ECU MERCEDES-BENZ G-CLASS SUV 2012 Owner's Manual

AdBlue
®
may leak ou tas a result of overfilling.
Mercedes-Benz offers a special disposable
hose with overfill protection. You can obtain
this from any Mercedes-Benz Service Centre.
AdBlue ®
is available in a variety of containers
and receptacles. Only use the disposable
hose with Mercedes-Benz AdBlue ®
refill can-
isters. X
Unscrew the cap from the opening on top
of AdBlue ®
refill canister :.
X Place disposable hose ;on the opening
of AdBlue ®
refill canister :and screw it
on clockwise until hand-tight.
i Disposable hose ;remains closed until
you fasten disposable hose ;to the
AdBlue ®
filler neck of the vehicle.
X Place disposable hose ;on the filler neck
of the vehicle and screw it on clockwise
until hand-tight. When you feel resistance,
disposable hose ;is sufficiently secured.
X Lift up and tip AdBlue ®
refill canister :.
i Filling stops when the AdBlue ®
tank is
completely filled. Do not fill the AdBlue ®
tank any further. AdBlue ®
refill canis-
ter :can be removed when it has been
only partially emptied.
X Turn disposable hose ;on the filler neck
of the vehicle anti-clockwise and remove it. X
Turn disposable hose ;on the opening of
AdBlue ®
refill canister :anti-clockwise
and remove it.
X Reseal AdBlue ®
refill canister :with the
cap.
AdBlue ®
refill bottle !
Screw on the AdBlue ®
refill bottle only
hand-tight. It may otherwise be destroyed. AdBlue
®
refill bottles can be obtained at many
filling stations or at aMercedes-BenzS ervice
Centre. Refill bottles without a threaded seal
offer no protection against overfilling.
AdBlue ®
may leak out as a result of overfilling.
Mercedes Benzo ffers special refill bottles
with a threaded cap. These are available at
any Mercedes-Benz Service Centre.
X Unscrew the protective cap from AdBlue ®
refill bottle :.
X Set AdBlue ®
refill bottle :as show nonthe
filler neck and screw it on hand-tight.
X Press AdBlue ®
refill bottle :towards the
filler neck.
The AdBlue ®
tank is filled. This could last
up to one minute.
i When the AdBlue ®
refill bottle is no longer
pressed down, filling stops. The bottle may
be taken off again after being only partially
emptied.
X Release AdBlue ®
refill bottle :.162
RefuellingDriving and parking

X
Turn AdBlue ®
refill bottle :anti-clockwise
and remove it.
X Screw the protective cap onto AdBlue ®
refill bottle :again.
Closing the AdBlue ®
filler cap and fuel
filler flap X
Fit blue AdBlue ®
filler cap ;on the filler
neck and turn it clockwise.
X To close the fuel filler flap, press it in the
direction of arrow :.
i The Refill AdBlue See Owner's Man‐
ual message goes out at the latest after
a driving distance of several kilometres.
i Have the AdBlue ®
supply topped up fully
if necessary. Mercedes-Benz recommends
that you use a qualified specialist workshop
for this purpose. Parking
Important safety notes
G
WARNING
If you leave children unsupervised in the vehi-
cle, they could set it in motion by, for example:
R releasing the parking brake
R shifting the automatic transmission out of
the parking position P
R starting the engine.
They could also operate the vehicle's equip-
ment.T here is a risk of an accident and injury. When leaving the vehicle, always take the key
with you and lock the vehicle. Never leave
children unsupervised in the vehicle.
G
WARNING
If flammable materials such as leaves, grass
or twigs are exposed to prolonged contact to
parts of the exhaust system that heat up, they
could ignite. There is a risk of fire.
Park the vehicle so that no flammable mate-
rials come into contact with parts of the vehi-
cle which are hot. Take particular care not to
park on dry grassland or harvested grain
fields. G
WARNING
If you switch off the ignition while driving,
safety-relevant functions are only available
with limitations, or not at all. This could affect,
for example, the power steering and the brake
boosting effect.Y ou will require considerably
more effort to steer and brake. There is a risk
of an accident.
Do not switch off the ignition while driving.
To ensure that the vehicle is secured against
rolling away unintentionally:
R the parking brake must be applied.
R the transmission must be in position Pand
the key must be removed from the ignition
lock
R the transfer case must not be in position
N.
R on uphill or downhill gradients, turn the
front wheels towards the kerb. Switching off the engine
Important safety notes G
WARNING
If you switch off the ignition while driving,
safety-relevant functions are only available
with limitations, or not at all. This could affect,
for example, the power steering and the brake Parking
163Driving and parking
Z

R
Chec kthat items of luggage and loads are
stowed safely and are well secured
(Y page 271).
R To avoid damaging the vehicle, make sure
there is always sufficient ground clearance.
R Always keep the engine running and in gear
when driving on a downhill gradient.
R Always keep the engine running and in gear
when driving on a slope.
R Drive slowly and evenly, if necessary at
walking pace.
R Ensure that the wheels are in contact with
the ground at all times.
R Drive with extreme care on unknown off-
road routes where visibility is poor. For
safety reasons, get out of the vehicle first
and survey the off-road route.
R Check the depth of water before fording
rivers and streams.
R When fording, do not stop and do not
switch off the engine.
R Look out for obstacles such as rocks, holes,
tree stumps and furrows.
R Always keep the doors, the rear door or
tailgate (G-Class Cabriolet), the side win-
dows and the sliding sunroof closed while
the vehicle is in motion.
R Switch off cruise control and variable
SPEEDTRONIC.
R Do not stray from marked routes or paths.
R Adapt your speed to the terrain. The
rougher, steeper or more ruts on the ter-
rain, the slower your speed should be.
R Drive slowly and at a constant speed
through the water. Ensure that a bow wave
does not form as you drive.
R On sand, drive quickly to overcome the roll-
ing resistance. Otherwise, the vehicle could
dig itself into the sand.
R Do not jump with the vehicle as this will
interrupt the vehicle's propulsion. R
Avoid high engine speeds. Drive at appro-
priate engine speeds.
R Always check the vehicle for damage after
off-road driving.
i Information about retrofitting special all-
terrain tyres is available from any qualified
specialist workshop.
i Do 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.
Checklist before driving off-road !
If the engine oil warning lamp lights up
during the journey, stop the vehicle in a
safe place as soon as is possible. Check the
engine oil level. The warning given by the
engine oil warning light must not be
ignored. Continuing your journey when the
symbol is shown may result in engine dam-
age.
X Engine oil level: check the engine oil and
top it up if necessary.
Only then does the engine receive enough
oil when the vehicle is standing on a steep
incline.
X G3 50 BlueTEC: have the AdBlue ®
level
checked at a qualified specialist workshop
(Y page 160).
X Tyre-change tool kit: check that the jack
is working and make sure you have the
wheelbrace, a robust tow cable and a fold-
ing spade in the vehicle.
X Wheels and tyres: check the tyre tread
depth and tyre pressure.
X Check for damage and remove any foreign
objects, e.g. small stones, from the
wheels/tyres.
X Replace any missing valve caps.
X Replace dented or damaged wheels.
X Carry a sound spare wheel. 170
Driving tipsDriving and parking

R
you switch on the respective tur nsignals.
R DISTRONIC PLUS does not detect a danger
of collision.
If these conditions are met, 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.
i When changing lanes, DISTRONIC PLUS
monitors the left lane for left-hand-drive
vehicles and the right lane for right-hand-
drive vehicles.
Stopping G
WARNING
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 fro moutside 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 accelerato rpedal 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 fron tis stopping, it brakes your vehicle until
it is stationary.
Once your vehicle is stationary, it remains
stationary and you do not need to depress the
brake.
i Depending on the specified minimum dis-
tance, your vehicle will come to a standstill
at a sufficient distance behind the vehicle
in front.T he specified minimum distance is
set using the control on the cruise control
lever. On steep uphill or downhill gradients or if
there is a malfunction, the transmission may
also be automatically shifted into position
P.
Displays in the instrument cluster Displays in the speedometer
Example: DISTRONIC PLUS displays in the speed-
ometer
When DISTRONIC PLUS is activated, one or
two segments
;in the set speed range light
up.
If DISTRONIC PLUS detectsav ehicle in front,
segments ;between speed of the vehicle in
front :and stored speed =light up.
i For design reasons, the speed displayed
in the speedometer may differ slightly from
the speed set for DISTRONIC PLUS. 186
Driving systemsDriving and parking

There is a risk of an accident.
Before leaving the vehicle, always deactivate
the HOLD function and secure the vehicle
from 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.4MATIC (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 implied 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 key to position
0 or 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 atwin-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.
4MATIC ensures that all four wheels are per-
manently driven. Together with ESP ®
and
4ETS, it improves the traction of your vehicle whenever a drive wheel spins due to insuffi-
cient grip.
If a drive wheel spins due to insufficient grip:
R
when pulling away, only depress the accel-
erator pedal as far as is necessary.
R accelerate less when driving.
If you fail to adapt your driving style, 4MATIC
can neither reduce the risk of accident nor
override the laws of physics. 4MATIC cannot
take account of road, weather and traffic con-
ditions. 4MATIC 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
4MATIC when the current road, weather and
traffic conditions permit it to be done safely,
and adapt your driving style accordingly.
Drive carefully and maintain a suitable dis-
tance to the vehicle in front.
i In wintry driving conditions, the maximum
effect of 4MATIC can only be achieved if
you use winter tyres (M+ Styres), with snow
chains if necessary.
Fo rinformation abou tdriving off-road, see
(Y page 169). PARKTRONIC
Important safety notes !
When parking, pay particular attention to
objects above or below the sensors, such
as flower pots or trailer drawbars .PARK-
TRONIC does not detect such objects when
they are in the immediate vicinity of the
vehicle. You could damage the vehicle or
the objects.
The sensors may not detect snow and
objects which absorb ultrasoni csources.
Ultrasonic sources, such as an automatic
car wash, a lorry's compressed-air brakes
or a pneumatic drill, could cause PARK-
TRONIC to malfunction.
PARKTRONIC may not function correctly on
uneven terrain. Driving systems
197Driving and parking Z

HIGH
RANGE
Position for all normal on-
road driving conditions
LOW
RANGE
Low-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
halft
he speed of on-road
driving range HIGH RANGE.
The tractive power is corre-
spondingly higher. Shifting the transfer case
Important safety notes
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. 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.
Always wait for the gear change process from
HIGH RANGE toLOW RANGE and from
LOW RANGE toHIGH RANGE to complete.
Do not turn off the engine while changing gear
and do not shift the automatic transmission
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 at less than 40 km/h.
You could otherwise damage the transfer
case. i
AMG vehicles: to shift the transfer case
to LOW RANGE, deactivate the ECO start/
stop function (Y page 146).202
Off-road driving systemsDriving and parking

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

Towing
atrailer Notes on towing
atrailer
Important safety notes G
WARNING
The braking syste mcan overheat if you leave
your foo tonthe brake pedal while driving.
This increases the braking distance and could
even cause the braking system to fail. There
is a risk of an accident.
Never use the brake pedal as a footrest.Do
not simultaneously depress both the brake
pedal and the accelerato rpedal while driving. G
WARNING
You could lose control of the vehicle/trailer
combination if it begins to swerve. The vehi-
cle/trailer combination could even overturn.
There is a risk of an accident.
On no account should you attempt to
straighten out the vehicle/trailer combina-
tion by increasing speed. Decrease your
speed and do not countersteer. Brake if nec-
essary. G
WARNING
If the ball coupling has not been correctly fit-
ted and has not been secured with the bolt
supplied and the correspondin gspring cotter,
the trailer can detach. There is a risk of an
accident.
Always fit and secure the ball coupling as
described. Before beginning each journey,
make sure that the fitted ball coupling is
secured with the bolt supplied and the corre-
sponding spring cotter.
You will find the applicable permissible val-
ues, which must not be exceeded, in the vehi-
cle documents. You will find the values
approved by the manufacturer on the vehicle
identification plates and those for the towing
vehicle in the "Technical data" section
(Y page 340). Couple and uncouple the trailer carefully. If
you do not couple the trailer to the towing
vehicle correctly, the trailer could become
detached.
Make sure that the following values are not
exceeded:
R the permissible trailer drawbar noseweight
R the permissible trailer load
R the permissible rear axle load of the towing
vehicle
R the maximum permissible gross vehicle
weight of both the towing vehicle and the
trailer
When towing a trailer, your vehicle's handling
characteristics will be differen tincomparison
to when driving without a trailer.
The vehicle/trailer combination:
R is heavier
R is restricted in its acceleration and gradi-
ent-climbing capability
R has an increased braking distance
R is affected more by strong crosswinds
R demands more sensitive steering
R has a larger turning circle
This can impair the vehicle's handling char-
acteristics.
When towing a trailer, always adjust your
speed to the current road and weather con-
ditions. Do not exceed the maximum permis-
sible speed for your vehicle/trailer combina-
tion.
General notes !
Use a drawbar noseweight as close to the
maximum permissible noseweight as pos-
sible. Do not use a noseweight of less than
80 kg; otherwise, the trailer may come
loose.
Note that the payload and the rear axle load
are reduced by the actual payload.
i When towing a trailer, set the tyre pres-
sure on the rear axle of the towing vehicle 206
Towing
atrailerDriving an d parking

Trailer power supply
! You can connect accessories with a max-
imum power consumption of 180 W to the
permanent powe rsupply.
You must no tcharge a trailer battery using
the power supply.
The trailer socket of your vehicle is equipped
at the factory with apermanen tpower supply.
The permanent power supply is supplied via
trailer socket pin 9.
You can find more information about fitting
the trailer electrics at a qualified specialist
workshop. Trailer with 7-pin connector
General notes You can make a connection to the 13-pin
socket on the ball coupling using an adapter
or, if necessary, an adapter cable. Both can
be obtained at a qualified specialist work-
shop.
Fitting the adapter !
Make sure that there is sufficient cable
play so that the cable cannot become
detached when cornering. X
Open the socket cover.
X Insert the connector with lug :into
groove ;on the socket and turn the con-
nector clockwise to the stop. X
Let the cover engage.
X If you are using an adapter cable, secure
the cable to the trailer with cable ties.
i When the socket is connected, the ultra-
sonic reversing aid is deactivated. 208
Towing
atrailerDriving an d parking

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