2015 MERCEDES-BENZ G-Class coolant level

Notes/how to use .........................2
53
Opening and closing ..................... .253
Overview ........................................ 253
Cargo compartment enlargement
Important safety notes .................. 250
Cargo tie down rings ......................... 253
CD player/CD changer (on-board
computer) .......................................... 203
Center console
Overview .......................................... 34
Upper section .................................. 34
Central locking
Automatic locking (on-board com-
puter) ............................................. 208
Locking/unlocking (SmartKey) ....... .68
Changing bulbs
Reversing lamps ............................ 113
Side marker lamps ........................ .112
Turn signals (front) ......................... 111
Changing gears .................................. 142
Checklist
After driving off-roa d...................... 159
Before driving off-road ................... 159
Child seat
BabySmart™ air bag deactivation
system ............................................. 56
Forward-facing restraint system ...... 58
LATCH-type (ISOFIX) child seat
anchors ............................................ 55
On the front-passenger sea t............ 58
Problem (malfunction) ..................... 59
Rearward-facing restraint system .... 58
Top Tether ....................................... 55
Child-proof locks
Important safety notes .................... 59
Rear doors ....................................... 60
Children
Restraint systems ............................ 54
Special seat belt retractor ............... 53
Chrome parts (cleaning instruc-
tions) .................................................. 285
Cigarette lighter ................................ 256
Climate control
Controlling automaticall y............... 124
Cooling with air dehumidification .. 122
Defrosting the window s................. 126
Defrosting the windshield .............. 125 Dual-zone automatic climate con-
trol ................................................. 119
Important safety notes .................. 118
Indicator lamp ................................ 124
Maximum cooling .......................... 125
Notes on using dual-zone auto-
matic climate control ..................... 120
Overview of systems ...................... 118
Problem with the rear window
defroster ........................................ 127
Problems with "cooling with air
dehumidification" ........................... 124
Refrigerant ..................................... 341
Refrigerant filling capacity ............. 342
Setting the air distribution ............. 124
Setting the air vents ...................... 128
Setting the airflow ......................... 124
Setting the temperature ................ 124
Switching air-recirculation mode
on/of f............................................ 127
Switching on/of f........................... 121
Switching residual heat on/off ...... 127
Switching the rear window
defroster on/of f............................ 126
Switching the ZONE function on/
off .................................................. 125
Windshield defroster ...................... 126
Climate control system
Deactivating/activating ................. 136
Cockpit
Overview .......................................... 30
see Instrument cluster
COMAND
see separate operating instructions
Combination switch .......................... 103
Consumption statistics (on-board
computer) .......................................... 200
Convenience opening feature
see Side windows
Coolant (engine)
Checking the level ......................... 278
Display message ............................ 221
Filling capacity ............................... 343
Notes ............................................. 342
Temperature (on-board com-
puter) ............................................. 209
Temperature gaug e........................ 197
Warning lamp ................................. 243 6
Index

Problems with the rear window
defroster
If the indicator lamp in the
ªrear window
defroster button flashes, the on-board volt-
age is too low. The rear window defroster has
deactivated prematurely or cannot be activa-
ted.
X Switch off any consumers that are not
required, e.g. reading lamps or interior
lighting.
When the battery is sufficiently charged,
the rear window defroster is activated
again automatically. Activating/deactivating air-recircula-
tion mode
If you switch on air-recirculation mode, the
windows can fog up more quickly, in particu-
lar at low temperatures. Only use air-recircu-
lation mode briefly to prevent the windows
from fogging up.
X Turn the SmartKey to position 2in the igni-
tion lock (Y page 133).
X To activate: press thedbutton.
The indicator lamp in the dbutton lights
up.
i Air-recirculation mode is automatically
activated at high levels of pollution or at
high outside temperatures. When air-recir-
culation mode is activated automatically,
the indicator lamp in the dbutton is not
lit.
Outside air is added after approximately
30 minutes. X
To deactivate: press thedbutton.
The indicator lamp in the dbutton goes
out.
i Air-recirculation mode switches off auto-
matically:
R after approximately five minutes at out-
side temperatures below approximately
41 ‡
R after approximately five minutes if cool-
ing with air dehumidification is deactiva- ted
R after approximately 30 minutes at out-
side temperatures above approximately
41 ‡ (5 †) Activating/deactivating the residual
heat function
The "residual heat" function is only available
in Canada.
It is possible to make use of the residual heat
of the engine to continue heating the station- ary vehicle for up to 30 minutes after the
engine has been switched off. The heating
time depends on the coolant temperature and
on the interior temperature that has been set.
i The blower will run at a low speed regard-
less of the airflow setting.
i If you activate the residual heat function
at high temperatures, only the ventilation
will be activated.
X Turn the SmartKey to position
0(Y page 133) in the ignition lock or
remove it.
X To activate: press theÁbutton.
The indicator lamp in the Ábutton lights
up. Operating the climate control systems
127Climate control Z

Problem
Possible causes/consequences and
M
MSolutions The coolant tempera-
ture gauge shows a
value above 248 ‡
(120 †). A display mes-
sage may also appear in the multifunction dis-
play and a warning tone may sound. The coolant level is too low. The coolant is too hot and the engine
is no longer being cooled sufficiently.
X Stop as soon as possible and allow the engine and the coolant to
cool down.
X Check the coolant level (Y page 278). Observe the warning
notes as you do so and add coolant if necessary. If the coolant level is correct, the radiator fan may be faulty. The
coolant is too hot and the engine is no longer being cooled suffi-
ciently.
X At coolant temperatures below 248 ‡ (120 †), drive to the
nearest qualified specialist workshop.
X Avoid heavy loads on the engine as you do so, e.g. driving in
mountainous terrain and stop-and-go traffic. Automatic transmission
Important safety notes
G
WARNING
If the engine speed is above the idling speed
and you engage transmission position Dor R,
the vehicle could pull away suddenly. There is a risk of an accident.
When engaging transmission position Dor R,
always firmly depress the brake pedal and do not simultaneously accelerate. G
WARNING
The automatic transmission switches to neu-
tral position Nwhen you switch off the engine.
The vehicle may roll away. There is a risk of an
accident.
After switching off the engine, always switch
to parking position P. Prevent the parked vehi-
cle from rolling away by applying the parking
brake.
i Bear in mind that the power transmission
between the engine and the transmission is
interrupted when the engine is switched
off. For this reason, shift the automatic
transmission to Pwhen the engine is
switched off and the vehicle is at a stand- still. Apply the parking brake to prevent the
vehicle from rolling away. Selector lever
Overview of transmission positions !
If the engine speed is too high or if the
vehicle is rolling, do not shift the transmis- sion directly from Dto R, from Rto Dor
directly to P.
Do not open the driver's door while the
vehicle is in motion. At low speeds in trans-
mission position Dor R, park position Pis
otherwise engaged automatically.
The transmission could be damaged. Automatic transmission
139Driving and parking Z

If the coolant temperature is over 248 ‡
(120 †), do not continue driving. The
engine will otherwise be damaged.
The coolant temperature gage is in the instru- ment cluster on the right-hand side
(Y page 197).
Under normal operating conditions and with
the specified coolant level, the coolant tem-
perature may rise to 248 ‡ (120 †). Tachometer
! Do not drive in the overrevving range, as
this could damage the engine.
The red band in the tachometer indicates the engine's overrevving range.
The fuel supply is interrupted to protect the
engine when the red band is reached. Outside temperature display
You should pay special attention to road con-
ditions when temperatures are around freez-
ing point.
Bear in mind that the outside temperature
display indicates the temperature measured
and does not record the road temperature.
The outside temperature display is in the mul- tifunction display (Y page 199).
Changes in the outside temperature are dis-
played after a short delay. Speedometer with segments
The segments in the speedometer indicate
which speed range is available.
R Cruise control activated (Y page 162):
The segments light up from the stored
speed to the maximum speed.
R Variable SPEEDTRONIC activated
(Y page 166):
The segments light up from the start of the
scale to the selected limit speed.
R DISTRONIC PLUS activated (Y page 171):One or two segments in the set speed
range light up.
R DISTRONIC PLUS detects a vehicle in front:
The segments between the speed of the
vehicle in front and the stored speed light
up. Operating the on-board computer
Overview :
Multifunction display
; Switches on the Voice Control System;
see the separate operating instructions
= Right control panel
? Left control panel
A Back button
X To activate the on-board computer: turn
the SmartKey to position 1(Y page 133) in
the ignition lock.
You can control the multifunction display and
the settings in the on-board computer using
the buttons on the multifunction steering
wheel. 198
Displays and operationOn-board computer and displays

Display messages
Possible causes/consequences and
M
MSolutions b
Check Check
Left
LeftDaytime
Daytime
Running
Running
Lamp Lampor Check Right
Check Right
Daytime Running
Daytime Running
Lamp Lamp The left or right-hand daytime running lamp is defective.
X Visit a qualified specialist workshop. b
Malfunction. See Malfunction. See
Operator's Manual Operator's Manual The exterior lighting is defective.
X Visit a qualified specialist workshop. b
Auto Auto
Lamp
LampFunction
Function
Inoperative
Inoperative The light sensor is defective.
X Visit a qualified specialist workshop. b
Switch Off Lights Switch Off Lights The lights are still switched on when you leave the vehicle. A
warning tone also sounds.
X Turn the light switch to Ã.Engine
Display messages
Possible causes/consequences and
M MSolutions +
Check Coolant Check Coolant
Level. See Opera‐ Level. See Opera‐
tor's Manual tor's Manual The coolant level is too low.
X Add coolant, observing the warning notes before doing so
(Y page 278).
X Have the coolant system checked at a qualified specialist work-
shop if the coolant needs topping up more often than usual. ? The fan motor is faulty.
X At coolant temperatures below 248 ‡ (120 †), drive to the
nearest qualified specialist workshop.
X Avoid heavy loads on the engine as you do so, e.g. driving in
mountainous terrain and stop-start traffic. Display
messages
221On-board computer and displays Z

Display messages
Possible causes/consequences and
M
MSolutions ?
Coolant Too Hot Coolant Too Hot
Stop Vehicle Stop Vehicle
Switch Engine Off Switch Engine Off The coolant is too hot.
A warning tone also sounds.
G WARNING
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 (Y page 150).
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. 222
Display
messagesOn-board computer and displays

Display messages
Possible causes/consequences and
M
MSolutions Telephone No Ser‐
Telephone No Ser‐
vice vice Your vehicle is outside the network provider's transmitter/
receiver range.
X Wait until the mobile phone operational readiness symbol
appears in the multifunction display. ¥
Check Washer Fluid Check Washer Fluid The washer fluid level in the washer fluid reservoir has dropped
below the minimum.
X Add washer fluid (Y page 278).SmartKey
Display messages
Possible causes/consequences and
M MSolutions Â
Key Does Not Key Does Not
Belong to Vehicle Belong to Vehicle You have put the wrong SmartKey in the ignition lock.
X Use the correct SmartKey. Â
Take Take
Your
YourKey
Keyfrom
from
Ignition
Ignition The SmartKey is in the ignition lock.
X Remove the SmartKey. Â
Obtain a New Key Obtain a New Key The SmartKey needs to be replaced.
X Visit a qualified specialist workshop. Warning and indicator lamps in the
instrument cluster Overview of warning and indicator
lamps
L Low-beam headlamps (Y page 99)
#
! Turn signal (Y
page 103)
K High-beam headlamps
(Ypage 103)
N Front fog lamps (Y page 101)
R Rear fog lamp (Y page 101)
ü Seat belts (Y page 235)
$
(USA) Braking (Y
page 236) J
(Can-
ada)
Brakes (yellow) (Y
page 236)
! ABS (Ypage 237)
÷ ESP®
(Y page 239)
å ESP®
OFF (Y page 239)
6 Restraint system (Y page 242)
; Check engine (Y page 243)
8 Reserve fuel (Y page 243)
? Coolant (Y page 243)
· Distance warning signal
(Ypage 245)
h Tire pressure monitor
(Ypage 246) 234
Wa
rning and indi cator lamps in the instrument clusterOn-board computer and displays

Engine
Problem
Possible causes/consequences and
M
MSolutions ;
The yellow Check
Engine warning lamp
lights up while the
engine is running.
There may be a malfunction, for example:
R in the engine management
R in the fuel injection system
R in the exhaust system
R in the ignition system
R in the fuel system
The emission limit values may be exceeded and the engine may be
in emergency mode.
X Have the vehicle checked as soon as possible at a qualified
specialist workshop.
i In some states, you must immediately visit a qualified special-
ist workshop as soon as the yellow Check Engine warning lamp
lights up. This is due to the legal requirements in effect in these
states. If in doubt, check whether such legal regulations apply in the state in which you are currently driving. 8
The yellow reserve fuel
warning lamp lights up
while the engine is run-
ning.
The fuel level has dropped into the reserve range.
X Refuel at the nearest gas station. 8
The yellow reserve fuel
warning lamp flashes
while the vehicle is in
motion.
In addition, the
;
Check Engine warning
lamp may light up. The fuel system pressure is too low. The fuel filler cap is not closed
correctly or the fuel system is leaking.
X Check that the fuel filler cap is correctly closed.
X If the fuel filler cap is not correctly closed: close the fuel filler
cap.
X If the fuel filler cap is closed: visit a qualified specialist work-
shop. ?
The red coolant warn-
ing lamp lights up while
the engine is running
and the coolant tem-
perature gage is at the
start of the scale. The temperature sensor for the coolant temperature gage is defec-
tive.
The coolant temperature is no longer being monitored. There is a risk of engine damage if the coolant temperature is too high.
X Pull over and stop the vehicle safely and switch off the engine,
paying attention to road and traffic conditions. Do not continue
driving under any circumstances.
X Apply the parking brake.
X Consult a qualified specialist workshop. Warning and indicator lamps in the instrument cluster
243On-board computer and displays Z