2008 MERCEDES-BENZ G500 coolant temperature

Contents
Safety and Security........................... 67
Occupant safety................................... 68 Air bags .......................................... 70
Seat belts ....................................... 74
Children in the vehicle.................... 77
Blocking of rear door window
operation ........................................ 85
Panic alarm .......................................... 86 Activating ....................................... 86
Deactivating ................................... 86
Driving safety systems ... ...................... 87
ABS ................................................ 87
BAS ................................................ 89
4-ETS .............................................. 90
EBB................................................. 91
ESP®.............................................. 91
Anti-theft systems....................... ......... 95
Immobilizer..................................... 95
Anti-theft alarm .............................. 95
Tow-away alarm ............................. 97Controls in detail ............................... 99
Locking and unlocking ....................... 100 SmartKey ..................................... 100
Checking batteries in the
SmartKey ..................................... 103
Loss of the SmartKey ................... 103
Opening the doors from the
inside ........................................... 104
Tailgate ........................................ 105
Automatic central locking ............ 106
Locking and unlocking from the
inside ........................................... 107
Seats ................................................. 108 Removing and installing front
seat head restraints ..................... 108
Multicontour seat* ....................... 109
Rear seats .................................... 110
Seat heating ................................. 112
Memory function ............................... 114 Storing positions into memory ..... 115
Recalling positions from memory . 115
Storing exterior rear view mirror
parking position (Canada only) ..... 116 Lighting ............................................. 117
Exterior lamp switch .................... 117
Combination switch ..................... 122
Corner-illuminating front fog
lamps ........................................... 122
Hazard warning flasher ................ 124
Interior lighting in the front .......... 125
Rear interior lamps ...................... 126
Cargo compartment lamps .......... 127
Door entry lamps ......................... 129
Instrument cluster ............................. 130 Adjusting instrument cluster
illumination .................................. 130
Coolant temperature gauge ......... 131
Resetting trip odometer ............... 131
Tachometer.................................. 132
Outside temperature indicator ..... 132
Control system ............ ...................... 133
Multifunction display.................... 133
Multifunction steering wheel........ 134
Menus .......................................... 136
Standard display menu ................ 140
Audio menu.................................. 141
NAV menu .................................... 144
Vehicle status message memory
menu............................................ 144
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Contents
Operation......................................... 243
The first 1 000 miles (1 500 km) ......... 244
Driving instructions ............................ 245 Drive sensibly – save fuel ............. 245
Drinking and driving ..................... 245
Pedals .......................................... 245
Power assistance ......................... 246
Brakes .......................................... 246
Driving off..................................... 247
Parking ......................................... 248
Tires ............................................. 248
Hydroplaning ................................ 249
Tire traction .................................. 249
Tire speed rating .......................... 250
Winter driving instructions ........... 251
Standing water ............................. 252
Passenger compartment .............. 252
Off-road driving ............................ 253
Driving abroad .............................. 261
Control and operation of radio
transmitters.................................. 261
Catalytic converter ....................... 262
Emission control........................... 263
Coolant temperature .................... 263 At the gas station .............................. 264
Refueling ...................................... 264
Check regularly and before a
long trip........................................ 265
Engine compartment ......................... 267 Hood ............................................ 267
Engine oil ..................................... 269
Transmission fluid level ................ 273
Coolant level ................................ 274
Windshield/rear window washer
system and headlamp
cleaning system ........................... 275
Tires and wheels ................................ 277 Important guidelines .................... 277
Tire care and maintenance ........... 278
Direction of rotation ..................... 280
Loading the vehicle ...................... 280
Recommended tire inflation
pressure ....................................... 286
Checking tire inflation pressure ... 288
Tire labeling.................................. 294
Load identification ....................... 298
DOT, Tire Identification Number
(TIN) ............................................. 299
Maximum tire load ....................... 300
Maximum tire inflation pressure .. 301 Uniform Tire Quality Grading
Standards (U.S. vehicles) ............. 302
Tire ply material ........................... 304
Tire and loading terminology........ 304
Rotating tires ............................... 307
Winter driving .................................... 309 Winter tires .................................. 309
Block heater (Canada only) .......... 310
Snow chains................................. 310
Maintenance...................................... 311 Maintenance service indicator
message ...................................... 311
Calling up the maintenance
service indicator display .............. 313
Resetting the maintenance
service indicator .......................... 313
Vehicle care....................................... 314 Cleaning and care of the vehicle .. 314
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27
At a glance
Instrument cluster
ItemPage
1Speedometer with:
v
Electronic Stability Pro-
gram (ESP®) warning
lamp
91,
330
; Brake warning lamp,
USA only55,
326
3 Brake warning lamp,
Canada only55,
326
B Low beam headlamp in-
dicator lamp56,
118
H Low tire pres-
sure/TPMS malfunc-
tion telltale
1
1Depending on vehicle production date.
333
2LLeft turn signal
indicator lamp57
3Multifunction display with:133

Trip odometer131,
140
ItemPage

Main odometer140

Transfer case indicator170

Gear selector lever
position indicator164

Gear range indicator167

Status indicator:

Digital speedometer133

Outside temperature140

Clock133
4K Right turn signal
indicator lamp 57
5Tachometer with:
-Antilock Brake System
(ABS) indicator lamp87,
324
< Seat belt telltale74,
331
1 Supplemental
Restraint System
(SRS) indicator lamp68,
332
ItemPage
ú Engine malfunction
indicator lamp,
USA only328
±Engine malfunction
indicator lamp,
Canada only328
AHigh beam headlamp
indicator lamp57,
122
6Fuel gauge with:
Fuel tank reserve warning
lamp331
4 Fuel filler flap indica-
tor: The fuel filler flap
is located on the rear
right-hand side264
7Coolant temperature gauge131
8Reset button for:

Resetting trip odometer131

Resetting all settings146

Adjusting instrument
cluster illumination130
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61
Getting started
Driving
Problems while driving
The engine runs erratically and misfires

An ignition cable may be damaged.

The engine electronics may not be
operating properly.

Unburned gasoline may have entered
the catalytic converter and damaged it.
Give very little gas.
Have the problem repaired at 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
engine. Allow engine and coolant to
cool off.
Check the coolant level and add
coolant if necessary (
page 274).
In case of accident
If the vehicle is leaking fuel:
Do not start the engine under any
circumstances.
Notify local fire and/or police
authorities.
If the extent of the damage cannot be
determined:
Contact an authoriz ed Mercedes-Benz
Light Truck Center or call Roadside
Assistance.
If no damage can be determined on the

major assemblies

fuel system

engine mount:
Start the engine in the usual manner.
iExcessive coolant temperatures trigger a
warning message in the multifunction display
(
page 346).
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131
Controls in detail
Instrument cluster
Coolant temperature gauge
The coolant temperat
ure gauge is on the
left side in the instrument cluster
(
page 26).
Resetting trip odometer
Make sure you are viewing the
standard display (
page 140).
If it is not displayed, press button è
or ÿ on the multifunction steering
wheel (
page 134) repeatedly until
the standard displa y appears in the
multifunction display.
Press and hold reset button 1
(
page 130) until the trip odometer is
reset.
Warning!G

Driving when your engine is overheated
can cause some fluids which may have
leaked into the engine compartment to
catch fire. You could be seriously
burned.

Steam from an overheated engine can
cause serious burns which can occur
just by opening the hood. Stay away
from the engine if you see or hear steam
coming from it.
Stop the vehicle in a safe location away from
other traffic. Turn off the engine, get out of
the vehicle and do not stand near the vehicle
until the engine has cooled down.
!Excessive coolant temperature triggers a
warning message in the multifunction display
(
page 346).
The engine should not be operated with the
coolant temperature above 248°F (120°C).
Doing so may cause serious engine damage
which is not covered by the Mercedes-Benz
Limited Warranty.
iDuring severe operating conditions, e.g.
stop-and-go traffic, the coolant temperature may
rise close to 248°F (120°C).
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190 Controls in detail
Climate control
Activating
Moist air can fog up the windows. You can
dehumidify the air with the air condition-
ing.
Press button9 (page 183) once
more.
The indicator lamp on the button
comes on.
The air conditioning uses the refrigerant
R134a. This refrigerant is free of CFCs
which are harmful to the ozone layer.
Residual heat and ventilation
With the engine switched off, it is possible
to continue to heat or ventilate the interior
for up to 30 minutes. This feature makes
use of the residual he at produced by the
engine. Activating
Turn the SmartKey in the starter switch
to position
0 or 1 (
page 39).
or
Remove the SmartKey from the starter
switch.
Press button 9 (page 183).
The indicator lamp on the button
comes on.
Deactivating
Press button 9 (page 183) once
more.
The indicator lamp on the button goes
out.!If the air conditioning cannot be turned on
again, this indicates that the air conditioning is
losing refrigerant. The compressor has turned
itself off.
Have the air conditioning checked at the nearest
authorized Mercedes-Benz Light Truck Center.
iHow long the system will provide heating
depends on

the coolant temperature

the battery voltage
Regardless of the temperature and air volume
set on the climate control panel, an interior
temperature is aimed at by 72°F (22°C) and the
blower runs on low speed to protect the vehicle
battery.
iThe residual heat is automatically turned off:

when the ignition is switched on

after about 30 minutes

if the coolant temperature is too low

if the battery voltage drops
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263
Operation
Driving instructions
Emission control
Certain engine systems serve to keep the
toxic components of the exhaust gases
within permissible limits required by law.
These systems, of course, will function
properly only when maintained strictly
according to factory specifications. Any
adjustments on the engine should,
therefore, be carried out only by qualified
Mercedes-Benz Light Truck Center autho-
rized technicians.
Engine adjustments should not be altered
in any way. Moreover, the specified service
jobs must be carried out regularly
according to Mercedes-Benz servicing
requirements. For details refer to the
Maintenance Booklet.
Coolant temperature
During severe operating conditions,
e.g. stop-and-go traffic, the coolant tem-
perature may rise close to approximately
248°F (120°C).
The engine should not be operated with
the coolant temperature above 248°F
(120°C). Doing so may cause serious
engine damage which is not covered by the
Mercedes-Benz Limited Warranty.
Warning!G
Inhalation of exhaust gas is hazardous to
your health. All exhaust gas contains carbon
monoxide (CO), and inhaling it can cause
unconsciousness an
d possible death.
Do not run the engine in confined areas
(such as a garage) which are not properly
ventilated. If you think that exhaust gas
fumes are entering the vehicle while driving,
have the cause determ ined and corrected
immediately. If you mu st drive under these
conditions, drive only with at least one
window fully open at all times.
iExcessive coolant temperatures trigger a
warning message in the multifunction display
(
page 346).
Warning!G

Driving when your engine is overheated
can cause some fluids, which may have
leaked into the engine compartment to
catch fire. You could be seriously
burned.

Steam from an overheated engine can
cause serious burns which can occur
just by opening th e hood. Stay away
from the engine if you see or hear steam
coming from it.
Turn off the engine, get out of the vehicle
and do not stand near the vehicle until the
engine has cooled down.
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274 Operation
Engine compartment
Coolant level
The engine coolant is a mixture of water
and anticorrosion/antifreeze.
When checking the coolant level,

the vehicle must be parked on level
ground

the coolant temperature must be be-
low 158°F (70°C)The coolant expansion tank is located on
the passenger side of the engine compart-
ment.
1 Cap
Warning!G
In order to avoid any potentially serious
burns:

Use extreme caution when opening the
hood if there are any signs of steam or
coolant leaking from the cooling system,
or if the coolant temperature display
indicates that the coolant is overheated.

Do not remove pressure cap on coolant
reservoir if coolant temperature is
above 158°F (70°C). Allow engine to
cool down before removing cap. The
coolant reservoir contains hot fluid and
is under pressure.

Using a rag, slowly open the cap
approximately 1/2turn to relieve excess
pressure. If opened immediately, scald-
ing hot fluid and steam will be blown out
under pressure.

Do not spill antifreeze on hot engine
parts. Antifreeze contains ethylene
glycol which may burn if it comes into
contact with hot engine parts.
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