blocks the windshield wipers
(leaves, snow, etc.), switch them off immediate-
ly.

For safety reasons, stop the vehicle in a safe
location and

remove SmartKey from starter switch
or

turn off the engine by pressing the
KEYLESS-GO* start/stop button and
open the driver’s door (with the driver’s
door open, starter switch is in
position0, same as with SmartKey
removed from starter switch)
before attempting to remove any blockage.

Remove blockage.

Turn the windshield wipers on again.
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63 Getting started
Driving
Switching on windshield wipers
Turn the combination switch to the
desired position depending on the
intensity of the rain.
MWindshield wipers off
USlow intermittent wiping
Rain sensor operation with low
sensitivity.
VFast intermittent wiping
Rain sensor operation with high
sensitivity.
uSlow continuous wiping
tFast continuous wipingIntermittent wiping
Only switch on intermittent wiping under
wet weather conditions or in the presence
of precipitation.
When you select intermittent wiping, the
rain sensor is activated. The rain sensor
automatically sets a suitable wiping
interval depending on the wetness of the
sensor surface.
Turn the combination switch to
positionU orV.After the initial wipe, pauses between
wipes are automatically controlled by the
rain sensor.
Single wipe
Press the combination switch briefly in
direction of arrow1 to the resistance
point.
The windshield wipers wipe one time
without washer fluid.
If windshield wipers fail to function at all in the
combination switch positionU orV,

set the combination switch to the next
higher wiper speed

have the windshield wipers checked at the
nearest authorized Mercedes-Benz Light
Truck Center
!Do not leave windshield wipers on an inter-
mittent setting when the vehicle is taken to an
automatic car wash or during windshield clean-
ing. Wipers will operate in the presence of water
sprayed on the windshield, and windshield
wipers may be damaged as a result.
!If you have set intermittent wiping, dirt on
the surface of the rain sensor or optical effects
may cause the windshield wipers to wipe in an
undesired fashion. This could then damage the
windshield wiper blades or scratch the windows.
You should therefore switch off the windshield
wipers when weather conditions are dry.
iIntermittent wiping is interrupted when the
vehicle is at a standstill and a front door is
opened. This protects persons getting into or out
of the vehicle from being sprayed.
Intermittent wiping will be continued when all
doors are closed and

the automatic transmission is set to
positionD orR
or

the wiper setting is changed using the
combination switch
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64 Getting started
Driving
Wiping with windshield washer fluid
Press the combination switch in direc-
tion of arrow1 past the resistance
point.
The windshield wipers operate with
washer fluid.
For information on cleaning the headlamps
with washer fluid, see “Headlamp cleaning
system*” (
page 208).
For information on filling up the washer
reservoir, see “Windshield/rear window
washer system and headlamp cleaning
system*” (
page 383).
Rear window wiper/washer
The combination switch is located on the
left of the steering column.
Combination switch
1Rear window wiper switch
2Wiping rear window with washer fluid
3Intermittent wiping
4Rear window wiper off
5Wiping rear window with washer fluid6Rear window wiper indicator
Switch on the ignition (page 42).
Activating intermittent wipe
Turn rear window wiper switch1 to
position3 (
page 64).
In the lower multifunction display you
will see indicator6, indicating that
the rear window wiper is activated.
iTo prevent smears on the windshield or
noisy/chattering wiper blades, wipe with
windshield washer fluid every now and then even
when it is raining.
iThe rear window wiper engages automatical-
ly when the automatic transmission is shifted to
positionR with the windshield wipers switched
on.
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65 Getting started
Driving
Deactivating intermittent wipe
Turn rear window wiper switch1 to
position4 (
page 64).
Indicator6 (
page 64) for the rear
window wiper is cleared from the lower
multifunction display, indicating that
the rear window wiper is deactivated.
Wiping with windshield washer fluid
Turn and hold rear window wiper
switch1 in position2 or5
(
page 64) until the rear window is
clean.
The rear window wiper operates with
washer fluid.
For information on filling up the washer
reservoir, see “Windshield/rear window
washer system and headlamp cleaning
system*” (
page 383).
Problems while driving
The engine runs erratically and misfires

An ignition cable may be damaged
(gasoline engine only).

The engine electronics may not be
operating properly.

Unburned gasoline may have entered
the catalytic converter and damaged it
(gasoline engine only).
Give very little gas.
Have the problem repaired by an
authorized Mercedes-Benz Light Truck
Center as soon as possible.The coolant temperature is above
248°F (120°C)
The coolant is too hot and is no longer
cooling the engine.
Stop the vehicle in a safe location as
soon as possible and turn off the en-
gine. Allow engine and coolant to cool
off.
Check the coolant level and add cool-
ant if necessary (
page 381).
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208 Controls in detail
Good visibility
For information on windshield wipers, see
“Windshield wipers” (
page 62).
Headlamp cleaning system*
The headlamps will automatically be
cleaned with a high-pressure water jet
when you have

switched on the headlamps
and

operated the windshield wipers with
windshield washer fluid five times
When you switch off the headlamps, the
counter resets.
For information on filling up the washer
reservoir, see “Windshield/rear window
washer system and headlamp cleaning
system*” (
page 383).
Rear view mirrors
For more information on setting the rear
view mirrors, see “Mirrors” (
page 51).
Interior rear view mirror, antiglare
position
1Lever
Tilt the mirror to the antiglare position
by moving lever1 towards the wind-
shield.
The interior rear view mirror is dimmed.Auto-dimming rear view mirrors*
The reflection brightness of the exterior
rear view mirror on the driver’s side and
the interior rear view mirror will respond
automatically to glare when

the ignition is switched on
and

incoming light from headlamps falls on
the sensor in the interior rear view
mirror
The rear view mirror will not react if

the automatic transmission is set to
positionR

the interior lighting is turned on
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594 Index
Vehicle status message memory
menu 167
Vehicle tool kit 490
Vehicle washing 427
VIN 551
Voice control system*
Button on multifunction steering
wheel 30, 156
Hands-free microphone 34
W
Warning indicators
Parktronic* 290
Warning lamps see Lamps, Indicator and
warning
Warning sounds
Distance warning function* 272
Distronic* 263
Exterior lamps 143
Parking brake 60
Parktronic* 292
Seat belt telltale 86Warranty coverage 10, 549
Washer fluid see Windshield washer fluid
Washer reservoir level 569
Washing the vehicle 425
Wear pattern, Tires 419
Weights, Vehicle 561
Wheel
Bolts 492
Change 520
Removing 524
Spare 495, 520
Tightening torque 526
Wheel, Tires and 384
Wheels
Sizes 556
Window curtain air bags 80
Windows see Power windows
Windows, cleaning 431
Windshield
Cleaning 431
Cleaning wiper blades 431
Cleaning, Windshield washer fluid 64
Defogging 222, 237
Infrared reflecting* 344
Washer fluid 383, 563, 569Windshield washer fluid
Messages in the multifunction
display 483
Mixing ratio 569
Refilling 383
Reservoir level 383
Wiping with 64
Windshield washer system 383, 569
Windshield wipers 62
Cleaning wiper blades 431
Fast continuous wiping 63
Fast intermittent wiping 63
Rear window wiper/washer 64
Replacing wiper blades 516
Slow continuous wiping 63
Slow intermittent wiping 63
Winter driving 420
Snow chains 421
Tires 420
Winter driving instructions 353
Winter tires 420
Wood trims, cleaning 434
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