warning light MERCEDES-BENZ G-CLASS SUV 2012 Repair Manual

X
Press LOW RANGE button ;.
When the shift procedure is complete, the
LOW RANGE transfer case position appears
in the multifunction display.
Indicator lamp :lights up.
X Shift the transmission to position D.
Switching off the off-road gear ratio G
WARNING
When the transfer case is in the neutral posi-
tion, power transmission to the driven wheels
is interrupted. As a result, the vehicle could
roll away .There is a risk of an accident.
Secure the vehicle with the parking brake, and
on uphill or downhill gradients, also secure it
with a device such as a wheel chock.
! Only carry out the gear selection if:
R the engine is running.
R the vehicle is rolling.
R the automatic transmission is in selector
lever position N.
R you are driving at less than 70 km/h.
You could otherwise damage the transfer
case.
X Press button ;.
When the shift procedure is complete, the
HIGH RANGE transfer case position appears
in the multifunction display.
Indicator lamp :goes out.
If the gear change is not completed, the fol-
lowing messages could appearint he display:
R TC shift conditions not fulfilled You have not met one or more shift condi-
tions.
R TC NEUTRAL on The transfer case has cancelled the gear
change process and is in N.TheN transfer
case position appears in the multifunction
display.
R TC shift cancelled The transfer case has not performed the
gear change process. X
Repeatt he gear change process.
Make sure to meet all conditions for chang-
ing gears.
R TC Malfunction Visit workshop There is a malfunction in the transfer case.
X Do not shift the transfer case.
X Have the vehicle checked as soon as pos-
sible at a qualified specialist workshop.
Shifting to neutral G
WARNING
When the transfer case is in the neutral posi-
tion, power transmission to the driven wheels
is interrupted. As a result, the vehicle could
roll away.T here is a risk of an accident.
Secure the vehicle with the parking brake, and
on uphill or downhill gradients, also secure it
with a device such as a wheel chock.
X Turn the key to position 2(Ypage 143) in
the ignition lock.
X Apply the parking brake.
X Depress the brake pedal.
X Move the selector lever to position
N(Y page 149).
X Press and hold LOW RANGE button ;for
approximately 10 seconds.
Once the gear change procedure is com-
plete, TC in neutral message appears in
the multifunction display for approximately
5s econds.
If the gear change is not completed, the fol-
lowing messages could appear in the display
(Y page 241).
i If the transfer case is in Neutral, the key
is in the ignition lock and you open the driv-
er's door, the TC in neutral message
appears in the multifunction display. If you
then release the parking brake, a warning
tone will sound. Off-road driving systems
203Driving and parking Z

For further information on driving off-road,
see (Y page 169).
i You can only engage the differential locks
if the transfer case is in the LOW RANGE
off-road driving positio n(Ypage 201).
i You can activate the differential locks in
the following order =,?,;.
Differential lock for the transfer case X
To engage: switch the transfer case to the
LOW RANGE off-road driving position
(Y page 202).
X Press switch =.
When the transfer case is in the LOW
RANGE off-road driving position, the yellow
activation indicator lamp below switch =
lights up.
The å warning lamp in the instrument
panel lights up.
When the differential is locked, the red
function indicator lamp above switch =
lights up.
The following message appears in the mul-
tifunction display:
ABS not available differential locked
The
å!÷ warning lamps in the
instrument cluster light up.
The differential lock for the transfer case is
engaged.
4ETS, ESP ®
, BASa nd ABS ar edeactivated.
The vehicle's ability to steer is severely
restricted. Drive carefully and accelerate gen-
tly for optimum traction.
i You can now engage the differential lock
for rear axle ?and the differential lock for
front axle ;as required. Differential lock for the rear axle X
To engage: press switch ?.
Yellow activation indicator lamp Alights
up first, followed by red function indicator
lamp :of switch ?.
The differential lock for the rear axle is
engaged.
Differential lock for the front axle X
To engage: press switch ;.
The yellow activation indicator lamp lights
up first, followed by the red function indi-
cator lamp.
The differential lock for the front axle is
engaged.
Deactivating the differential lock You can deactivate the differential locks in
this order:
;,?,=.
X To simultaneously deactivate all differ-
ential locks: press switch=.
Yellow activation indicator lamps Aand
red function indicator lamps :go out.
After approximately three seconds of nor-
mal driving, ABS, 4ETS, ESP ®
and BAS are
activated.
The ABS not available differential
locked message disappears from the mul-
tifunction display and the å,!and
÷ warning lamps in the instrument clus-
ter go out.
X Shift the transfer case to the HIGH
RANGE on-road position (Y page 202).
If red function indicator lamps :do not go
out when deactivating the differential locks:
X Observe the traffic situation.
X While driving, make some gentle steering
movements.
Red function indicator lamps :go out as
soon as the differential locks have been
disengaged. Off-road driving systems
205Driving and parking Z

=
Rev counter (Y page 212)
? Coolan ttemperature (Y page 212)
A Fuel gauge
B Instrument cluster lighting (Y page 212)Instrument cluster lighting
The lighting in the instrument cluster, in the
displays and the controls in the vehicle inte-
rior can be adjusted using the brightness con-
trol knob.
The brightness control knob is located on the
bottom left of the instrument cluster
(Y page 211).
X Turn the brightness control knob clockwise
or anti-clockwise.
If the light switch is set to Ã,Tor
L, the brightness is dependen tupon
the brightness of the ambient light.
i The light senso rinthe instrumentc luster
automatically controls the brightness of
the multifunction display.
In daylight, the displays in the instrument
cluster are not illuminated. Displaying the coolant temperature
The coolan ttemperature gauge is in the
instrument cluster on the right-hand side
(Y page 211).
The reading may rise up to 120 †undernor-
mal driving conditions if the coolant has been
filled correctly.
At high outside temperatures and when driv-
ing uphill, the coolant temperature may rise
to the end of the scale. Rev counter
! Do not drive in the overrevving range.
Doing so will damage the engine.
The red band in the rev counter indicates the
engine's overrevving range. The fuel supply is interrupted to protec
tthe
engine when the red band is reached. Outside temperature display
G
WARNING
At temperatures just above freezing point, the
street may be icy, especially in wooded areas
or on bridges. If you do not adapt your driving
style to the conditions, the vehicle could skid.
For this reason, adapt your driving style and
speed to the weather conditions.
The outside temperature displayi s in the mul-
tifunction display (Y page 214).
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 173):
The segments light up from the stored
speed to the maximum speed.
R Variable SPEEDTRONIC activated
(Y page 178):
The segments light up from the start of the
scale to the selected limit speed.
R DISTRONIC PLUS activated (Y page 184):
One or two segments in the set speed
range light up.
R DISTRONIC PLUS detects avehicle in front:
The segments between the speed of the
vehicle in fron tand the stored speed light
up. 212
Displays and operationOn-board computer and displays

Vehicle
Setting permanen
tSPEEDTRONIC
X Press the =or; button on the steer-
ing wheel to select the Settings menu.
X Press the :or9 button to select the
Vehicle submenu.
X Press ato confirm.
X Press :or9 to select the Limit speed (winter tyres): function.
You will see the current setting.
X Press ato confirm.
X Press the :or9 button to adjust
permanent SPEEDTRONIC in increments of
ten (230 km/h to
160 km/h ). The
Off set-
ting switches permanent SPEEDTRONIC
off.
X Press the abutton to store the entry.
For further information on permanent SPEED-
TRONIC (Y page 182).
Switching the automatic locking feature
on/off
If you activate the Auto. door locks func-
tion, the vehicle is centrally locked above a
speed of approximately 15 km/h.
X Press the =or; button on the steer-
ing wheel to select the Settings menu.
X Press the :or9 button to select the
Vehicle submenu.
X Press ato confirm.
X Press :or9 to select the Auto. door locks function.
When the Auto. door locks function is
activated, the vehicle doors are displayed
in red in the multifunction display.
X Press the abutton to save the setting.
For further information on the automatic lock-
ing feature, see (Y page 74). Activating/deactivating the acoustic
locking confirmation
If you switch on the
Acoustic Lock function,
an acoustic signal sounds when you lock the
vehicle.
X Press the =or; button on the steer-
ing wheel to select the Settings menu.
X Press the :or9 button to select the
Vehicle submenu.
X Press ato confirm.
X Press the :or9 button to select the
Acoustic Lock function.
If the Acoustic Lock function is activated,
the & symbol in the multifunction dis-
play lights up red.
X Press the abutton to save the setting.
Heating Auxiliary heating departure time
G
WARNING
Exhaust fumes are produced when the auxili-
ary heating is in operation. Inhaling these
exhaust fumes can be poisonous. You should
therefore switch off the auxiliary heating in
confined spaces without an extraction sys-
tem, e.g. a garage. G
WARNING
When operating the auxiliary heating parts of
the vehicle can get very hot. Make sure that
the exhaust system does not under any cir-
cumstances come into contact with easily
ignitable material such as dry grass or fuels.
The material could otherwise ignite and set
the vehicle alight. Choose your parking spot
accordingly.
Operating the auxiliary heating is thus pro-
hibited at filling stations or when your vehicle
is being refuelled. You must therefore switch
off the auxiliary heating at filling stations.
! Operating the auxiliary heating/ventila-
tion draws on the vehicle battery. After you
have heated or ventilated the vehicle a Menus and submenus
223On-board computer and displays Z

maximum of two times, drive for a longer
distance.
This function is only available on vehicles with
auxiliary heating (Y page 126).
In the Heating submenu, you can select a
stored departure time or change a departure
time.
The auxiliary heating timer function calcu-
lates the switch-on time according to the out-
side temperature so that the vehicle is pre-
heated by the departure time. When the
departure time is reached, the auxiliary heat-
ing continues to heat for a further five
minutes and then switches off. The auxiliary
heating adopts the THERMATIC temperature
setting.
You can switch off the auxiliary heating by
using the remote control or the &auxiliary
heating button on the centre console.
Selecting the departure time or deactivat-
ing a selected departure time
X Press the =or; button on the steer-
ing wheel to select the Settings menu.
X Press the :or9 button to select the
Heating submenu.
X Press ato confirm.
You will see the selected setting.
X Press ato confirm.
X Press the :or9 button to select
one of the three departure times or Timeroff (no timer active).
X Press ato confirm.
If a departure time is selected, the yellow
indicator lamp lights up on the &auxil-
iary heating button.
Changing the departure time
X Press the =or; button on the steer-
ing wheel to select the Settings menu.
X Press the :or9 button to select the
Heating submenu.
X Press ato confirm.
You will see the selected setting. X
Press ato confirm.
X Press the :or9 button to select
Change A ,
B or
C .
X Press ato confirm.
You can now change the departure time.
X Press the =or; button to select the
display to be changed :hours, minutes.
X Press the :or9 button to set the
selected display.
X Press the abutton to store the entry.
The yellow indicator lamp on the &aux-
iliary heating button lights up.
Convenience Activating/deactivating the EASY-
ENTRY/EXIT feature
G
WARNING
The steering wheel moves when the EASY-
ENTRY/EXIT feature is active. There is a risk
of occupants becoming trapped. Before acti-
vating the EASY-ENTRY/EXIT feature, make
sure that nobody can become trapped.
Do not leave children unsupervised in the
vehicle, even if they are secured in a child
restraint system. The children could open the
driver's door and thereby unintentionally acti-
vate the EASY-ENTRY/EXIT feature and
become trapped.
X Press the =or; button on the steer-
ing wheel to select the Settings menu.
X Press the :or9 button to select the
CONVENIENCE submenu.
X Press ato confirm.
X Press :or9 to select the Easy Entry/Exit: function.
If the Easy Entry/Exit function is activa-
ted, the vehicle steering wheel is displayed
in red in the multifunction display.
X Press the abutton to save the setting.
Further information on the EASY-ENTRY/EXIT
feature (Y page 98). 224
Menus and submenusOn-board computer and displays

Safety systems
Display messages Possible causes/consequences and
M Solutions
!÷
currently unavail‐
able See Owner's
Manual ABS (Anti-lock Braking System), ESP
®
(Electronic Stability Pro-
gram), BAS (Brake Assist), the HOLD function, hill start assist and
ESP ®
trailer stabilisation are temporarily unavailable.
BAS and the adaptive brake lights may also have failed.
In addition, the ÷,åand! warning lamps light up in
the instrument cluster.
Possible causes:
R Self-diagnosis is not yet complete.
R The on-board voltage may be insufficient.
G WARNING
The brake system continues to function normally, but without the
functions listed above. The wheels could therefore lock if you
brake hard, for example.
The steerability and braking characteristics may be severely affec-
ted. The braking distance in an emergency braking situation can
increase.
If ESP ®
is not operational, ESP ®
is unable to stabilise the vehicle.
The danger of skidding and having an accident increases.
X Carefully drive on a suitable stretch of road making slight steer-
ing movements at a speed above 20 km/h.
If the display message disappears, the functions mentioned
above are available again.
If the display message continues to be displayed:
X Drive on carefully.
X Visit a qualified specialist workshop. !÷
inoperative See
Owner's Manual ABS, ESP
®
, BAS, the HOLD function, hill start assist and
ESP ®
trailer stabilisation are unavailable due to a malfunction.
BAS and the adaptive brake lights may also have failed.
In addition, the J,÷,åand! warning lamps light
up in the instrument cluster.
G WARNING
The brake system continues to function normally, but without the
functions listed above. The wheels could therefore lock if you
brake hard, for example.
The steerability and braking characteristics may be severely affec-
ted. The braking distance in an emergency braking situation can
increase. Display messages
229On-board computer and displays Z

Display messages Possible causes/consequences and
M Solutions
If ESP
®
is no toperational, ESP ®
is unable to stabilise the vehicle.
The danger of skidding and having an acciden tincreases.
X Drive on carefully.
X Visi taqualified specialist workshop immediately. ÷
currently unavail‐
able See Owner's
Manual ESP
®
, BAS, the HOLD function, hill start assist and ESP ®
trailer
stabilisation are unavailable due to a malfunction.
BASa nd the adaptive brake lights may also have failed.
In addition, the ÷andå warning lamps light up in the
instrument cluster.
The self-diagnosis functio nmay no tbe complete, for example.
G WARNING
The brake system continues to function normally, but without the
functions listed above.
The braking distance in an emergency braking situation can thus
increase.
If ESP ®
is not operational, ESP ®
is unable to stabilise the vehicle.
The danger of skidding and having an acciden tincreases.
X Carefully drive on a suitable stretch of road making slight steer-
ing movements at a speed above 20 km/h.
If the display message disappears, the functions mentioned
above are available again.
If the display message continues to be displayed:
X Drive on carefully.
X Visi taqualified specialist workshop. 230
Display messagesOn-board computer and displays

Display messages Possible causes/consequences and
M Solutions
÷
inoperative See
Owner's Manual ESP
®
, BAS, the HOLD function, hill start assist and ESP ®
trailer
stabilisation are unavailable due to a malfunction.
BA Sa nd the adaptive brake lights may also have failed.
In addition, the ÷andå warning lamps light up in the
instrument cluster.
G WARNING
The brake system continue sto function normally, but without the
functions listed above.
The braking distance in an emergency braking situation can thus
increase.
If ESP ®
is not operational, ESP ®
is unable to stabilise the vehicle.
The danger of skidding and having an accident increases.
X Drive on carefully.
X Visit a qualified specialist workshop. T!
÷
inoperative See
Owner's Manual EBD (electronic brake force distribution), ABS, ESP
®
, BAS, the
HOLD function, hill start assist and ESP ®
trailer stabilisation are
unavailable due to a malfunction.
BAS and the adaptive brake lights may also have failed.
In addition, the ÷,åand! warning lamps light up in
the instrument cluster and a warning tone sounds.
G WARNING
The brake system continues to function normally, but without the
functions listed above. The front and rear wheels could therefore
lock if you brake hard, for example.
The steerability and braking characteristics may be severely affec-
ted. The braking distance in an emergency braking situation can
increase.
If ESP ®
is not operational, ESP ®
is unable to stabilise the vehicle.
The danger of skidding and having an accident increases.
X Drive on carefully.
X Visit a qualified specialist workshop immediately. !
Release parking
brake You are driving with the parking brake applied
.Awarning tone also
sounds.
X Release the parking brake. Display messages
231On-board computer and displays Z

Display messages Possible causes/consequences and
M Solutions
J
Check brake fluid
level There is insufficien
tbrake fluid in the brake fluid reservoir. In addi-
tion, the Jwarning lamp in the instrument cluster lights up and
a warning tone sounds.
G WARNING
The braking efficiency may be impaired.
There is a risk of an accident.
X Pull over and stop the vehicle safely as soon as possible, paying
attention to road and traffic conditions. Do not continue driving
under any circumstances.
X Secure the vehicle against rolling away (Y page 163).
X Consult a qualified specialist workshop.
X Do not top up the brake fluid. This does not correct the error. #
Check brake pad
wear The brake pads/linings have reached their wearl
imit.
X Visit a qualified specialist workshop. ü If the symbol appears in the multifunction display,
aseat belt
tongue has been inserted into a rear seat belt buckle.
Further information on the status indicator for the rear seat belts
(Y page 47). ý If the symbol appears in the multifunction display,
aseat belt
tongue has not been inserted in a rear seat belt buckle.
G WARNING
As eat belt which is not worn correctly, or which has not been
engaged in the seat belt buckle correctly, cannot provide the
intended level of protection.
This poses an increased risk of injury.
X If necessary, ask the occupants in the rear to fasten their seat
belts (Y page 44).
Further information on the status indicator for the rear seat belts
(Y page 47). 232
Display messagesOn-board computer and displays

Display messages Possible causes/consequences and
M Solutions
6
Restraint syst.
malfunction Con‐
sult workshop There is a malfunction in the SRS (Supplemental Restrain
tSys-
tem). The 6warning lamp also lights up in the instrumen tclus-
ter.
G WARNING
The airbags or belt tensioners may either be triggered uninten-
tionally or, in the even tofanaccident, may not be triggered.
This poses an increased ris kofinjury.
X Visi taqualified specialist workshop.
For further information about the Supplemental Restrain tSystem,
see (Y page 39). 6
Front
left malfunc‐
tion Consult work‐
shop orFront right
malfunction Con‐
sult workshop SRS has malfunctioned at the front on the left or right. The
6
warning lamp also lights up in the instrumen tcluster.
G WARNING
The airbags or belt tensioners may either be triggered uninten-
tionally or, in the even tofanaccident, may not be triggered.
This poses an increased ris kofinjury.
X Visi taqualified specialist workshop. 6
Rear left malfunc‐
tion Consult work‐
shop orRear right
malfunction Con‐
sult workshop SRS has malfunctioned at the rear on the left or right. The
6
warning lamp also lights up in the instrument cluster.
G WARNING
The airbags or belt tensioner smay either be triggered uninten-
tionally or, in the event of an accident, may no tbe triggered.
This poses an increased risk of injury.
X Visit a qualified specialist workshop. Display messages
233On-board computer and displays Z