2003 MERCEDES-BENZ G500 coolant level

267 Practical hints
What to do if …
G
VISIT WORKSHOP!
DISPLAY FAULTY
The instrument cluster display is
malfunctioning.
Some systems themselves may also
have failed.

Continue driving with added
caution.

Visit an authorized Mer-
cedes-Benz Light Truck Center
as soon as possible.
2
±
VISIT WORKSHOP!
DISPLAY FAULTY
Certain electronic systems are un-
able to relay information to the con-
trol system. The following systems
may have failed:

Coolant temperature display


Tachometer


Cruise control display

Have the electronic systems
checked by an authorized
Mercedes-Benz Light Truck
Center.
2
W
WASHER FLUID
CHECK LEVEL!
The fluid level has dropped to about 1/3 of total reservoir capacity.

Add washer fluid
(page 321).
3
Display
Possible cause
Suggested solution
Category

319 Technical data
Fuels, coolants, lubricants etc.
Gasoline additives
A major concern among engine manufac-
turers is carbon build-up caused by gaso-
line. Mercedes-Benz recommends only the
use of quality gasoline containing additives
that prevent the build up of carbon depos-
its.
After an extended period of using fuels
without such additives, carbon deposits
can build up especially on the intake valves
and in the combustion area, leading to en-
gine performance problems such as:

Warm-up hesitation


Unstable idle


Knocking/pinging


Misfire


Power loss
Do not blend other specific fuel additives
with fuel. This only results in unnecessary
cost and may be harmful to the engine op-
eration.Damage or malfunctions resulting from
poor fuel quality or from blending specific
fuel additives are not covered by the
Mercedes-Benz Limited Warranty.
Coolants
The engine coolant is a mixture of water
and anticorrosion / antifreeze, which pro-
vides:

Corrosion protection


Freeze protection


Boiling protection (by increasing the
boiling point)
The cooling system was filled at the factory
with a coolant providing freeze protection
to approximately -35°F (-37°C) and corro-
sion protection.
If the antifreeze mixture is effective to
-22°F (-30°C), the boiling point of the cool-
ant in the pressurized cooling system is
reached at approximately 266°F (130°C).The coolant solution must be used year
round to provide the necessary corrosion
protection and increase in the boil-over
protection. You should have it replaced
every 3 years.
To provide important corrosion protection,
the solution must be at least 45% anticor-
rosion/antifreeze (equivalent to freeze
protection to approx. - 22°F [-30°C]).
If you use a solution that is more than 55%
anticorrosion/antifreeze (freeze protec-
tion to approx. - 49°F [-45°C]), the engine
temperature will increase due to the lower
heat transfer capability of the solution.
Therefore, do not use more than this
amount of anticorrosion/antifreeze.
If the coolant level is low, water and MB
anticorrosion /antifreeze should be used
to bring it up to the proper level (have cool-
ing system checked for signs of leakage).
Please make sure that the mixture is in ac-
cordance with label instructions.
The water in the cooling system must meet
minimum requirements, which are usually
satisfied by normal drinking water. If you

334 IndexCHECK ENGINE malfunction indicator
lamp 243
Checking
Coolant level 215, 220
Oil level 215, 217, 218
Checklist
Off-road driving 205
Child safety 63
Infant and child restraint systems 54,
60, 63
LATCH child seat mounts 68
Child safety switch see Blocking of rear
door window operation 69
Cigarette lighter 181
Cleaning
Cup holder 235
Gear selector lever 235
Hard plastic trim items 236
Headlamps 148
Headliner 236
Illuminated door sill panels 236
Instrument cluster 235
Leather upholstery 236
Light alloy wheels 235
MB Tex upholstery 236
Plastic and rubber parts 236Rear Park Assist sensors* 234
Seat belts 236
Steering wheel 235
Windows 235
Windshield 47
Wiper blades 235
Climate control 150
Adjusting 153
Defogging windshield 153
Defrosting 154
Rear window defroster 155
Setting the temperature 152
Clock 25
Closing
Glove box 176
Hood 217
Side windows 158
Sliding/pop-up roof 160, 276
Sliding/pop-up roof
with SmartKey 161
Tailgate 88
Windows 158
Windows with SmartKey 159
Closing sliding/pop-up roof
In an emergency 276
Cockpit 22, 325Cockpit management and data system
(COMAND) 325
COMAND 325
COMAND see separate operating
instructions
Combination switch 23, 103
High beam flasher 46, 103
Turn signals 46
Windshield wipers 47
Consumer information 322
Control and operation of
radio transmitters 210
Control system 111, 325
AUDIO menu 116
Convenience submenu 128
Display digital speedometer 116
Functions 112, 115
Instrument cluster submenu 122
Lighting submenu 124
Malfunction memory menu 118
Menus 114, 115, 327
Multifunction display 111
Multifunction steering wheel 112
NAVI menu 118
Selecting radio system 117
Settings menu 119

335 Index
Standard display menu 116
Submenus 113, 115
TEL menu 132
Trip computer menu 130
Vehicle submenu 127
Convenience feature 159
Convenience submenu 128
Activating easy-entry/exit feature 128
Setting key dependency 129
Setting parking position for exterior
rear view mirror 130
Coolant 220, 319
Adding 221
Anticorrosion/antifreeze quantity 319
Capacities 316
Checking level 220
Messages in display 251, 252
Temperature 212
Temperature display 108
Warning lamp 251
Coolant level
Checking 215, 220
Crossing obstacles 208
Cruise control 162, 326
Canceling 163
Driving downhill 163Driving uphill 163
Fine adjustment 164
Saving current speed 163
Setting 164
Setting speed 164
Cruise control lever 162
Cup holder
Cleaning 235
In rear passenger footwell 179
Cup holders 178
In front passenger footwell 178
Next to the armrest 178
Customer Assistance Center (CAC) 325
D
Daytime running lamp mode 102
Setting 124
Deactivating
Air conditioning (cooling) 157
Air recirculation mode 154
Alarm 80
Anti-theft alarm system 80
Central locking (control system) 128
Cruise control 163
Defrost 154
ESP 76
Exterior lamps 101Exterior lamps delayed switch-off 125
Front fog lamps 125
Hazard warning flasher 104
Headlamps 51
Immobilizer 79
Interior lighting delayed switch-off 126
Rear window defroster 155
Seat heater, front 95
Seat heater, rear 96
Tow-away alarm 81
Deep water see Standing water 203
Defogging
Windshield 153
Defrosting 154
Delayed switch-off
Exterior lamps 125
Interior lighting 126
Dialing
A number (telephone) 133
Differential locks 143, 326
Switching off 146
Switching on 145
Difficulties
While driving see Problems while
driving 49
With starting 44

342 IndexMenus 112
AUDIO 116
Control system 327
In control system 114, 115
Malfunction memory 118
NAVI 118
Settings menu 119
Standard display 116
Submenus 113
TEL 132
Trip computer 130
Middle tunnel
Fuse box in 305
Miles/kilometers in speedometer
Setting 122
Mirrors
Activating exterior rear view mirror
parking position 148
Adjusting 38
Automatic antiglare for rear view mirror
147
Exterior rear view mirror 38
Exterior rear view mirror parking posi-
tions 130
Inside rear view mirror 38Storing exterior rear view mirror park-
ing position 99
MON 215
MON (Motor Octane Number) 327
Monitoring reach
Rear Park Assist* 166
Mph or km/h in speedometer 122
Multicontour seat* 94
Multifunction display 111, 327
Selecting language 123
Standard display 115
Multifunction display messages
ABS 247
BAS 248
Battery 266
Brake fluid 250
Brake pads 250
Check engine 243
Coolant 251, 252
Display 267
Doors 254
Engine 243
Engine oil level 254
ESP 257
Fuel reserve tank 263
Hood 258Key 259
Lamps 259, 261
Parking brake 263
Tailgate 266
Tele Aid 266
Telephone* 258
Washer fluid 267
Multifunction steering wheel 26, 112
Buttons 112
N
Navigation system
Operating 118
See separate COMAND operating in-
structions
Night security illumination 102
Setting 125
O
Occupant safety 54
Airbags 55
Children in the vehicle 63
Fastening the seat belt 40
Infant and child restraint systems 63
LATCH child seat mounts 68
Seat belts 40, 58
Odometer, main 25