2014 MERCEDES-BENZ G-Class coolant

Problem Possible causes/consequences and
0050
0050Solutions The coolant
temperature gauge
shows a value above
248 ‡(120 †). A
display message may
also appear in the
multifunction display
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 285). 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
sufficiently.
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 start/stop 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
neutral 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
vehicle 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 standstill. 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
transmission directly from Dto R, from R
to Dor directly to P.
Do not open the driver's door while the
vehicle is in motion. At low speeds in
transmission position Dor R, park position
P is otherwise engaged automatically.
The transmission could be damaged. Automatic transmission
145Driving and parking Z

Displays and operation
Instrument cluster
Instrument cluster: miles
0043
Speedometer with segments (Y page 206)
0044 Multifunction display (Y page 207)
0087 Tachometer (Y page 206)
0085 Coolant temperature ( Ypage 205)
0083 Fuel gauge
0084 Instrument cluster lighting (Y page 205)Instrument cluster lighting
The brightness control knob is located on the
bottom left of the instrument cluster
(Y page 205).
X Turn the brightness control knob clockwise
or counter-clockwise.
If the light switch is set to 0058,0060or
0058, the brightness is dependent upon
the brightness of the ambient light.
i The light sensor in the instrument cluster
automatically controls the brightness of
the multifunction display.
In daylight, the displays in the instrument
cluster are not illuminated. Displaying the coolant temperature
G
WARNING
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 engine 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.
! A display message is shown if the coolant
temperature is too high. Displays and ope
ration
205On-board computer and displays Z

If the coolant temperature is over
248 ‡(120 †), do not continue driving. The
engine will otherwise be damaged.
The coolant temperature gauge is in the
instrument cluster on the right-hand side
(Y page 205).
Under normal operating conditions and with
the specified coolant level, the coolant
temperature 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
G
WARNING
The outside temperature indicator is not
designed to serve as an ice-warning device
and is therefore unsuitable for that purpose.
Indicated temperatures just above the
freezing point do not guarantee that the road
surface is free of ice. The road may still be icy,
especially in wooded areas or on bridges.
The outside temperature display is in the
multifunction display (Y page 207).
Changes in the outside temperature are
displayed after a short delay. Speedometer with segments
The segments in the speedometer indicate
which speed range is available.
R Cruise control activated (Y page 168):
The segments light up from the stored
speed to the maximum speed.
R Variable SPEEDTRONIC activated
(Y page 174): The segments light up from the start of the
scale to the selected limit speed.
R DISTRONIC PLUS activated (Y page 179):
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 0043
Multifunction display
0044 To switch on the Voice Control System;
see the separate operating instructions
0087 Right control panel
0085 Left control panel
0083 Back button
X To activate the on-board computer: turn
the SmartKey to position 1(Ypage 139) 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. 206
Displays and operationOn-board computer and displays

X
Press 0064or0063 to select the Easy
Easy
Entry/Exit:
Entry/Exit: function.
If the Easy Entry/Exit
Easy Entry/Exit function is
activated, the vehicle steering wheel is
displayed in red in the multifunction
display.
X Press the 0076button to save the setting.
Further information on the EASY-ENTRY/EXIT
feature (Y page 92).
Switching the fold-in mirrors with the
locking feature on/off
When you activate the Auto. Mirror Auto. Mirror
Folding
Folding function, the exterior mirrors are
folded in when the vehicle is locked. If you
unlock the vehicle and then open a door, the
exterior mirrors fold out again.
X Press the 0059or0065 button on the
steering wheel to select the Sett. Sett.menu.
X Press the 0064or0063 button to select the
Convenience
Convenience submenu.
X Press 0076to confirm.
X Press 0064or0063 to select the Auto.
Auto.
Mirror Folding
Mirror Folding function.
If the Auto. Mirror Folding
Auto. Mirror Folding function is
activated, the vehicle's exterior mirror is
displayed in red in the multifunction
display.
X Press the 0076button to save the setting. 0043
To fold the exterior mirrors in or out
If you have switched the Auto. Mirror Auto. Mirror
Folding
Folding on and you fold the exterior mirrors
in using button 0043, they will not fold out
automatically (Y page 93). You can then only fold out the exterior mirrors
using button
0043. Restoring the factory settings
X Press the 0059or0065 button on the
steering wheel to select the Sett.
Sett. menu.
X Press the 0064or0063 button to select the
Factory Setting Factory Setting submenu.
X Press 0076to confirm.
The Reset All Settings?
Reset All Settings? message
appears.
X Press the 0064or0063 button to select
No
No orYes
Yes.
X Press 0076to confirm the selection.
If you select Yes
Yes, the multifunction display
shows a confirmation message.
For safety reasons, the Daytime Running
Daytime Running
Lights
Lights function in the Lights
Lightssubmenu is
only reset if the vehicle is stationary. AMG menu in AMG vehicles
AMG displays 0043
Digital speedometer
0044 Gear indicator
0087 Upshift indicator
0085 Engine oil temperature
0083 Coolant temperature
0084 Status indicator for ECO start/stop
function (Y page 141)
X Press 0059or0065 on the steering wheel
to select the AMG AMGmenu.
Upshift indicator UP
UP0087 indicates that the
engine has reached the overrevving range
when in the manual gearshift program. Menus and submenus
217On-board computer and displays Z

Display messages Possible causes/consequences and
0050
0050Solutions 0049
Check Check
Left
LeftDaytime
Daytime
Running Light
Running Light or
Check Right
Check Right
Daytime Running Daytime Running
Light Light The left or right-hand daytime running lamp is defective.
X
Visit a qualified specialist workshop. 0049
Malfunction See Malfunction See
Operator's Manual Operator's Manual The exterior lighting is defective.
X
Visit a qualified specialist workshop. 0049
Auto Auto
Lamp
LampFunction
Function
Inoperative
Inoperative The light sensor is defective.
X
Visit a qualified specialist workshop. 0049
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 0058.Engine
Display messages Possible causes/consequences and
0050 0050Solutions 00BD
Check Coolant Check Coolant
Level See Level See
Operator's Manual Operator's Manual The coolant level is too low.
X
Add coolant, observing the warning notes before doing so
(Y page 285).
X Have the coolant system checked at a qualified specialist
workshop if the coolant needs topping up more often than usual. 00AC The fan motor is faulty.
X
At coolant temperatures below 248 ‡(120 †), drive to the next
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
229On-board computer and displays Z

Display messages Possible causes/consequences and
0050
0050Solutions 00AC
Coolant Too Hot Coolant Too Hot
Stop Vehicle Turn Stop Vehicle Turn
Engine Off 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 ( Ypage 156).
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 †).
Otherwise, 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. 230
Display
messagesOn-board computer and displays

SmartKey
Display messages Possible causes/consequences and
0050
0050Solutions 00AF
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. 00AF
Take Take
Your
YourKey
Keyfrom
from
Ignition
Ignition The SmartKey is in the ignition lock.
X
Remove the SmartKey. 00AF
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
0058 Low-beam
headlamps(Ypage 99)
003E003D Turn signals (Ypage 103)
0057 High-beam headlamps
(Ypage 103)
005A Fog lamps (Ypage 101)
005E Rear fog lamp (Y page 101)
00E9 Seat belts (Ypage 243)
0027 (USA) Brakes (Y page 244)
004D (Canada)B rakes (yellow)
(Y page 244)
0025 ABS (Ypage 245)
00E5 ESP®
(Y page 247)
00BB ESP®
OFF (Y page 247)
0075 SRS (Ypage 250)
00B9 Check Engine (Y page 251)
00B6 Reserve fuel (Ypage 251)
00AC Coolant (Ypage 251)
00BA Distance warning signal
(Ypage 253)
0077 Tire pressure monitor
(Ypage 254) 242
Warning and indicator lamps in the instrument clusterOn-board computer and displays

Engine
Problem Possible causes/consequences and
0050
0050Solutions 00B9
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
specialist 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. 00B6
The yellow reserve fuel
warning lamp lights up
while the engine is
running.
The fuel level has dropped into the reserve range.
X
Refuel at the nearest gas station. 00B6
The yellow reserve fuel
warning lamp flashes
while the vehicle is in
motion.
In addition, the
00B9
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
workshop. 00AC
The red coolant
warning lamp lights up
while the engine is
running and the coolant
temperature gauge is
at the start of the scale.
The temperature sensor for the coolant temperature gauge is
defective.
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
251On-board computer and displays Z