2011 MERCEDES-BENZ G550 lights

Setting the airflowXTurn the key to position 2 in the ignition
lock.XPress the à button.
The indicator lamp in the à button goes
out.XTo increase/reduce: turn
thumbwheel : clockwise or counter-
clockwise ( Y page 107).
i
The airflow from the rear-compartment
vents and the center vents is the same.
Defrosting the windshield
You can use this function to defrost the
windshield or to defrost the inside of the
windshield and the side windows.
i You should only select the defrosting
function until the windshield is clear again.
i When you switch on the "defrosting"
function using the ¥7
or z 8
button,
you cannot adjust any of the other settings.
XTurn the key to position 2 in the ignition
lock.XTo switch on: press the ¥7
or z 8
button.
The indicator lamp in the ¥7
or z 8
button comes on.
The climate control system switches to the
following functions:
R cooling with air dehumidification on
R high airflow
R high temperature
R air distribution to the windshield and
front side windows
R air-recirculation mode off
i If necessary, also activate the windshield
defroster ( Y page 110).
XTo deactivate: press the ¥7
or z 8
button.
The indicator lamp in the ¥7
or z 8
button goes off. The previously selected
settings come into effect again.
or
XPress the à button.
The indicator lamp in the à button lights
up. The indicator lamp in the z button
goes out. Airflow and air distribution are set
to automatic mode.
Defrosting the windows
Windows fogged up on the inside
XActivate the "defrosting" function.XIf necessary, activate the windshield
defroster ( Y page 110).
i
You should only select this setting until
the windshield is clear again.
Windows fogged up on the outside
XSwitch on the windshield wipers.XClose the center air vents.
When automatic air distribution is switched
off:
XTurn the air distribution thumbwheel to the
O or P symbol.
i
You should only select this setting until
the windshield is clear again.
XIf necessary, activate the windshield
defroster ( Y page 110).
Activating/deactivating windshield
heating
GWarning
Any accumulation of snow and ice should be
removed from the windshield before driving.
7 USA only.
8 Canada only.110Operating the climate control systemClimate control

Otherwise, your vision may be impaired,
which could endanger you or others.
i At outside temperatures over
50 ‡ (10 †) the windshield defroster
cannot be switched on. Indicator lamp ;
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 defroster switches off
automatically after ten minutes.
i If you switch on the windshield defroster
four times in a row, it switches off
automatically after five minutes.
i If too many electrical consumers are
switched on simultaneously and the
battery voltage is too low, indicator
lamp ; flashes in windshield defroster
switch :. After about 30 seconds the
windshield defroster switches off.
XTurn the key to position 2 in the ignition
lock.XPress button : on the windshield
defroster.
Indicator lamp ; lights up or goes out.Switching the rear window defroster
on/off
Activating/deactivatingGWarning
Any accumulation of snow and ice should be
removed from the rear window before driving.
Visibility could otherwise be impaired,
endangering you and others.
The rear window defroster has a high current
draw. You should therefore switch it off as
soon as the window is clear as it only switches
off automatically after several minutes.
If the battery voltage is too low, the rear
window defroster may switch off.
XTurn the key to position 2 in the ignition
lock.XTo switch on, press the ª9
or | 10
button.
The indicator lamp in the ª9
or | 10
button goes off.
Problems with the rear window
defroster
When the indicator lamp in the ª rear
window defroster button flashes, the on-
board voltage is too low. The rear window
defroster has deactivated itself prematurely
or cannot be activated.
XSwitch 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.
Activating/deactivating air-
recirculation mode
You can deactivate the flow of fresh air if
unpleasant odors are entering the vehicle
9 USA only.
10 Canada only.Operating the climate control system111Climate controlZ

from outside. The air already inside the
vehicle will then be recirculated.GWarning!
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 button
z or ¥ .
XTurn the key to position 2 in the ignition
lock.XTo switch on: press the g button.
The indicator lamp in the g button lights
up.
i Air-recirculation mode is activated
automatically at high outside
temperatures. When air-recirculation mode
is activated automatically, the indicator
lamp in the g button is not lit.
Outside air is added after about 30
minutes.
XTo switch off: press the g button.
The indicator lamp in the g button goes
out.
i Air-recirculation mode switches off
automatically:
R after approximately five minutes if
outside temperatures are less than about
41 ‡ (5 †)
R after approximately five minutes if
cooling with air dehumidification is
deactivated
R after approximately 30 minutes if outside
temperatures are over about
41 ‡ (5 †)
Activating/deactivating the residual
heat function
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.XTurn the key to position 0 in the ignition
lock or remove it.XTo activate: press the Á button.
The indicator lamp in the Á button lights
up.XTo switch off: press the Á button.
The indicator lamp in the Á button goes
out.
i Residual heat is deactivated
automatically:
R after about 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
GWarning
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.
Always keep sufficient distance between
unprotected parts of the body and the air
vents. If necessary, use the air distribution
adjustment to direct the air to air vents in the
vehicle interior that are not in the immediate
area of unprotected skin.
112Setting the air ventsClimate control

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.
SmartKey positions
gTo remove the SmartKey1Power supply for some consumers, such
as the windshield wipers2Ignition (power supply for all consumers)
and drive position3To start the engine
i You can only remove the SmartKey if:
R the SmartKey is in position 0 in the
ignition lock.
R the automatic transmission selector
lever is in P.
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
the engine is started or if it lights up while the
vehicle is in motion, see ( Y page 183).
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.XRemove the SmartKey when the engine is
switched off.
The starter battery could otherwise be
discharged.
If you cannot turn the SmartKey in the ignition
lock, the starter battery may not be charged
sufficiently.
XCheck the starter battery and charge if
necessary ( Y page 236).
or
XJump-start the vehicle ( Y page 238).
Starting the engine
Important safety notes
GWarning
Inhalation of exhaust gas is hazardous to your
health. All exhaust gas contains carbon
monoxide (CO), and inhaling it can cause
unconsciousness and possible death.
Do not run the engine in confined areas (such
as a garage) which are not properly ventilated.
If you think that exhaust gas fumes are
entering the vehicle while driving, have the
cause determined and corrected
immediately. If you must drive under these
conditions, drive only with at least one
window fully open at all times.
! Do not depress the accelerator pedal
when starting the engine.
Starting procedure
XShift the automatic transmission to
position P.
The transmission position display in the
multifunction display shows P.Driving117Driving and parkingZ

locks, vehicle steerability is severely
restricted.
For your own safety, the safety of others, and
in order to avoid damage to the vehicle, the
differential locks must not be engaged when
driving on a firm road surface. Keep in mind
that when driving on firm road surfaces, the
unimpeded function of the differential is
necessary and must never be locked on firm
road surfaces. Vehicle steerability may
otherwise be lost and you may no longer be
able to steer the vehicle. For this reason, the
differential locks must be engaged
exclusively during off-road driving, and only
when activating the other driving systems
(4ETS, ESP ®
and off-road gear LOW) is no
longer sufficient.
Activating the differential lock
General notes
GWarning!
Never drive on firm road surfaces with
differential locks engaged. Never drive on
narrow bends with front-axle differential locks
engaged. With differential locks engaged, the
vehicle's ability to steer is severely restricted
and the danger of accidents is therefore
higher.
Do not engage or disengage differential locks
while driving on a bend. The vehicle may
otherwise make a jerking movement. You
could thus lose control of the vehicle and
cause an accident.
If you select a differential lock, ABS, 4ETS,
ESP ®
and BAS will be deactivated.
Activate the differential locks:
R off-road
R to deactivate ABS, 4ETS, ESP ®
and BAS
while off-road
R when fording
R on snow-covered, icy or dirty road surfaces
For further information on driving off-road,
see ( Y page 142).
The switches are located on the center
console.:Function indicator lamps (red);Differential lock for the front axle=Differential lock for the transfer case?Differential lock for the rear axleAActivation indicator lamps (yellow)
! Only activate 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.
i You can only engage the differential locks
when the transfer case is in off-road gear
LOW (Y page 126).
i You can activate the differential locks in
the following order =, ? , ; .
Differential lock for the transfer case
XTo engage: switch the transfer case to off-
road gear LOW(Y page 126).XPress switch =.
The yellow activation indicator lamp under
switch = lights up when the transfer case
is in off-road gear LOW.
The å warning lamp in the instrument
panel lights up.
The red function indicator lamp above
switch = lights up when the differential is
locked.
In the multifunction display you see the:130Automatic transmissionDriving and parking

ABS not available Differential
Locked message.
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
gently for optimum traction.
i You can now engage differential lock for
the rear axle ? and differential lock for the
front axle ; as desired.
Differential lock for the rear axle
XTo engage: press switch ?.
First, the yellow activation indicator lamp
lights up, followed by the red function
indicator lamp.
The differential lock for the rear axle is
engaged.
Differential lock for the front axle
XTo engage: press switch ;.
First, the yellow activation indicator lamp
lights up, followed by the red function
indicator lamp.
The differential lock for the front axle is
engaged.
Deactivating the differential lock
You can deactivate the differential locks in
the reverse order: ;, ? , = .
XTo simultaneously deactivate all
differential locks: press switch =.
Yellow activation indicator lamps A go
out. Red function indicator lamps : go out
once the differential locks have
disengaged.
After approximately three seconds of
normal driving, ABS, 4ETS, ESP ®
and BAS
are activated.
The ABS not available Differential
Locked message disappears from themultifunction display and the å, !
and ÷ warning lamps in the instrument
cluster go out.XSwitch the transfer case to road gear
HIGH (Y page 126).
i
If red function indicator lamps : do not
go out when you disengage the differential
locks, bring the vehicle to a stop in
accordance with the traffic conditions,
then begin driving again. The load change
can disengage the differential locks.
GWarning!
Always remember to disengage the
differential locks when returning to drive on
paved roads, see “A few words about
differentials and differential locks”.
Refueling
Important safety notes
GWarning
Gasoline is highly flammable and poisonous.
It burns violently and can cause serious
personal injury.
Never allow sparks, flames or smoking
materials near gasoline.
Turn off the engine before refueling.
Whenever you are around gasoline, avoid
inhaling fumes and any skin or clothing
contact.
Direct skin contact with fuels and the
inhalation of fuel vapors are damaging to your
health.
GWarning
Overfilling of the fuel tank may create
pressure in the system which could cause a
gas discharge. This could cause the gasoline
to spray back out when removing the fuel
pump nozzle, which could cause personal
injury.
Refueling131Driving and parkingZ

Rturn the SmartKey in the ignition lock to
position 0 and remove the SmartKey from
the ignition lock.
R take the SmartKey with you and lock the
vehicle when leaving.
Switching off the engine
GWarning
Do not turn off the engine before the vehicle
has come to a complete stop. With the engine
not running, there is no power assistance for
the brake and steering systems. In this case,
it is important to keep in mind that a
considerably higher degree of effort is
necessary to brake and steer the vehicle.
GWarning!
Keep in mind that turning off the engine alone
only will shift AUTOTRONIC into neutral
position N automatically.
Always shift AUTOTRONIC into park position
P before turning off the engine.
Otherwise the vehicle could roll away which
could result in an accident and/or serious
personal injury.
XShift the transmission to position P.XTurn the SmartKey to position 0 in the
ignition lock and remove it.
The immobilizer is activated.XApply the parking brake firmly.
i The SmartKey can only be removed if the
automatic transmission is in position P.
Parking brake
GWarning
Engaging the parking brake while the vehicle
is in motion can cause the rear wheels to lock
up. You could lose control of the vehicle and
cause an accident. In addition, the vehicle's
brake lights do not light up when the parking
brake is engaged.
GWarning!
When leaving the vehicle, always remove the
SmartKey from the starter switch, take it with
you, and lock the vehicle. Do not leave
children unattended in the vehicle, or with
access to an unlocked vehicle. Children could
release the parking brake and/or shift the
automatic transmission out of park position
P , either of which could result in an accident
and/or serious personal injury.
XTo apply: pull parking brake ; up firmly.
When the engine is running, the $ (USA
only) or J (Canada only) indicator lamp
lights up in the instrument cluster.XTo release: depress the brake pedal and
keep it depressed.
The selector lever lock is released.XPull parking brake ; up firmly.XPress release button : on parking
brake ; and move the parking brake down
to the stop.
When the ignition is switched on or the
engine is running, the $ (USA only) or
J (Canada only) indicator lamp goes out
in the instrument cluster.
Parking up the vehicle
If you leave the vehicle parked up for longer
than four weeks, the battery may be damaged
by exhaustive discharge.
Parking135Driving and parkingZ

Wet road surfaceGWarning
After driving in heavy rain for some time
without applying the brakes or through water
deep enough to wet brake components, the
first braking action may be somewhat
reduced. You have to depress the brake pedal
more firmly. Maintain a safe distance from
vehicles 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.
GWarning
Make sure that you do not endanger other
road users when you apply the brakes.
Limited braking performance on salt
treated roads
GWarning
The layer of salt on the brake discs and the
brake pads/linings may cause a delay in the
braking effect, resulting in a significantly
longer braking distance, which could lead to
an accident.
To avoid this danger, you should:
R occasionally brake carefully, without
putting other road users at risk, when you
are driving on salted roads. This helps to
remove any salt that may have started to
build up on the brake discs and the brake
pads/linings.
R maintain a greater distance to the vehicle
ahead and drive with particular care.
R carefully apply the brakes at the end of a
trip and immediately after commencing a
new trip, so that salt residues are removed
from the brake discs.
Brake maintenance
! 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 an authorized Mercedes-Benz
Center.
All checks and maintenance work on the
brake system must be carried out at a
qualified specialist workshop only. Consult an
authorized Mercedes-Benz Center for this
purpose.
Have the brake pads and the brake fluid
replaced at a qualified specialist workshop,
e.g. an authorized Mercedes-Benz Center.
GWarning
If other than recommended brake pads are
installed, or other than recommended brake
fluid is used, the braking properties of the
vehicle can be degraded to an extent that safe
braking is substantially impaired. This could
result in an accident.
! A function or performance test may only
be carried out on a two-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,
the drive train or the brake system may
suffer damage.
! As the ESP ®
system operates
automatically, the engine and the ignition
must be switched off (the key must be in
position 0 or 1 in the ignition lock) if the
parking brake is tested on a brake
dynamometer (for a maximum of ten
seconds).
138Driving tipsDriving and parking