warning light MERCEDES-BENZ G-CLASS SUV 2015 Service Manual

Problems with PARKTRONIC
ProblemPossible causes/consequences andMSolutions
Only the red segments
in the PARKTRONIC
warning displays are lit.
You also hear a warning
tone for approximately
two seconds.
PARKTRONIC is deacti-
vated after a few sec-
onds, and the indicator
lamp in the
PARKTRONIC button
lights up.PARKTRONIC has malfunctioned and has switched off.
X If problems persist, have PARKTRONIC checked at a qualified
specialist workshop.
Only the red segments
in the PARKTRONIC
warning displays are lit.
PARKTRONIC is deacti-
vated after a few sec-onds.The PARKTRONIC sensors are dirty or there is interference. X Clean the PARKTRONIC sensors ( Ypage 211).
X Switch the ignition back on.
The problem may be caused by an external source of radio or
ultrasound waves. XSee if PARKTRONIC functions in a different location.
Rear view camera
Important safety notes
The rear view camera is only an aid. It is not a replacement for your attention to your imme-
diate surroundings. You are always responsi-
ble for safe maneuvering and parking. When
maneuvering or parking, make sure that there are no persons, animals or objects in the area in which you are maneuvering.
Under the following circumstances, the rear
view camera will not function, or will function
in a limited manner:
R the rear door is open
R in heavy rain, snow or fog
R at night or in very dark places
R if the camera is exposed to very bright light
R if the area is lit by fluorescent light or LED
lighting (the display may flicker) R
if there is a sudden change in temperature,
e.g. when driving into a heated garage inwinter
R if the camera lens is dirty or obstructed
R if the rear of your vehicle is damaged. In this
event, have the camera position and setting checked at a qualified specialist workshop
Mercedes-Benz recommends that you use
an authorized Mercedes-Benz Center for
this purpose
Driving systems131
Driving and parking
Z

is interrupted. As a result, the vehicle could
roll away. There is a risk of an accident.
Secure the vehicle with the parking brake, andon uphill or downhill gradients, also secure it
with a device such as a wheel chock.
Always wait for the gear change process from HIGH RANGE toLOW RANGE and from
LOW RANGE toHIGH RANGE to complete.
Do not switch off the engine while changing
gear and do not shift the automatic transmis-
sion to another gear.
General notes
:Current shift range
:Indicator lamp
;LOW RANGE button
Switching on the off-road gear ratio
!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 no faster than 25 mph
(40 km/h).
You could otherwise damage the transfercase.
iAMG vehicles: the ECO start/stop func-
tion is not available in transfer case posi- tion LOW RANGE (Y page 105).
X Press LOW RANGE button ;.
When the shift procedure is complete, the
LOW RANGEtransfer 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
GWARNING
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 no faster than 43 mph
(70 km/h).
You could otherwise damage the transfercase.
X Press button ;.
When the shift procedure is complete, the
HIGHRANGEtransfer case position appears
in the multifunction display.
Indicator lamp :goes out.
If the gear change is not completed, the fol-
lowing messages could appear in the 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 canceled the gear
change process and is in N. Transfer case
Off-road driving systems133
Driving and parking
Z

The disadvantage of a differential is that the
wheels that have the least grip, get the most
drive. An example: a wheel of a driven axle is
on a snow-covered surface and therefore
does not have any traction. The differential
sends most of the drive force to this wheel
because the force takes the route of the low-
est resistance. The opposite wheel on this
axle, however, which stands on firm ground
and could therefore allow propulsion,
receives no driving power. 4ETS compen-
sates for this disadvantage. 4ETS provides
good steerability by automatically braking the
spinning wheel. 4ETS provides the wheel on
the firm surface with more drive force, which in turn provides propulsion. ESP ®
and 4ETS are traction systems that are
ideal for road driving and suitable for light off-
road driving. The LOW RANGEoff-road gear
also improves off-road capability.
More challenging off-road conditions require
additional measures such as locking one or
more differential. Your vehicle is equipped
with three differential locks:
R a central differential lock for the transfercase
R a differential lock for the front axle and
R a differential lock for the rear axle
Each differential lock can be engaged with the corresponding switch on the center console.
If the differential in the transfer case is
locked, the front and rear wheels rotate at the same speed. If the differential for the rear axle
is locked, both rear wheels rotate at the same
speed, regardless of their respective torque.
Note, engaging the differential lock greatly
impairs the vehicle's steerability.
Note, it is imperative to use the differential
function when driving on firm road surfaces.
Under no circumstances should the differen-
tial be locked when driving on firm road sur-
faces. Otherwise, the vehicle may not be
steerable and you could lose control of the
vehicle. Therefore, only engage the differen-
tial lock when driving off-road. You should
only engage the differential lock if activating 4ETS and ESP
®
driving systems and LOW
RANGE off-road gear prove to be insufficient.
Engaging the differential locks
Important safety notes
GWARNING
When differential locks are engaged on a firm,
high-grip surface, the vehicle's steerability is
greatly impaired. In particular, engaging the
differential locks when cornering could lead
to you losing control of the vehicle. There is a
risk of an accident.
Disengage the differential locks immediately
on firm surfaces with good grip.
GWARNING
When the differential locks are engaged, ABS,
4ETS, ESP ®
and BAS are deactivated. As a
result, the wheels could lock when braking
and the braking distance is increased. There is
a risk of an accident.
Disengage the differential locks immediately
on firm surfaces with good grip.
!Only engage the differential locks when:
R you are driving at walking pace.
R the driven wheels are not spinning.
R you are not driving on a firm road surface.
General notes
The switches are located on the center con- sole.
:Function indicator lamps (red)
;Differential lock for the front axle
Off-road driving systems135
Driving and parking
Z

=Differential lock for the transfer case
?Differential lock for the rear axle
AActivation indicator lamps (yellow)
Engage the differential locks: R off-road
R to deactivate ABS, 4ETS, ESP ®
and BAS
while off-road
R when fording
For more information on driving off-road, see the Digital Operator's Manual.
iYou can engage 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 132).
X Press switch =.
If the transfer case is in the LOW RANGE
off-road position, the yellow activation indi- cator lamp under switch =lights up.
The å warning lamp in the instrument
cluster lights up.
If the differential is locked, the red function indicator lamp above switch =lights up.
In the multifunction display you see the:
ABS not available differential
lockedmessage.
The å!÷ warning lamps light up
in the instrument cluster.
The differential lock for the transfer case is
engaged.
4ETS, ESP ®
, BAS and ABS are deactivated.
The vehicle's ability to steer is severely
restricted. Drive carefully and accelerate gen-
tly for optimum traction.
iYou 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 ;.
First, the yellow activation indicator lamp
lights up, followed by the red function indi- cator lamp.
The differential lock for the front axle is
engaged.
Disengaging the differential locks
You can disengage the differential locks in the
following order: ;,? ,= .
X To simultaneously disengage 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
ABSnotavailabledifferential
lockedmessage disappears in the multi-
function 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 ( Ypage 132).
iIf red function indicator lamps :do not
go out when disengaging the differential
locks, stop the vehicle safely as soon as
possible, in accordance with the traffic con- ditions. Then, continue driving and the load
change can release the differential lock.
136Off-road driving systems
Driving an d parking

Useful information
iThis Operator's Manual describes all
models and all standard and optional equip- ment of your vehicle available at the time of
publication of the Operator's Manual.
Country-specific differences are possible.
Please note that your vehicle may not be
equipped with all features described. This
also applies to safety-related systems and
functions.
iRead the information on qualified special-
ist workshops: ( Ypage 28).
Important safety notes
GWARNING
If you operate information systems and com-
munication equipment integrated in the vehi-
cle while driving, you will be distracted from
traffic conditions. You could also lose controlof the vehicle. There is a risk of an accident.
Only operate the equipment when the traffic
situation permits. If you are not sure that this
is possible, park the vehicle paying attention
to traffic conditions and operate the equip-
ment when the vehicle is stationary.
GWARNING
If the instrument cluster has failed or mal-
functioned, you may not recognize function
restrictions in systems relevant to safety. The operating safety of your vehicle may be
impaired. There is a risk of an accident.
Drive on carefully. Have the vehicle checked
at a qualified specialist workshop immedi-ately.
The on-board computer only shows messages
or warnings from certain systems in the mul- tifunction display. You should therefore make
sure your vehicle is operating safely at all
times. Otherwise, a vehicle that is not oper-
ating safely may cause an accident. You must observe the legal requirements for
the country in which you are currently driving
when operating the on-board computer.
For an illustration of the instrument cluster,
see ( Ypage 146).
Displays and operation
Information in the Digital Operator's
Manual
In the Digital Operator's Manual you will find
information on the following topics: R
Instrument cluster
R Instrument cluster lighting
R Coolant temperature display
R Tachometer
R Speedometer with segments
R Multifunction display
R Outside temperature display
Operating the on-board computer
Overview
:Multifunction display
;Switches on the Voice Control System;
see the separate operating instructions
=Right control panel
146Displays and operation
On-board computer and displays

Safety systems
Display messagesPossible causes/consequences andMSolutions
!÷
Currently UnavailZ
able. See OperaZ
tor's Manual
ABS (Anti-lock Braking System), ESP®
(Electronic Stability Pro-
gram), BAS (Brake Assist), the HOLD function, hill start assist and
ESP ®
trailer stabilization are temporarily unavailable.
BAS and the adaptive brake lights may also have failed.
In addition, the ÷,å and! warning lamps light up in the
instrument cluster.
Possible causes are: R self-diagnosis is not yet complete.
R the on-board voltage may be insufficient.
GWARNING
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 stabilize the vehicle.
There is an increased risk of skidding and an accident.
X Carefully drive a suitable distance, making slight steering move-
ments at a speed above 12 mph (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
Operator's Manual
ABS, ESP ®
, BAS, the HOLD function, hill start assist and
ESP ®
trailer stabilization are unavailable due to a malfunction.
BAS and the adaptive brake lights may also have failed. The $ (USA only)/ J(Canada only), ÷,å and!
warning lamps in the instrument cluster also light up.
GWARNING
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 messages149
On-board computer and displays
Z

Display messagesPossible causes/consequences andMSolutions
If ESP®
is not operational, ESP ®
is unable to stabilize the vehicle.
There is an increased risk of skidding and an accident.
X Drive on carefully.
X Visit a qualified specialist workshop immediately.
÷
Currently UnavailZ
able. See OperaZ
tor's Manual
ESP ®
, BAS, the HOLD function, hill start assist and ESP ®
trailer
stabilization are unavailable due to a malfunction.
BAS and the adaptive brake lights may also have failed.
In addition, the ÷andå warning lamps light up in the
instrument cluster.
The self-diagnosis function might not be complete, for example.
GWARNING
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 stabilize the vehicle.
There is an increased risk of skidding and an accident.
X Carefully drive a suitable distance, making slight steering move-
ments at a speed above 12 mph (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.
150Display messages
On-board computer and displays

Display messagesPossible causes/consequences andMSolutions
÷
Inoperative. See
Operator's Manual
ESP®
, BAS, the HOLD function, hill start assist and ESP ®
trailer
stabilization are unavailable due to a malfunction.
BAS and the adaptive brake lights may also have failed.
In addition, the ÷andå warning lamps light up in the
instrument cluster.
GWARNING
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 stabilize the vehicle.
There is an increased risk of skidding and an accident.
X Drive on carefully.
X Visit a qualified specialist workshop.
T !
÷
Inoperative. See
Operator's Manual
EBD (electronic brake force distribution), ABS, ESP ®
, BAS, the
HOLD function, hill start assist and ESP ®
trailer stabilization are
unavailable due to a malfunction.
BAS and the adaptive brake lights may also have failed.
In addition, the ÷,å and! warning lamps light up in the
instrument cluster and a warning tone sounds.
GWARNING
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 stabilize the vehicle.
There is an increased risk of skidding and an accident.
X Drive on carefully.
X Visit a qualified specialist workshop immediately.
F(USA
only)
!(Canada
only)
ReleasePark.Brake
You are driving with the parking brake applied. A warning tone also sounds.
X Release the parking brake.
Display messages151
On-board computer and displays
Z

Display messagesPossible causes/consequences andMSolutions
$(USA
only)
J(Canada
only)
Check Brake Fluid
Level
There is not enough brake fluid in the brake fluid reservoir. In
addition, the $(USA only)/ J(Canada only) warning lamp
lights up in the instrument cluster and a warning tone sounds.
GWARNING
The braking effect 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 ( Ypage 110).
X Consult a qualified specialist workshop.
X Do not add brake fluid. This does not correct the malfunction.
6
SRS Malfunction
Service Required
The restraint system is faulty. The 6warning lamp also lights
up in the instrument cluster.
GWARNING
The air bags or Emergency Tensioning Devices may either be trig- gered unintentionally or, in the event of an accident, may not be
triggered.
There is an increased risk of injury.
X Visit a qualified specialist workshop.
For further information about the restraint system, see ( Y page 42).
6
FrontLeftMalfuncZ
tion Service
RequiredorFront
Right Malfunction
Service Required
The front left-hand or right-hand restraint system has malfunc-
tioned. The 6warning lamp also lights up in the instrument
cluster.
GWARNING
The air bags or Emergency Tensioning Devices may either be trig- gered unintentionally or, in the event of an accident, may not be
triggered.
There is an increased risk of injury.
X Visit a qualified specialist workshop.
152Display messages
On-board computer and displays

Display messagesPossible causes/consequences andMSolutions
6
Rear Left MalfuncZ
tion Service
RequiredorRear
Right Malfunction
Service Required
The rear left-hand or right-hand restraint system has malfunc-
tioned. The6warning lamp also lights up in the instrument
cluster.
GWARNING
The air bags or Emergency Tensioning Devices may either be trig- gered unintentionally or, in the event of an accident, may not be
triggered.
There is an increased risk of injury.
X Visit a qualified specialist workshop.
6
Rear Center MalZ
function. Service
Required
The rear center restraint system has malfunctioned. The 6
warning lamp also lights up in the instrument cluster.
GWARNING
The air bags or Emergency Tensioning Devices may either be trig- gered unintentionally or, in the event of an accident, may not be
triggered.
There is an increased risk of injury.
X Visit a qualified specialist workshop.
6
Left Side Curtain
Airbag MalfuncZ
tion. Service
RequiredorSide
CurtainAirbagMalZ
function. Service
Required
There is a malfunction in the left-hand or right-hand window cur-
tain air bag. The 6warning lamp also lights up in the instrument
cluster.
GWARNING
The left or right window curtain air bag may either be triggered
unintentionally or, in the event of an accident, may not be trig-
gered.
There is an increased risk of injury.
X Visit a qualified specialist workshop.
Display messages153
On-board computer and displays
Z