engine coolant MERCEDES-BENZ G-CLASS SUV 2015 Owners Manual

COMAND and Internetsee Online and Internet functions
COMAND control panel .....................178
COMAND controller ........................... 179
Combination switch ............................ 92
Compass
Display messages .......................... 148
Connecting a USB device
see also Digital Operator's Man-
ual ................................................. .172
Consumption statistics (on-board
computer) .......................................... 147
Convenience opening feature .......... 100
Coolant (engine)
Checking the level ......................... 208
Display message .................... 148, 155
Filling capacity ............................... 265
Notes ............................................. 264
Temperature (on-board com-
puter) ............................................. 147
Temperature gauge ........................ 146
Warning lamp ................................. 168
Cooling
see Climate control
Cornering light function
Display message ............................ 148
Function/notes ................................ 92
Courtesy lights ................................... .92
Cruise control
Cruise control leve r .......................113
Display message ............................ 148
Driving system ............................... 112
Function/notes ............................ .112
Resuming the stored speed ........... 114
Selecting ........................................ 114
Storing and maintaining current
speed ............................................. 114
Cup holder
Center console .............................. 197
Important safety notes .................. 197
D
Datasee Technical data
Daytime running lamps
Display message ............................ 148 Switching on/off (on-board com-
puter) ............................................. 147
Declarations of conformity ................. 28
DEF
Display message ............................ 148
Delayed switch-off
Exterior lighting (on-board com-
puter) ............................................. 147
Interior lighting .............................. 147
Differential locks
Disengaging ................................... 136
Engaging ........................................ 135
Front axle ...................................... 136
General notes ................................ 134
Rear axle ........................................ 136
Terrain .......................................... .134
Transfer case ................................. 136
Differential locks (display mes-
sage) ................................................... 148
Digital Operator's Manual
Contents .......................................... 24
Installation ....................................... 22
Introduction ..................................... 22
Keyword search ............................... 24
Operating notes ............................... 23
Visual search ................................... 23
Digital speedometer ......................... 147
Display (cleaning instructions) ........212
Display messages
Calling up (on-board com-
puter) ............................................. 148
Driving systems ..................... 148, 156
Engine ................................... 148, 155
General notes ................................ 148
Hiding (on-board computer) ........... 148
Lights ............................................. 148
Safety systems ..................... .148, 149
Service interval displa y.................. 209
SmartKey ....................................... 148
Tires ...................................... 148, 158
Vehicle .................................. 148, 160
Distance display (on-board com- puter) .................................................. 147
Distance recorder ............................. 147
see Odometer
see Trip odometer
Distance warning (warning lamp) .... 169
Index7

Cleaning the cover .........................212
Correct driver's seat position ........... 82
Important safety notes .................... 82
Multicontour seat ............................ 84
Storing settings (memory func-
tion) ................................................. 87
Switching seat heating on/off ......... 85
Switching seat ventilation on/off .... 84
Sensors (cleaning instructions) ....... 211
Service interval display
Displaying a service message (on-board computer) ............................ 210
Service menu (on-board com- puter) ................................................. .147
Service products
Brake fluid ..................................... 264
Coolant (engine) ............................ 264
Engine oil ....................................... 262
Fuel ................................................ 259
Important safety notes .................. 259
Notes ............................................. 259
Refrigerant (air-conditioning sys-
tem) ............................................... 263
Washer fluid ................................... 265
Setting a speed limit
see SPEEDTRONIC
Setting the air distribution ...............100
Setting the airflow ............................ 100
Setting the date/time format
see also Digital Operator's Man-
ual ................................................. .172
Setting the language
see also Digital Operator's Man-
ual ................................................. .172
Setting the time
see also Digital Operator's Man-
ual ................................................. .172
Settings
Factory (on-board computer) ......... 147
Menu overview .............................. 176
On-board computer ....................... 147
SETUP (on-board computer) ............. 147
Shift ranges ....................................... 107
Side impact air bag .............................50
Side marker lamp (display mes- sage) ................................................... 148 Side marker lamps (changingbulbs)
................................................... .94
Side windows
Cleaning ......................................... 211
Important safety informa-
tion .................................................. 77
Opening/closing .............................. 77
Opening/closing (all) ....................... 77
Opening/closing (front )................... 77
Overview .......................................... 77
Troubleshooting ............................... 77
SIRIUS services
see also Digital Operator's Man-
ual .................................................. 172
Ski rack .............................................. 197
Sliding sunroof
Important safety notes .................... 77
Opening/closing .............................. 78
Operating manually .......................... 78
SmartKey
Changing the battery ....................... 74
Changing the programming ............. 73
Checking the battery ....................... 74
Convenience opening feature .......... 77
Display message ............................ 148
Door central locking/unlocking ....... 72
Important safety notes .................... 72
Loss ................................................. 74
Malfunction ...................................... 74
Mechanical key ................................ 73
Overview .......................................... 72
Problem (malfunction) ..................... 74
Starting the engine ........................ 104
SMS
see also Digital Operator's Man-
ual .................................................. 172
Snow chains ...................................... 232
Sockets
Front-passenger footwell ............... 197
Points to observe before use ......... 197
Trunk ............................................. 197
SOS
see mbrace
Spare fuses ........................................ 225
Spare wheel
Mounting ....................................... 250
Notes/data .................................... 256
Spare wheel bracket at the rear .... 215
16Index

Stainless-steel spare hub cap ........ 215
Special seat belt retractor .................. 56
Specialist workshop ............................ 28
Speed, controlling
see Cruise control
Speedometer
In the Instrument cluster ............... 146
Segments ...................................... 146
Selecting the unit of measure-
ment .............................................. 147
see Instrument cluster
SPEEDTRONIC
Display message ............................ 148
Selecting ........................................ 116
Variabl e......................................... 115
Standing lamps
Display message ............................ 148
Switching on/of f.............................. 91
Starting the engine
Important safety notes .................. 104
Steering (display message) ...... 148, 160
Steering wheel
Adjusting (electrically) ..................... 87
Buttons (on-board computer) ......... 146
Important safety notes .................... 86
Paddle shifters ............................... 107
Steering wheel heating .................... 87
Storing settings (memory func-
tion) ................................................. 87
Steering wheel (cleaning instruc-
tions) .................................................. 212
Steering wheel paddle shifters ........ 107
Stopwatch (RACETIMER) ................... 147
Stowage areas ................................... 193
Stowage compartments
Armrest (under) ............................. 193
Center console .............................. 193
Cup holders ................................... 197
Display message) ........................... 148
Door stowage compartment .......... 193
Glove box ....................................... 193
Important safety information ......... 193
Summer tires ..................................... 232
Surround lighting (on-board com- puter) .................................................. 147
Switching air-recirculation mode
on/off ................................................. 100 Switching off the alarm (ATA)
............ 69
T
Tachometer........................................ 146
Tail lamps
Display message ............................ 148
see Lights
Tank content
Fuel gaug e..................................... 146
Technical data
Capacities ...................................... 259
Tires ............................................... 254
Tires/wheels ................................. 254
Trailer load s................................... 269
Vehicle data ................................... 266
Wheels ........................................... 254
TELEAID
Call priority .................................... 201
Emergency call .............................. 198
Important safety notes .................. 197
MB info call button ........................ 200
Roadside Assistance button .......... 200
Self-test ......................................... 198
System .......................................... 198
Telephone
Accepting a call ............................. 147
Display message ............................ 148
Number from the phone book ........ 147
Redialing ........................................ 147
Rejecting/ending a call ................. 147
see also Digital Operator's Man-ual.................................................. 172
Telephone compartment .................. 193
Temperature
Coolant .......................................... 146
Coolant (on-board computer) ......... 147
Engine oil (on-board computer) ...... 147
Outside temperature ...................... 146
Theft deterrent systems
ATA (Anti-Theft Alarm system )......... 69
Immobilizer ...................................... 68
Tilt/sliding sunroof
see Sliding sunroof
Time
see separate operating instructions
Timing (RACETIMER) ......................... 147
Index17

Warning and indicator lamps
FunctionPage
:LLow-beam head-
lamps
91
;÷ ESP®165
=K
High-beam head-
lamps
92
?J Brakes (yellow)162
A·Distance warning169
B#! Turn signals92
ChTire pressure monitor170
D6 Restraint system42
EüSeat belt161
FunctionPage
F?Coolant168
GRRear fog lamp91
HOFront fog lamps91
I;Check Engine~
J8 Reserve fuel~
KåESP®
OFF165
L! ABS163
MBrakes (red)
$(USA only)
J(Canada only)162
34Instrument cluster
At a glance

stopping and backing up in a traffic-free location.
R Before driving, check:
- Trailer tow hitch
- Safety switch for braked trailers
- Safety chains
- Electrical connections
- Lights
- Wheels
R Adjust the exterior mirrors to provide an
unobstructed view of the rear section of the
trailer.
R If the trailer features electronically control-
led brakes, pull away the vehicle/trailer
combination carefully, manually brake
using the brake controller, and check the
brakes for correct function.
R Secure any objects on the trailer to prevent
the cargo from slipping when the vehicle is
in motion.
R If you couple up a trailer, regularly check
the cargo for secure fastening and make
sure that the trailer lamps and (if applica-
ble) the trailer brakes are functioning cor-rectly.
R Bear in mind that the handling will be less
stable when towing a trailer than when driv-
ing without one. Avoid sudden steeringmovements.
R The vehicle/trailer combination is heavier,
accelerates more slowly, has a decreased
gradient climbing capability and a longer
braking distance.
It is more susceptible to side winds and
requires more careful steering.
R If possible, avoid abrupt braking. Depress
the brake pedal moderately at first, so that
the trailer can activate its own brakes. Thenincrease the pressure on the brake pedal.
R If the automatic transmission continues to
shift back and forth between two gears
when driving up or downhill, restrict the
shift range. Select shift range 4, 3, 2,or1.
A lower gear and lower speed reduce the
risk of engine failure. R
When driving downhill, shift to a lower gear
to utilize the engine's braking effect.
Avoid continuous brake application as this
may overheat the vehicle brakes and, if
installed, the trailer brakes.
R If the coolant temperature increases dra-
matically while the air-conditioning system
is switched on, switch off the air-condition-
ing system.
Coolant heat can additionally be dissipated
by opening the windows and by setting the
blower fan and the interior temperature tomaximum.
R When overtaking, pay particular attention
to the extended length of your vehicle/
trailer combination.
Due to the length of your vehicle/trailer
combination, you will have to travel an addi-
tional distance beyond the vehicle you are
overtaking before returning to the previous lane.
Decoupling a trailer
!
Do not disconnect a trailer with an
engaged overrun brake. Otherwise, your
vehicle could be damaged by the rebound- ing of the overrun brake.
X Make sure that the automatic transmission
is set to position P.
X Apply the parking brake.
X Start the engine.
X Close all doors, including the rear door.
X Apply the trailer's parking brake.
X Detach the trailer cable and decouple thetrailer.
X Switch off the engine.
Permissible trailer and drawbar loads
Weight specifications
The gross trailer weight is calculated by add-
ing the weight of the trailer to the weight of
142Towing a trailer
Driving and parking

Engine
Display messagesPossible causes/consequences andMSolutions
?
Coolant Too Hot
Stop Vehicle
Switch Engine Off
The coolant is too hot.
A warning tone also sounds.
GWARNING
Do not drive when your engine is overheated. This can cause some
fluids which may have leaked into the engine compartment to
catch fire.
Steam from the overheated engine can also cause serious burns
which can occur just by opening the hood.
There is a risk of injury. X Pull over and stop the vehicle safely and switch off the engine,
paying attention to road and traffic conditions.
X Secure the vehicle against rolling away ( Ypage 110).
X Leave the vehicle and keep a safe distance from the vehicle until
the engine has cooled down.
X Make sure that the air supply to the engine radiator is not
blocked, e.g. by snow, slush or ice.
X Do not start the engine again until the display message goes out
and the coolant temperature is below 248 ‡ (120 †). Other-
wise, the engine could be damaged.
X Pay attention to the coolant temperature display.
X If the temperature increases again, visit a qualified specialist
workshop immediately.
Under normal operating conditions and with the specified coolant
level, the coolant temperature may rise to 248 ‡ (120 †).
The poly-V-belt may have torn.
X Pull over and stop the vehicle safely and switch off the engine,
paying attention to road and traffic conditions.
X Check the poly-V-belt.
If the poly-V-belt is torn:
!Do not continue driving. The engine could otherwise overheat.
X Consult a qualified specialist workshop.
If the poly-V-belt is not damaged:
X Wait until the display message disappears before restarting the
engine. Otherwise, the engine could be damaged.
X Pay attention to the coolant temperature display.
X Visit a qualified specialist workshop.
Display messages155
On-board computer and displays
Z

Engine
ProblemPossible causes/consequences andMSolutions
?
The red coolant warn-
ing lamp comes on
while the engine is run-
ning. A warning tone
also sounds.The coolant temperature has exceeded 248 ‡ (120 †). The air-
flow to the engine radiator may be blocked or the coolant level may
be too low.
GWARNING
The engine is not being cooled sufficiently and may be damaged.
Do not drive when your engine is overheated. This can cause some
fluids which may have leaked into the engine compartment to
catch fire.
Steam from the overheated engine can also cause serious burns
which can occur just by opening the hood.
There is a risk of injury. X Observe the additional display messages in the multifunction display.
X Pull over and stop the vehicle safely and switch off the engine,
paying attention to road and traffic conditions.
X Secure the vehicle against rolling away ( Ypage 110).
X Leave the vehicle and keep a safe distance from the vehicle until
the engine has cooled down.
X Check the coolant level and add coolant, observing the warning
notes ( Ypage 208).
X If you need to add coolant more often than usual, have the
engine coolant system checked.
X Make sure that the air supply to the engine radiator is not
blocked, e.g. by snow, slush or ice.
X At coolant temperatures below 248 ‡ (120 †), drive to the
nearest qualified specialist workshop.
X Avoid subjecting the engine to heavy loads, e.g. driving in moun-
tainous terrain, and stop-start driving.
168Warning and indicator lamps in the instrument cluster
On-board computer and displays

Additional service products
Checking coolant level
GWARNING
Certain components in the engine compart-
ment, such as the engine, radiator and parts
of the exhaust system, can become very hot.
Working in the engine compartment poses a
risk of injury.
Where possible, let the engine cool down and touch only the components described in the
following.
GWARNING
The engine cooling system is pressurized, par-ticularly when the engine is warm. When
opening the cap, you could be scalded by hotcoolant spraying out. There is a risk of injury.
Let the engine cool down before opening the
cap. Wear eye and hand protection when
opening the cap. Open the cap slowly half a
turn to allow pressure to escape.
X Park the vehicle on a level surface.
Only check the coolant level when the vehi-
cle is on a level surface and the engine has
cooled down.
X Turn the SmartKey to position 2
( Y page 103) in the ignition lock.
X Check the coolant temperature display in
the instrument cluster.
The coolant temperature must be below
158 ‡ (70 †). X
Slow ly turn cap :half a turn counter-
clockwise and allow excess pressure to
escape.
X Turn cap :further counter-clockwise and
remove it.
If the coolant is at the level of marker bar =
in the filler neck when cold, there is enough coolant in coolant expansion tank ;.
If the coolant level is approximately 0.6 in
(1.5 cm) above marker bar =in the filler
neck when warm, there is enough coolant
in coolant expansion tank ;.
X If necessary, add coolant that has been tes-
ted and approved by Mercedes-Benz.
X Replace cap :and turn it clockwise as far
as it will go.
For further information on coolant, see( Y page 264).
Adding washer fluid to the windshield
washer system/headlamp cleaning
system
GWARNING
Certain components in the engine compart-
ment, such as the engine, radiator and parts
of the exhaust system, can become very hot.
Working in the engine compartment poses a
risk of injury.
Where possible, let the engine cool down and
touch only the components described in the
following.
GWARNING
Windshield washer concentrate could ignite if it comes into contact with hot engine compo-
nents or the exhaust system. There is a risk of
fire and injury.
Make sure that no windshield washer con-
centrate is spilled next to the filler neck.
208Engine compartment
Maintenance and care

Vehicle identification number (VIN)
:VIN (on the lower edge of the windshield)
Engine number
Example: G 550 :
Emissions control information plate,
including the certification of both federal
and Californian emissions standards
;Engine number (stamped into the crank-
case)
Service products and filling capaci-
ties
Important safety notes
GWARNING
Service products may be poisonous and haz-
ardous to health. There is a risk of injury.
Comply with instructions on the use, storage
and disposal of service products on the labelsof the respective original containers. Always
store service products sealed in their original
containers. Always keep service products out of the reach of children.
HEnvironmental note
Dispose of service products in an environ-
mentally responsible manner.
Service products include the following:
R Fuels
R Lubricants (e.g. engine oil, transmission oil)
R Coolant
R Brake fluid
R Windshield washer fluid
R Climate control system refrigerant
Components and service products must be
matched. Only use products recommended
by Mercedes-Benz. Damage which is caused
by the use of products which have not been
recommended is not covered by the
Mercedes-Benz warranty or goodwill ges-
tures. They are listed in this Mercedes-Benz
Operator's Manual in the appropriate section.
Information on tested and approved products can be obtained at an authorized Mercedes-
Benz Center or on the Internet at http://
bevo.mercedes-benz.com .
You can recognize service products approved
by Mercedes-Benz by the following inscrip-
tion on the containers:
R MB-Freigabe (e.g. MB-Freigabe 229.51)
R MB Approval (e.g. MB Approval 229.51)
Other designations or recommendations indi- cate a level of quality or a specification in
accordance with an MB Sheet number (e.g.
MB 229.5). They have not necessarily been
approved by Mercedes-Benz.
Other identifications, for example:
R 0 W-30
R 5 W-30
R 5 W-40
Service products and filling capacities259
Technical data
Z

Brake fluid
GWARNING
The brake fluid constantly absorbs moisture
from the air. This lowers the boiling point of
the brake fluid. If the boiling point of the brakefluid is too low, vapor pockets may form in the brake system when the brakes are applied
hard. This would impair braking efficiency.
There is a risk of an accident.
You should have the brake fluid renewed at
the specified intervals.
When handling brake fluid, observe the
important safety notes on service products( Y page 259).
The brake fluid change intervals can be found
in the Maintenance Booklet.
Only use brake fluid approved by Mercedes-
Benz according to MB Approval 331.0.
Information about approved brake fluid can
be obtained at any qualified specialist work-
shop or on the Internet at
http://bevo.mercedes-benz.co m.
iHave the brake fluid regularly replaced at
a qualified specialist workshop and the
replacement confirmed in the Maintenance Booklet.
Coolant
Important safety notes
GWARNING
If antifreeze comes into contact with hot com- ponents in the engine compartment, it may
ignite. There is a risk of fire and injury.
Let the engine cool down before you add anti-
freeze. Make sure that antifreeze is not spilled
next to the filler neck. Thoroughly clean the
antifreeze from components before starting
the engine.
!Only add coolant that has been premixed
with the desired antifreeze protection. You
could otherwise damage the engine. Further information on coolants can be
found in the Mercedes-Benz Specifications
for Service Products, MB BeVo 310.1, e.g.
on the Internet at
http://bevo.mercedes-benz.com. Or con-
tact a qualified specialist workshop.
!Always use a suitable coolant mixture,
even in countries where high temperatures prevail.
Otherwise, the engine cooling system is not
sufficiently protected from corrosion and
overheating.
iHave the coolant regularly replaced at a
qualified specialist workshop and the
replacement confirmed in the Maintenance Booklet.
Comply with the important safety precautions for service products when handling coolant( Y page 259).
The coolant is a mixture of water and anti-
freeze/corrosion inhibitor. It performs the
following tasks:
R corrosion protection
R antifreeze protection
R raising the boiling point
If the coolant has antifreeze protection down to -35 ‡(-37 †), the boiling point of the cool-
ant in the pressurized system is approx-
imately 266 ‡ (130 †).
The antifreeze/corrosion inhibitor concentra- tion in the engine cooling system should: R be at least 50%. This will protect the engine
cooling system against freezing down to
approximately -35 ‡(-37 †).
R not exceed 55% (antifreeze protectiondo wn to -49 ‡ [-45 †]). Otherwise, heat
will not be dissipated as effectively.
Mercedes-Benz recommends an antifreeze/
corrosion inhibitor in accordance with MB
Specifications for Service Products 310.1.
iWhen the vehicle is first delivered, it is fil-
led with a coolant mixture that ensures
adequate antifreeze and corrosion protec-
tion.
264Service products and filling capacities
Technical data