warning light MERCEDES-BENZ G-CLASS SUV 2013 Service Manual

i
You should only select this setting until
the windshield is clear again. Switching the windshield defroster
on/off
G
WARNING
Any accumulation of snow and ice should be
removed from the windshield before driving.
Otherwise, your vision may be impaired,
which could endanger you or others. X
Turn the SmartKey to position
2 (Y page 139) in the ignition lock.
X To switch on: press button 0044.
Indicator lamp 0043 lights up.
X To switch off: press button 0044.
Indicator lamp 0043 goes out.
i At outside temperatures above
50 ‡(10 †), the windshield
heating
cannot
be activated. Indicator lamp 0043 lights up
briefly when you attempt to activate it and
then goes out again.
i The windshield defroster has a high
current draw. You should therefore switch
it off as soon as the windshield is clear. The
windshield heating otherwise switches
itself off automatically after 10 minutes.
i If you turn on the windshield heating for
the fourth consecutive time, the windshield
heating will automatically switch off after
5 minutes.
i If the vehicle's electrical system voltage
is too low because too many electrical consumers are switched on, indicator
lamp
0043 flashes. After approximately
30 seconds, the windshield heating turns
off automatically. Switching the rear window defroster
on/off
Activating/deactivating G
WARNING
Any accumulation of snow and ice should be
removed from the rear

window before driving.
Visibility could otherwise be impaired,
endangering you and others.
X Turn the SmartKey to position
2 (Y page 139) in the ignition lock.
X USA only: press the 0065 button.
The indicator lamp
in

the 0065 button lights
up or goes out.
i The rear window defroster has a high
current draw. You should therefore switch
it off as soon as the rear window is clear.
as it only switches off automatically after
several minutes.
i If the battery voltage is too low, the rear
window defroster may switch off.
Problems with the rear window
defroster If the indicator lamp in the
0065 rear window
defroster button flashes, the on-board
voltage is

too low. The rear window defroster
has deactivated prematurely or cannot be
activated.
X Switch off any consumers that are not
required, e.g. reading lamps or interior
lighting.
When the battery is sufficiently charged,
the rear window defroster is activated
again automatically. Operating the climate control systems
133
Climate control Z

Activating/deactivating air-
recirculation mode
G
WARNING
Fogged windows impair visibility,
endangering you and others. If the windows
begin to fog on the inside, switching off the
air recirculation mode immediately should
clear interior window fogging. If interior
window fogging persists, make sure the air
conditioning is activated, or press the 0064
button.
X Turn the SmartKey to position
2 (Y page 139) in the ignition lock.
X To switch on: press the 0089 button.
The indicator lamp
in
the 0089 button lights
up.
i Air-recirculation mode is automatically
activated at high levels of pollution or at
high outside temperatures. When air-
recirculation mode is activated
automatically, the indicator lamp in the
0089 button is not lit.
Outside air is added after approximately
30 minutes.
X To deactivate: press the 0089 button.
The indicator lamp in

the 0089 button goes
out.
i Air-recirculation mode switches off
automatically:
R after approximately five minutes at
outside temperatures below
approximately 41 ‡
R after approximately five minutes if
cooling with air dehumidification is
deactivated
R after approximately 30 minutes at
outside temperatures above
approximately 41 ‡ (5 †) Activating/deactivating the residual
heat function
The "residual heat" function is only available
in Canada.
It is possible to

make use of the residual heat
of the engine to continue heating the
stationary vehicle for up to 30 minutes after
the engine has been switched off. The heating
time depends on the coolant temperature and
on the interior temperature that has been set.
i The blower will run at a low speed
regardless of the airflow setting.
i If you activate the residual heat function
at high temperatures, only the ventilation
will be activated.
X Turn the SmartKey to position
0(Y page 139) in the ignition lock or
remove it.
X To activate: press the 0056 button.
The indicator lamp
in

the 0056 button lights
up.
X To deactivate: press the 0056 button.
The indicator lamp in

the 0056 button goes
out.
i Residual heat is deactivated
automatically:
R after approximately 30 minutes
R when the ignition is switched on
R if the battery voltage drops
R if the coolant temperature is too low Setting the air vents
Important safety notes
G
WARNING
When operating the climate control, the air
that enters the passenger compartment
through the air vents can be very hot or very
cold (depending on the

set temperature). This
could cause burns or frostbite to unprotected
skin in the immediate area of the air vents. 134
Setting the air vents
Climate control

Make sure that all objects in the vehicle are
stowed correctly, and that they cannot enter
the driver's footwell. Install the floormats
securely and as specified in order to ensure
sufficient clearance for
the
pedals. Do not use
loose floormats. G
WARNING
Unsuitable footwear can hinder correct usage
of the pedals, e.g.:
R shoes with thick soles
R shoes with high heels
R slippers
There is a risk of an accident.
Wear suitable footwear to ensure correct
usage of the pedals. 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. You will require considerably
more effort to steer and brake. There is a risk
of an accident.
Do not switch off the ignition while driving. G
WARNING
If the parking brake has not been fully
released when driving, the

parking brake can:
R overheat and cause a fire
R lose its hold function.
There is a risk of fire and an accident. Release
the parking brake fully before driving off.
! Warm up the engine quickly. Do not use
the engine's full performance until it has
reached operating temperature.
Only shift the automatic transmission to
the desired drive position when the vehicle
is stationary.
Where possible, avoid spinning the drive
wheels when pulling away on slippery
roads. You could otherwise damage the
drive train. !
Avoid high engine speeds when the
engine is cold. The engine's service life
could otherwise be significantly

shortened.
Do not use the engine's full performance
until it has reached operating temperature.
! AMG vehicles: at low engine oil
temperatures below 68 ‡ (+20 †), the
maximum engine speed is restricted in
order to protect the engine. To protect the
engine and maintain smooth engine
operation, avoid driving at full throttle when
the engine is cold. SmartKey positions
005A
To remove the SmartKey
0047 Power supply for some consumers, such
as the windshield wipers
0048 Ignition (power supply for all consumers)
and drive position
0049 To start the engine
As soon as the ignition is switched on, all the
indicator lamps in the

instrument cluster light
up. If an indicator lamp does not go out after
starting the engine or lights up while driving,
see ( Y page 249).
If the SmartKey is in position 0 in the ignition
lock for an extended period of time, it can no
longer be turned in the ignition lock. The
steering is then locked. To unlock, remove the
SmartKey and reinsert it into the ignition lock.
The steering is locked when you remove the
SmartKey from the ignition lock. Driving
139
Driving and parking Z

Problems with the engine
Problem Possible causes/consequences and
0050 SolutionsThe engine does not
start.
The starter
motor
can be heard. R
There is a malfunction in the engine electronics.
R There is a malfunction in the fuel supply.
X Turn the SmartKey back to position 0
in the
ignition lock before
attempting to start the engine again.
X Try to start the engine again (Y page 140). Avoid excessively
long and frequent attempts to start the engine, as this
(Y page 139) will drain the battery.
If the engine does not start after several attempts:
X Consult a qualified specialist workshop. The engine does not
start. The starter
motor
can be heard. The
yellow reserve fuel
warning lamp is lit and
the needle of the fuel
gauge

display shows 0. The fuel tank is empty.
X
Refuel the vehicle. The engine does not
start. You cannot hear
the starter motor. The on-board voltage is too low because the battery is too weak
or discharged.
X
Jump-start the vehicle (Y page 308).
If the engine does not start despite attempts to jump-start it:
X Consult a qualified specialist workshop. The starter motor was exposed to a thermal load that was too high.
X
Allow the starter motor to cool down for approximately two
minutes.
X Try to start the engine again.
If the engine still does not start:
X Consult a qualified specialist workshop. The engine is not
running smoothly and
is misfiring. There is a malfunction in the engine electronics or in a mechanical
component of the engine management system.
X
Only depress the accelerator pedal slightly.
Otherwise, non-combusted fuel may get into the catalytic
converter and damage it.
X Have the cause rectified immediately at a qualified specialist
workshop.144
DrivingDriving and parking

For further information on fuel and fuel quality
(Y page 350).
Refueling
Fuel filler flap Example: G 550 fuel filler cap
0043
To open the fuel filler flap
0044 Tire pressure table
0087 Fuel type
0085 To insert the fuel filler cap
When you open or close the vehicle with the
SmartKey, the fuel filler flap is automatically
unlocked or locked.
The position of the fuel filler cap is displayed
00B6 in the instrument cluster. The arrow
next to the filling pump indicates the side of
the vehicle. The
fuel
filler flap is located to the
rear on the right.
Opening 0043
To open the fuel filler flap
0044 Tire pressure table 0087
Fuel type
0085 To insert the fuel filler cap
X Switch off the engine.
i When the engine is running and the fuel
filler flap is open, the yellow reserve fuel
warning lamp and the 00AD (USA only)
or 00B9 (Canada only) Check Engine
warning lamp may light up.
Further information about warning and
indicator lamps in the instrument cluster
can be found in the Digital Operator's
Manual.
X Remove the SmartKey from the ignition
lock.
X Press the fuel filler flap in the direction of
arrow 0043.
The fuel filler flap opens slightly.
X Open the fuel filler flap.
X Turn the fuel filler cap counterclockwise
and remove it.
X Insert the fuel filler cap into the holder
bracket on the inside of filler flap 0085.
X Completely insert the filler neck of the fuel
pump nozzle into the tank and refuel.
i Do not add any more fuel after the pump
stops filling for the first time. Otherwise,
fuel may leak out.
Closing X
Replace the fuel filler cap and turn it
clockwise. The fuel filler cap audibly
engages.
X Close the fuel filler flap.
i Close the fuel filler

flap before locking the
vehicle. A locking pin otherwise prevents
the fuel filler flap from closing after the
vehicle has been locked. 154
Refueling
Driving and parking

i
When you apply parking
brake 0044 to brake
the vehicle, the brake lamps do not light up.
X To apply: pull parking brake 0044 up firmly.
Parking brake 0044 is applied.
When the ignition is switched on or the
engine is running, the 0049 (USA only) or
004D (Canada only) indicator lamp is lit in
the instrument cluster.
X To release: depress the brake pedal and
keep it depressed.
The selector lever lock is released.
X Pull parking brake 0044 up firmly.
X Press release button 0043 on parking
brake 0044 and move parking

brake 0044 down
to the stop.
When the ignition is switched on or the
engine is running, the 0049 (USA only)
or 0024 (Canada only) indicator lamp goes
out in the instrument cluster.
i If you pull away with parking brake 0044
applied, a warning tone sounds. Parking the vehicle for a long period
If you leave the
vehicle parked for longer than
four weeks, the battery may be damaged by
exhaustive discharge.
X Connecting a trickle charger.
i You can obtain information about trickle
chargers from a qualified specialist
workshop.
If you leave the

vehicle parked for longer than
six weeks, the vehicle may suffer damage as
a result of lack of use.
X Visit a qualified specialist workshop and
seek advice. Driving tips
General driving tips
Important safety notes G
WARNING
Always remember that you must concentrate
primarily on driving the vehicle. The driver's
concentration must always be directed
primarily at road traffic. For your own safety
and that of others, we recommend that you
stop the vehicle at a safe place and in
accordance with the traffic

conditions before
making or accepting a phone call.
Comply with all legal requirements if you use
the telephone while driving. Use the hands-
free system and only use the telephone when
road, weather and traffic conditions permit. In
some jurisdictions, it is forbidden for drivers
to use mobile phones while driving.
Only operate COMAND (Cockpit Management
and Data System) in compliance with all legal
requirements and when the road, weather and
traffic conditions permit. You may otherwise
not be able to observe the traffic conditions,
endangering yourself and others.
Remember that your vehicle covers a distance
of 44 ft (approximately 14 m) a second when
it is traveling at only 30 mph (approximately
50 km/h). 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. You will require considerably
more effort to steer and brake. There is a risk
of an accident.
Do not switch off the ignition while driving. 158
Driving tips
Driving and parking

Never activate the LOW off-road gear while
driving on a slippery road surface.
Downhill gradients !
On long and steep gradients, you must
reduce the load on the brakes by shifting
early to a lower
gear. This allows you to take
advantage of the engine braking effect and
helps avoid overheating and excessive
wear of the brakes.
When you take advantage of the engine
braking effect, a drive wheel may not turn
for some time, e.g. on a slippery road
surface. This could cause damage to the
drive train. This type of damage is not
covered by the Mercedes-Benz warranty.
Heavy and light loads G
WARNING
If you rest your foot on the brake pedal while
driving, the braking system

can overheat. This
increases the stopping distance and can even
cause the braking system to fail. There is a
risk of an accident.
Never use the brake pedal as a footrest. Never
depress the brake pedal and the accelerator
pedal at the same time.
! Depressing the brake pedal constantly
results in excessive and premature wear to
the brake pads.
If the brakes have been subjected to a heavy
load, do not stop the vehicle immediately, but
drive on for a short while. This allows the
airflow to cool the brakes more quickly.
Wet roads If driving in heavy rain for a prolonged period
of time without braking, there may be a
delayed reaction from the brakes when
braking for the
first

time. This may also occur
after the vehicle has been washed. You have to depress the brake pedal more
firmly. Maintain a greater distance from the
vehicle in front.
After driving on a wet road or having the
vehicle washed, brake firmly while paying
attention to the traffic conditions. This will
warm up the brake

discs, thereby drying them
more quickly and protecting them against
corrosion.
Limited braking performance on salt-
treated roads If you drive on salted roads, a layer of salt
residue may form on the brake discs and
brake pads. This can result in a significantly
longer braking distance.
R
Brake occasionally to remove

any possible
salt residue. Make sure that you do not
endanger other road users when doing so.
R Carefully depress the brake pedal and the
beginning and end of a journey.
R Maintain a greater distance to the vehicle
ahead.
Servicing the brakes !
If the brake warning

lamp lights up in the
instrument cluster and you hear a warning
tone even though the parking brake has
been released, the brake fluid level may be
too low. Observe additional warning
messages in the multifunction display.
The brake fluid level may be too low due to
brake pad wear or leaking brake lines.
Have the brake system checked
immediately. This work should be carried
out at a qualified specialist workshop.
! A function or performance test should
only be carried out on a 2-axle
dynamometer. If you are planning to have
the vehicle tested on such a dynamometer,
contact an authorized Mercedes-Benz
Center to obtain further information first.
Otherwise, you could damage the drive
train or the brake system. 160
Driving tips
Driving and parking

The following driving systems are specially
adapted to off-road driving:
R
4ETS ( Y page 62)
R Transfer case (Y page 198)
R Differential locks ( Y page 201)
Observe the following notes:
R stop your vehicle and,
if necessary, shift the
transfer case to LOW
RANGE(Y page 199) before driving off-
road.
R AMG vehicles: to shift the transfer case to
LOW RANGE, deactivate the ECO start/
stop function (Y page 142).
R engage the differential locks, if necessary
(Y page 201)
i ABS, 4ETS, ESP ®
and BAS are deactivated
when the differential locks are activated.
This allows the front wheels to lock briefly,
so that these can dig into a loose surface.
However, please note that locked wheels
skid and can no longer steer.
R Check that items of luggage and loads are
stowed safely and are well secured
(Y page 267).
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 a
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, rear door, side
windows and the sliding sunroof closed
while the vehicle is in motion.
R Switch off cruise control.
R Do not stray from marked routes or paths.
R Adapt your speed to the terrain. The
rougher, steeper or more ruts on the
terrain, the slower your speed should be.
R Drive slowly and at an even speed through
the water. Ensure that a bow wave does not
form as you drive.
R On sand, drive quickly to overcome the
rolling 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
appropriate engine speeds (maximum
3,000 rpm).
R Do not shift the automatic transmission to
transmission position N.
R Always check the vehicle for damage after
off-road driving.
i Information about retrofitting special all-
terrain tires is available from any qualified
specialist workshop.
i Do not use the HOLD function when
driving off-road, on steep uphill or downhill
gradients 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
while the vehicle is in motion, stop the
vehicle in a safe

place as soon as possible.
Check the engine oil level. The engine oil
warning lamp warning must not be ignored.
Continuing the journey while the symbol is
displayed could lead to engine damage. Driving tips
165
Driving and parking Z

0083
To switch between cruise control and
variable SPEEDTRONIC
0084 To deactivate cruise control
X Briefly press the cruise control lever
up 0043 or down 0085 to beyond the pressure
point.
The last speed stored is increased or
reduced.
i Cruise control is not deactivated if you
depress the accelerator pedal. For
example, if you accelerate briefly to
overtake, cruise control adjusts the
vehicle's speed to the last speed stored
after you have finished overtaking.
Deactivating cruise control 0043
To activate or increase speed
0044 LIM indicator lamp
0087 To activate at the current speed/last
stored speed
0085 To activate or reduce speed
0083 To switch between cruise control and
variable SPEEDTRONIC
0084 To deactivate cruise control
There are several ways to deactivate cruise
control:
X Briefly press the cruise control lever
forwards 0084.
or
X Brake. or
X
Briefly press the cruise control lever in the
direction of arrow 0083.
Variable SPEEDTRONIC is selected. LIM
indicator lamp
0044 in
the cruise control lever
lights up.
Cruise control is automatically deactivated if:
R you apply the parking brake.
R you are driving at less than 20 mph
(30 km/h).
R ESP ®
intervenes or you deactivate ESP ®
.
R you shift the transmission to position N
while driving.
i The

last speed stored is cleared when you
switch off the engine. SPEEDTRONIC
Important safety notes G
WARNING
If you rest your foot on the brake pedal while
driving, the braking system

can overheat. This
increases the stopping distance and can even
cause the braking system to fail. There is a
risk of an accident.
Never use the brake pedal as a footrest. Never
depress the brake pedal and the accelerator
pedal at the same time.
! Depressing the brake pedal constantly
results in excessive and premature wear to
the brake pads.
If you fail to adapt your driving style,
SPEEDTRONIC can neither reduce the risk of
accident nor override the laws of physics.
SPEEDTRONIC 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 current road,
weather and traffic conditions permit it to be 174
Driving systems
Driving and parking

If it is on, variable SPEEDTRONIC is already
selected.
If it is not, press the cruise control lever in
the direction of arrow 0083.
LIM indicator lamp
0044
in the cruise control
lever lights up. Variable SPEEDTRONIC is
selected.
Storing the current speed 0043
To activate or increase speed
0044 LIM indicator lamp
0087 To activate at the current speed/last
stored speed
0085 To activate or reduce speed
0083 To switch between cruise control and
variable SPEEDTRONIC
0084 To deactivate cruise control
You can use the cruise control lever to limit
the speed to
any

speed above 18 km/h while
the engine is running.
X Briefly press the cruise control lever
up 0043 or down 0085.
The current speed is stored and shown in
the multifunction display.
i On downhill gradients, the speed can be
exceeded despite variable SPEEDTRONIC.
If this is the case, you will hear a warning
tone and the Limit Exceeded message
appears in the
multifunction

display. Apply
the brakes yourself if required. Calling up the last speed stored Calling up the last speed stored
0043
To activate or increase speed
0044 LIM indicator lamp
0087 To activate at the current speed/last
stored speed
0085 To activate or reduce speed
0083 To switch between cruise control and
variable SPEEDTRONIC
0084 To deactivate cruise control
If you fail to adapt your driving style,
SPEEDTRONIC can neither
reduce

the risk of
accident nor override the laws of physics.
SPEEDTRONIC 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 current road,
weather and traffic conditions permit it to be
done safely. Drive carefully and maintain a
suitable distance to the vehicle in front.
X Briefly pull the cruise control lever towards
you 0087.
i If you call up the stored speed and your
current speed is higher, you will hear a
warning tone. The Limit Exceeded
message appears in the multifunction
display.
i If no speed is stored, variable
SPEEDTRONIC stores the current speed
and maintains it. 176
Driving systems
Driving and parking