2008 MERCEDES-BENZ GL550 service indicator

375 Operation
At the gas station
Briefly push on fuel filler flap1 at the
position indicated by the arrow.
Fuel filler flap1 opens slightly.
Open fuel filler flap1 completely.
Turn fuel filler cap2 counterclock-
wise and hold on to it until possible
pressure is released.
Take off fuel filler cap2.
Set fuel filler cap2 on fuel filler
flap1 as shown.
To prevent fuel vapors from escaping
into open air, fully insert filler nozzle
unit.
Only fill your tank until the filler nozzle
unit cuts out – do not top off or over-
fill.
Replace fuel filler cap2 by turning it
clockwise until it audibly engages.
Close fuel filler flap1.
You should hear the latch close shut.
!The fuel filler cap is tethered to the fuel filler
neck. Do not drop the cap. It could damage the
vehicle paint finish.
Warning!G
Overfilling of the fuel tank may create pres-
sure in the system which could cause a gas
discharge. This could cause the gas to spray
back out when removing the fuel pump noz-
zle, which could cause personal injury.
iMake sure to close the fuel filler flap before
locking your vehicle as the flap locking pin
prevents closing after you have locked the
vehicle.
iLeaving the engine running and the fuel cap
open can cause the yellow fuel tank reserve
warning lamp to flash and the ?malfunction
indicator lamp (USA only) or the± malfunc-
tion indicator lamp (Canada only) comes on.
For more information, see “Practical hints”
(
page 439).
iGasoline engine:
Only use premium unleaded gasoline with a min-
imum Posted Octane Rating of 91 (average of
96 RON/86 MON). Information on gasoline
quality can normally be found on the fuel pump.
Please contact gas station personnel in case
labels on the pump cannot be found.
For more information on gasoline, see “Premium
unleaded gasoline (gasoline engine)”
(
page 565), see “Fuel requirements”
(
page 565), and the Factory Approved Service
Products pamphlet (USA only) or contact an
authorized Mercedes-Benz Light Truck Center.
iDiesel engine:
Only use commercially available vehicular
ULTRA-LOW SULFUR HIGHWAY DIESEL FUEL
(15 ppm SULFUR MAXIMUM). Information on
diesel quality can normally be found on the fuel
pump. Please contact gas station personnel in
case labels on the pump cannot be found.
For more information on diesel fuels, refer to the
Factory Approved Service Products pamphlet
(USA only) or contact an authorized
Mercedes-Benz Light Truck Center.

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422 Operation
Maintenance
We strongly recommend that you have
your vehicle serviced by an authorized
Mercedes-Benz Light Truck Center, in
accordance with the Maintenance Booklet
at the times called for by the maintenance
service indicator display.
Maintenance service indicator
message
The maintenance service indicator mes-
sage will notify you when the next mainte-
nance service is due.Starting approximately 1 month before the
next maintenance service is due, one of
the following messages will appear in the
multifunction display while you are driving
or when you switch on the ignition (exam-
ple service A):
Service A In XXXXX Miles (Km)
Service A In XXX Days
Service A In X Day
Service A Due Now
The maintenance services will be indicated
by showing a service type A through type H
in the multifunction display. Types A
through H are classified based on estimat-
ed time needed to perform the mainte-
nance service, ranging:
from
Service A
(approximately 1 hour)
to
Service H
(approximately 8 hours)Refer to Maintenance Booklet for a listing
of maintenance services and intervals they
need to be performed at.
!Failure to have the vehicle maintained in
accordance with the Maintenance Booklet and
maintenance service indicator at the designated
times/mileage will result in vehicle damage not
covered by the Mercedes-Benz Limited
Warranty.
iThe Maintenance System in your vehicle
tracks distance driven and the time elapsed
since the last maintenance service and calcu-
lates other maintenance service work required.
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423 Operation
Maintenance
Clearing the maintenance service
indicator message
The maintenance service indicator mes-
sage is automatically cleared

after approximately 10 seconds when
you switch on the ignition or when
reaching the maintenance service
threshold while driving

after approximately 30 seconds, once
the suggested maintenance service
term has passedYou can also clear it yourself:
1Reset button
Press reset button1 on the instru-
ment cluster.
The maintenance service indicator
message is cleared and the standard
display appears in the multifunction
display (
page 162).Maintenance service term exceeded
If you have exceeded the suggested main-
tenance service term, you will see the fol-
lowing message in the multifunction
display:
Service A Exceeded By XXXXX Miles (Km)
Service A Exceeded By XXX Days
Service A Exceeded By X Day
In addition, a signal sounds when the
message appears.
Any authorized Mercedes-Benz Light Truck
Center will reset the maintenance service
indicator following a completed mainte-
nance service.
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424 Operation
Maintenance
Calling up the maintenance service
indicator display
You can call up the maintenance service in-
dicator display at any time to check when
the next maintenance service is due.
Switch on the ignition (page 42).
Press buttonè orÿ on the mul-
tifunction steering wheel repeatedly
until the standard display appears in
the multifunction display (
page 162).
Press buttonk orj until the
maintenance service indicator display
with the service symbol9 and the
service deadline appears in the multi-
function display.Resetting the maintenance service
indicator
In the event that the maintenance service
on your vehicle is not carried out by an
authorized Mercedes-Benz Light Truck
Center, you can have the maintenance
service indicator reset. The automotive
maintenance facility carrying out the
maintenance service will find the informa-
tion for resetting the maintenance service
indicator in the maintenance-relevant
information for your vehicle. Such informa-
tion is available from any authorized
Mercedes-Benz Light Truck Center or di-
rectly from Mercedes-Benz.
iIf the battery is disconnected, the days of
disconnection will not be included in the count
shown by the maintenance service indicator.To arrive at the true maintenance service dead-
line, you will need to subtract these days from
the days shown in the maintenance service indi-
cator message or maintenance service indicator
display.
Do not confuse the maintenance service indica-
tor with the engine oil level indicatorN.
!If the maintenance service indicator was
inadvertently reset, have an authorized
Mercedes-Benz Light Truck Center correct it.
Only reset if the proper maintenance service has
been performed. Resetting the system without
performing the proper service as called for by
the maintenance service indicator will result in
engine damage and/or other vehicle damage not
covered by the Mercedes-Benz Limited
Warranty.
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439 Practical hints
What to do if …
ProblemPossible cause/consequenceSuggested solution
?(USA only)
±(Canada only)
The yellow engine malfunc-
tion indicator lamp comes
on while driving.There is a malfunction in:

The fuel management
system

The ignition system

The emission control system

Systems which affect
emissions
Such malfunctions may result in
excessive emissions values and
may switch the engine to its
limp-home (emergency opera-
tion) mode.
Have the vehicle checked as soon as
possible by an authorized
Mercedes-Benz Light Truck Center.
An on-board diagnostic connector is
used by the service station to link the
vehicle to the shop diagnostics system.
It allows the accurate identification of
system malfunctions through the read-
out of diagnostic trouble codes. It is lo-
cated in the front left area of the
footwell next to the parking brake pedal.
iSome states may by law require you to visit
a workshop as soon as the engine malfunction
indicator lamp comes on. Check local require-
ments.
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575 Index
Corner-illuminating front fog lamps* 147
Messages in the multifunction
display 478
Replacing bulbs 510
Crossbars* 295
Crossing obstacles 361
Cruise control 255
Activating 257
Messages in the multifunction
display 452
Cup holders 320
Cleaning 321
Front center console 321
Front center console,
Removing/Installing 321
Rear armrest 320
Curb weight 416
D
Date display, Setting 174
Daytime running lamp mode 145
Setting 175
Deep water see Standing water
Defogging windshield 221, 235
Defrosting, Front 221, 235
Defrosting, Rear 212Delayed shut-off
Exterior lamps 176
Interior lighting 177
Department of Transportation see DOT
Diesel engine
Preglow indicator lamp 29
Differential locks* 204
A few words about 204
Messages in the multifunction
display 488
Switching 205
Difficulties
While driving 65
While starting 59
Digital clock see Clock
Digital speedometer 155, 163
Dimensions, Vehicle 560
Direction of rotation (tires) 387
Displays
Digital speedometer 155, 163
Distronic* 263
Maintenance service indicator 422
Messages in the multifunction
display 449
Multifunction display 155Outside temperature 155, 163
Selecting 173
Symbol messages 466
Text messages 451
Vehicle status message 168, 449
Vehicle system settings, Control
system 159, 161, 168
Distance to empty (range), Trip
Computer 184
Distronic* 260
Activating 266
Cleaning system sensor 430
Control system 264
Deactivating 268
Distance warning function* 272
Distance warning function*
activating/deactivating 183
Driving hints 270
Messages in the multifunction
display 453
Sensor cover 430
Warning and indicator lamps 263
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583 Index
Lighter see Cigarette lighter (Depending
on vehicle configuration)
Lighting, Exterior and interior 143
Limp-Home Mode 200, 439, 440
Loading see Vehicle loading
Locator lighting 146, 176
Lock buttons, KEYLESS-GO*
Outside door handle 71
Locking the vehicle see Key
Loss of keys, Mechanical key 120
Loss of keys, SmartKey 120
Loss of keys, SmartKey with
KEYLESS-GO* 120
Loss of Service and Warranty Information
Booklet 549
Low beam headlamps
Messages in the multifunction
display 479
Replacing bulbs 505
Switching on 61, 143
LOW RANGE mode* 201
Messages in the multifunction
display 488
Lubricants 562
Lumbar support 137M
Main dimensions 560
Maintenance 12, 422
Calling up service indicator
display 424
Clearing service indicator
message 423
Maintenance System 422
Resetting service indicator 424
Service indicator message 422
Service term exceeded 423
Maintenance System 422
Manual headlamp mode see Headlamps
Maximum cooling, MAXCOOL* see
Automatic climate control
(3-zone)* 237
Maximum load rating, Tires 417
Maximum loaded vehicle weight,
Tires 417
MB Tex upholstery, Cleaning and
care of 434
Mechanical key 496Memory function* see Seats
Menus see Control system menus
Messages in display see Multifunction
display messages
Microphone, Hands-free 34
Minispare wheel see Spare wheel
Mirrors
Adjusting 51
Auto-dimming rear view
mirrors* 208
Exterior rear view mirror 51
Interior rear view mirror 51, 208
MON 375, 565
Multicontour seat* 138
Multifunction display 155
Changing settings see Control system
menus and Control system sub-
menus
Displaying current gear range 197
Selecting display 173
Selecting language 172
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585 Index
Off-road - 4-ETS 108
Off-road - ABS 102
Off-road - ESP
®106
Off-road driving
Checklist 357, 363
Crossing obstacles 361
Driving instructions for off-road
driving 355
Driving through water 360
Returning 363
Rules 356
Special driving features 356
Steep terrain 358
Off-road driving program (Vehicles without
enhanced off-road package*) 277
Oil level see Engine oil, Checking level
One-touch gearshifting 199
Operating safety 17
Operator’s Manual 10
Ornamental moldings, Cleaning 429
Outside temperature see Displays
Overdue maintenance service term 423
Overhead control panel 34
Oxidation catalyst (diesel engine) 371P
Paintwork code 550
Paintwork, Cleaning 426
Panic alarm 100
Panorama roof, Rear 212
Parcel net
Front passenger footwell 319
Front seat backrests 319
Parking 67, 350
On hills 67
Over things that burn, Potential
consequences 67, 371
Parking brake 59, 67
Lamps, Indicator and warning 437
Messages in the multifunction
display 468
Releasing 59
Parking lamps 505
Messages in the multifunction
display 480
Replacing bulbs 509
Parking position*
Exterior rear view mirrors 182, 209Parktronic* 31, 32, 288
Cleaning system sensors 430
Minimum distance 290
Range 289
Switching on/off 291
System malfunction 292
System sensors 289
System sensors, Cleaning 430
Warning indicators 25, 290
Parts service 548
PASS AIR BAG OFF indicator lamp see
Front passenger front air bag off
indicator lamp
Passenger compartment 370
Fuse box 545
Interior lighting 149
Interior rear view mirror 34
Parcel net in front passenger
footwell 319
Passenger safety see Occupant safety
Pedals 347
Phone see Telephone*
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