engine MERCEDES-BENZ G-CLASS SUV 2015 Service Manual

ATo switch between cruise control and var-
iable SPEEDTRONIC
BTo deactivate variable SPEEDTRONIC
You can operate cruise control and variable
SPEEDTRONIC with the cruise control lever.
The LIM indicator lamp on the cruise control
lever indicates which system you have selec-
ted:
R LIM indicator lamp off: cruise control is
selected.
R LIM indicator lamp on: variable SPEED-
TRONIC is selected.
You can use the cruise control lever to limit
the speed to any speed above 30 km/ hwhile
the engine is running.
Selecting variable SPEEDTRONIC
If you fail to adapt your driving style, SPEED-
TRONIC can neither reduce the risk of acci-
dent nor override the laws of physics. SPEED-
TRONIC cannot take account of road, weather
and traffic conditions. SPEEDTRONIC is only
an aid. You are responsible for the distance to the vehicle in front, for vehicle speed, for
braking in good time and for staying in lane.
Only engage SPEEDTRONIC when the currentroad, weather and traffic conditions permit it
to be done safely. Drive carefully and main-
tain a suitable distance to the vehicle in front.
X Check whether LIM indicator lamp ;is on.
If it is on, variable SPEEDTRONIC is already selected.
If it is not, press the cruise control lever in
the direction of arrow A.
LIM indicator lamp ;in the cruise control
lever lights up. Variable SPEEDTRONIC isselected.
Storing the current speed
You can use the cruise control lever to limit
the speed to any speed above 18 mph while
the engine is running. X
Briefly press the cruise control lever up :
or down ?.
The current speed is stored and shown in
the multifunction display.
iOn downhill gradients, the speed can be
exceeded despite variable SPEEDTRONIC.
In this case, you will hear a warning tone
and the
Limit Exceededmessage will
appear in the multifunction display. If nec-
essary, apply the brakes yourself.
Calling up the last speed stored
Calling up the last speed stored
If you fail to adapt your driving style, SPEED-
TRONIC can neither reduce the risk of acci-
dent nor override the laws of physics. SPEED-
TRONIC cannot take account of road, weather
and traffic conditions. SPEEDTRONIC is only
an aid. You are responsible for the distance to the vehicle in front, for vehicle speed, for
braking in good time and for staying in your
lane. Only activate SPEEDTRONIC when the
prevailing road, weather and traffic condi-
tions permit. Drive carefully and maintain a
suitable distance to the vehicle in front.
X Briefly pull the cruise control lever towards
you =.
iIf you call up the stored speed and your
current speed is higher, you will hear a
warning tone. The
Limit Exceededmes-
sage appears in the multifunction display.
iIf no speed is stored, variable SPEED-
TRONIC stores the current speed and main-
tains it.
116Driving systems
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time and for staying in your lane. Only engage
DISTRONIC PLUS when the current road,
weather and traffic conditions permit it to bedone safely, and adapt your driving style
accordingly. Drive carefully and maintain a
suitable distance to the vehicle in front.
When DISTRONIC PLUS detects a risk of col-
lision with the vehicle in front but is unable to
sufficiently decelerate the vehicle in order to
maintain the set distance from the vehicle in
front, you will be warned visually and acous-
tically. DISTRONIC PLUS cannot prevent a
collision without your intervention. An inter-
mittent warning tone will then sound and the distance warning lamp will light up in the
instrument cluster. Brake immediately in
order to increase the distance from the vehi-
cle in front, or take evasive action, provided it
is safe to do so.
DISTRONIC PLUS may not detect narrow
vehicles driving in front, e.g. motorcycles, or
vehicles driving on a different line. Therefore,
always pay attention to traffic conditions
even when DISTRONIC PLUS is activated.
Otherwise, you may fail to recognize dangers
in time, cause an accident and injure yourself and others.
In particular, the detection of obstacles can
be impaired if:
R the sensor is dirty or covered
R there is snow or heavy rain
R there is interference by other radar sources
R there is the possibility of strong radar
reflections, for example, in parking
garages.
If DISTRONIC PLUS is activated, the vehicle
brakes automatically in certain situations.
This can happen unexpectedly, especially
when towing or in a car wash. There is a risk of an accident. In these or similar situations,
deactivate DISTRONIC PLUS.
If you want DISTRONIC PLUS to assist you,
the following activation conditions must be
fulfilled ( Ypage 119) and the radar sensor
system must be operational.General notes
DISTRONIC PLUS regulates the speed and
automatically helps you maintain the dis-
tance to the vehicle detected in front.
DISTRONIC PLUS brakes automatically so
that the set speed is not exceeded.
On long and steep downhill gradients, espe-
cially if the vehicle is laden or towing a trailer,
you must select shift range 1,2 or 3in good
time. By doing so, you will make use of the
braking effect of the engine. This relieves the load on the brake system and prevents the
brakes from overheating and wearing too
quickly.
If DISTRONIC PLUS detects a slower-moving
vehicle in front, your vehicle is braked in order
to maintain the preset distance to the vehicle in front.
If there is no vehicle in front, DISTRONIC
PLUS operates in the same way as cruise
control in the speed range between 20 mph
(Canada: 30 km/h) and 120 mph (Canada:
200 km/h). If a vehicle is driving in front of
you, it operates in the speed range between
0 mph (0 km/h) and 120 mph (Canada:
200 km/h).
Do not use DISTRONIC PLUS while driving on
roads with steep gradients.
As DISTRONIC PLUS transmits radar waves, it
can resemble the radar detectors of the
responsible authorities. You can refer to the
relevant chapter in the Operator's Manual if
questions are asked about this.
iUSA only:
This device has been approved by the FCC as a "Vehicular Radar System". The radar
sensor is intended for use in an automotive
radar system only. Removing, tampering
with, or altering the device will void any
warranties, and is not permitted by the
FCC. Do not tamper with, alter, or use in
any non-approved way.
Any unauthorized modification to this
device could void the user’s authority to
operate the equipment.
118Driving systems
Driving an d parking

iCanada only: This device complies with
RSS-210 of Industry Canada. Operation is
subject to the following two conditions:
1. This device may not cause harmful inter- ference, and
2. This device must accept any interference
received, including interference that may
cause undesired operation of the device.
Removal, tampering, or altering of the
device will void any warranties, and is not
permitted. Do not tamper with, alter, or use
in any non-approved way.
Any unauthorized modification to this
device could void the user's authority to
operate the equipment.
Information in the Digital Operator's
Manual
In the Digital Operator's Manual you will find
information on the following topics: R Setting a speed
R Setting the specified minimum distance
R DISTRONIC PLUS displays in the instru-
ment cluster
Cruise control lever
:To activate or increase speed
;To set the specified minimum distance
=LIM indicator lamp
?To activate at the current speed/last
stored speed
ATo activate or reduce speed
BTo switch between DISTRONIC PLUS and
variable SPEEDTRONIC
CTo deactivate DISTRONIC PLUS
With the cruise control lever, you can operate
DISTRONIC PLUS and variable SPEED-
TRONIC. X To switch between variable SPEED-
TRONIC and DISTRONIC PLUS: press the
cruise control lever in the direction of arrow B .
LIM indicator lamp =on the cruise control
lever indicates which function you have selec-
ted:
R LIM indicator lamp =
off:DISTRONIC
PLUS is selected.
R LIM indicator lamp =
on:variable
SPEEDTRONIC is selected.
Activating DISTRONIC PLUS
Activation conditions
In order to activate DISTRONIC PLUS, the fol- lowing conditions must be fulfilled:
R the engine must be started. It may take up
to two minutes after pulling away before
DISTRONIC PLUS is operational.
R the parking brake must be released.
R the differential lock must be disengaged.
R ESP ®
must be active, but not intervening.
R the transmission must be in position D.
R the driver's door must be closed when you
shift from Pto Dor your seat belt must be
fastened.
R the front-passenger door and rear doors
must be closed.
R the vehicle must not skid.
R the DISTRONIC PLUS function must be
selected ( Ypage 119).
R the transfer case must be in the HIGH
RANGE transmission position.
Driving systems119
Driving and pa rking
Z

stored. Otherwise, it sets the vehicle cruisespeed to the previously stored value.
Driving with DISTRONIC PLUS
Pulling away and driving
X If the vehicle in front pulls away: remove
your foot from the brake pedal.
X Briefly pull the cruise control lever towards
you ?, or press it up :or down A.
or
X Accelerate briefly.
Your vehicle pulls away and adapts its
speed to that of the vehicle in front.
If there is no vehicle in front, DISTRONIC
PLUS operates in the same way as cruise
control.
If DISTRONIC PLUS detects that the vehicle in front has slowed down, it brakes your vehicle.
In this way, the distance you have selected is maintained.
If DISTRONIC PLUS detects that the vehicle infront is driving faster, it accelerates your vehi-
cle, but only up to the speed you have stored.
If you depress the brake, DISTRONIC PLUS is
deactivated unless your vehicle is stationary.
Changing lanes
If you change to the passing lane, DISTRONIC
PLUS supports you when:
R you are driving faster than 40 mph
(60 km/h)
R DISTRONIC PLUS is maintaining the dis-
tance to a vehicle in front R
you switch on the appropriate turn signal
R DISTRONIC PLUS does not detect a danger
of collision
If these conditions are fulfilled, your vehicle is
accelerated. Acceleration will be interrupted
if changing lanes takes too long or if the dis-
tance between your vehicle and the vehicle in front becomes too small.
iWhen changing lanes, DISTRONIC PLUS
monitors the left lane on left-hand drive
vehicles and the right lane on right-hand
drive vehicles.
Stopping
GWARNING
When leaving the vehicle, even if it is braked
only by DISTRONIC PLUS, it could roll away if: R there is a malfunction in the system or in
the voltage supply.
R DISTRONIC PLUS has been deactivated
with the cruise control lever, e.g. by a vehi-
cle occupant or from outside the vehicle.
R the electrical system in the engine com-
partment, the battery or the fuses have
been tampered with.
R the battery is disconnected.
R the accelerator pedal has been depressed,
e.g. by a vehicle occupant.
There is a risk of an accident.
If you wish to exit the vehicle, always turn off
DISTRONIC PLUS and secure the vehicle
against rolling away.
If DISTRONIC PLUS detects that the vehicle in front is stopping, it brakes your vehicle until it
is stationary.
Once your vehicle is stationary, it remains
stationary and you do not need to depress thebrake.
iDepending on the specified minimum dis-
tance, your vehicle will come to a standstill
at a sufficient distance behind the vehicle in front. The specified minimum distance is
set using the control on the cruise controllever.
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Z

On steep uphill or downhill inclines or if there
is a malfunction, the transmission may also
automatically be shifted into positionP.
Deactivating DISTRONIC PLUS
There are several ways to deactivate
DISTRONIC PLUS:
X Briefly press the cruise control lever for-wards :.
or
X Brake, unless the vehicle is stationary
or X Briefly press the cruise control lever in the
direction of arrow =.
Variable SPEEDTRONIC is selected. LIM
indicator lamp ;in the cruise control lever
lights up.
When you deactivate DISTRONIC PLUS, you
will see the
DISTRONICPLUSOffmessage in
the multifunction display for approximately
five seconds.
iThe last speed stored remains stored until
you switch off the engine.
DISTRONIC PLUS is automatically deactiva-
ted if:
R you engage the parking brake
R you are driving slower than 15 mph
(25 km/h) and there is no vehicle in front,
or if the vehicle in front is no longer detec-
ted
R ESP ®
intervenes or you deactivate ESP ®
R the transmission is in the P,R or Nposition R
you pull the cruise control lever towards
you in order to pull away and the front-
passenger door or one of the rear doors isopen
R the vehicle has skidded
If DISTRONIC PLUS is deactivated, you will
hear a warning tone. You will see the
DISTRONIC PLUS Offmessage in the multi-
function display for approximately five sec- onds.
In the Assistance menu ( Ypage 147) of the
on-board computer, you can select the dis-
tance display.
Tips for driving with DISTRONIC PLUS
General notes
The following contains descriptions of certain
road and traffic conditions in which you must be particularly attentive. In such situations,
brake if necessary. DISTRONIC PLUS is thendeactivated.
Cornering, going into and coming out of a
bend
The ability of DISTRONIC PLUS to detect vehi- cles when cornering is limited. Your vehicle
may brake unexpectedly or late.
122Driving systems
Driving and parking

If a vehicle is detected in the monitoring range
of Blind Spot Assist and you switch on the
corresponding turn signal, a double warning
tone sounds. Red warning lamp :flashes. If
the turn signal remains on, vehicles detected
are indicated by the flashing of red warninglamp :. There are no further warning tones.
Switching on Blind Spot Assist
:Yellow indicator lamp/red warning lamp
X Make sure that Blind Spot Assist is activa-
ted in the on-board computer(Y page 147).
X Turn the SmartKey to position 2in the igni-
tion lock ( Ypage 103).
Warning lamps :in the exterior mirrors
light up red for approximately 1.5 seconds
and then turn yellow.
HOLD function
General notes
The HOLD function can assist the driver in the
following situations: R when pulling away, especially on steep
slopes
R when maneuvering on steep slopes
R when waiting in traffic
The vehicle is kept stationary without the
driver having to depress the brake pedal.
The braking effect is canceled and the HOLD
function deactivated when you depress the
accelerator pedal to pull away.
iDo not use the HOLD function when driv-
ing off-road, on steep uphill or downhill gra- dients or on slippery or loose surfaces. The
HOLD function cannot hold the vehicle on
such surfaces.
Activation conditions
You can activate the HOLD function if: R the vehicle is stationary.
R the engine is running or it has been
switched off by the ECO start/stop func-
tion (AMG vehicles).
R the engine is running.
R the driver's door is closed or your seat belt
is fastened.
R the transmission is in position D,R or N.
R DISTRONIC PLUS is deactivated.
Activating the HOLD function
The vehicle's brakes are applied when the
HOLD function is activated. For this reason,
deactivate the HOLD function while in the car
wash or while towing.
X Make sure that the activation conditions
are met.
X Depress the brake pedal.
X Quickly depress the brake pedal furtheruntil ë appears in the multifunction dis-
play.
The HOLD function is activated. You can
release the brake pedal.
iIf depressing the brake pedal the first
time does not activate the HOLD function,
wait briefly and then try again.
126Driving systems
Driving and parking

Deactivating the HOLD function
GWARNING
When leaving the vehicle, it can still roll awaydespite being braked by the HOLD function if:
R there is a malfunction in the system or in
the voltage supply.
R the HOLD function has been deactivated by
pressing the accelerator pedal or the brake
pedal, e.g. by a vehicle occupant.
R the electrical system in the engine com-
partment, the battery or the fuses have
been tampered with.
R the battery is disconnected
There is a risk of an accident.
If you wish to exit the vehicle, always turn off the HOLD function and secure the vehicle
against rolling away.
The HOLD function is deactivated automati-
cally if: R you accelerate and the transmission is in
position Dor R.
R you shift the transmission to position P.
R you depress the brake pedal again with a
certain amount of pressure until ëdis-
appears from the multifunction display.
R you activate DISTRONIC PLUS.
On steep uphill or downhill gradients or if
there is a malfunction, the transmission may
also be automatically shifted into position P.
Permanent all-wheel drive
!
Never tow the vehicle with one axle
raised. This may damage the transfer case. Damage of this sort is not covered by the
Mercedes-Benz Limited Warranty. All
wheels must remain either on the ground or
be fully raised. Observe the instructions for
towing the vehicle with all wheels in full
contact with the ground.
!When testing the parking brake, operate
the vehicle only briefly (for a maximum of ten seconds) on a brake test dynamometer.
When doing this, turn the SmartKey to posi-
tion 0or 1in the ignition. Failure to do this
can cause damage to the drive train or the brake system.
!A function or performance test should
only be carried out on a two-axle dyna-
mometer. Before you operate the vehicle
on such a dynamometer, please consult a
qualified workshop. You could otherwise
damage the drive train or the brake system.
The all-wheel drive system ensures that all
four wheels are permanently driven. The all-
wheel drive system improves vehicle traction together with ESP ®
and 4ETS if a drive wheel
spins due to insufficient grip.
If a drive wheel spins due to insufficient grip: R Only depress the accelerator pedal as far as
necessary when pulling away.
R Take your foot off the accelerator, slowly,
while the vehicle is in motion.
The permanent all-wheel drive system can
neither reduce the risk of accident nor over-
ride the laws of physics if you fail to adapt
your driving style or if you are inattentive. The
all-wheel drive system cannot take into
account road, weather or traffic conditions.
The all-wheel drive system is only an aid. You
are responsible for maintaining a safe dis-
tance to the vehicle in front, for vehicle speed, for braking in good time and for staying in
lane.
In wintry driving conditions, always use winter
tires (M+S tires) and if necessary, snow
chains ( Ypage 232). Only in this way can the
maximum effect of all-wheel drive be ach-
ieved.
For information on driving off-road, see the
Digital Operator's Manual.
Driving syste ms127
Driving and parking
Z

Front sensors
CenterApprox. 40 in (approx.
100 cm from the brush
guard)
CornersApprox. 24 in (approx.
60 cm)
Rear sensors
CenterApprox. 36 in (90 cm) from
the spare wheel
CornersApprox. 32 in (approx.
80 cm)
Minimum distance
CenterApprox. 8 in (approx.
20 cm)
CornersApprox. 8 in (approx.
20 cm)
If there is an obstacle within this range, the
relevant warning displays light up and a warn- ing tone sounds. If the distance falls below
the minimum, the distance may no longer be
shown.
Warning displays
Warning display for the front area :
Segments on the left-hand side of the
vehicle
;Segments on the right-hand side of the
vehicle
=Segments showing operational readiness The warning displays show the distance
between the sensors and the obstacle. The
warning display for the front area is located
on the dashboard above the center air vents.
The warning display for the rear area is loca-
ted on the headliner in the rear compartment.
The warning display for each side of the vehi-
cle is divided into five yellow and two red seg- ments. PARKTRONIC is operational if yellow
segments showing operational readiness =
light up.
The selected transmission position and the
direction in which the vehicle is rolling deter-
mine which warning display is active when the engine is running.
Transmission
positionWarning display
DFront area activated
R ,N or the vehicle
is rolling back- wardsRear and front areas
activated
PNo areas activated
One or more segments light up as the vehicle
approaches an obstacle, depending on the
vehicle's distance from the obstacle.
From the:
R sixth segment onwards, you will hear an
intermittent warning tone for approx-
imately two seconds.
R seventh segment onwards, you will hear a
warning tone for approximately two sec-
onds. This indicates that you have now
reached the minimum distance.
Driving systems129
Driving and pa rking
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Activating/deactivating the rear view
camera
:Rear view camera
XTo activate: make sure that the SmartKey
is in position 2in the ignition lock.
X Make sure that the rear view camera func-
tion is selected in COMAND (see the sepa-
rate operating instructions for COMAND).
X Engage reverse gear.
The area behind the vehicle is shown in the
COMAND display.
To deactivate: the rear view camera is deac-
tivated if you:
R shift the transmission to position P
R drive forward ten meters
R shift the transmission from Rto another
position after 15 seconds
R drive forwards at a speed of over 5 mph
(10 km/h)
Off-road driving systems
Transfer case
General notes
The vehicle has permanent all-wheel drive.
Power is always transmitted to both axles.
For more information on driving off-road, see the Digital Operator's Manual.
Shift ranges
GWARNING
If you do not wait for the transfer case gear
change process to complete, the transfer
case could remain in the neutral position. The power transmission to the driven wheels is
then interrupted. There is a danger of the
vehicle rolling away unintentionally. There is a
risk of an accident.
Wait until the transfer case shift process is
completed.
Do not switch off the engine while changing
gear and do not shift the automatic transmis-
sion to another gear.
HIGH
RANGEPosition for all normal on-
road driving conditions
LOW
RANGELow-range position for driv-
ing off-road.
Also for use on steep uphill
or downhill gradients, espe-
cially when towing a trailer.
The vehicle travels around
half the speed of on-road
driving range HIGH RANGE .
The tractive power is corre-
spondingly higher.
Shifting the transfer case
Important safety notes
GWARNING
When the transfer case is in the neutral posi-
tion, power transmission to the driven wheels
132Off-road driving systems
Driving and pa rking

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