2011 MERCEDES-BENZ G55AMG CAN BUS

! Do not use diesel to refuel vehicles with a
gasoline engine. Even small amounts of the
wrong fuel result in damage to the fuel
system and engine.
! Do not switch on the ignition if you
accidentally refuel with the wrong fuel.
Otherwise, the fuel will enter the fuel lines.
Notify a qualified specialist workshop and
have the fuel tank and fuel lines drained
completely.
Gasoline
Fuel grade
! You should only refuel with unleaded
premium-grade gasoline as this avoids
damaging the catalytic converter.
If engine running problems are apparent,
have the cause checked immediately and
repaired. Excess unburned fuel can
otherwise enter the catalytic converter,
leading to overheating and possibly
causing a fire.
i Only refuel with unleaded premium-grade
gasoline with a specified minimum octane
number of 91 (average value of 96 RON/
86 MON).
Usually, you will find information about the
fuel grade on the pump. If you cannot find
the label on the gasoline pump, ask the gas
station staff.
You can find further information under
"Fuel" ( Y page 277), by consulting an
authorized Mercedes-Benz Center or
visiting http://www.mbusa.com (USA
only).
! Use a filter when refueling from a fuel can.
Otherwise, the fuel lines and/or injection
system could be blocked by particles from
the fuel can.
Refueling
Fuel filler flap
When you open or close the vehicle with the
key, the fuel filler flap is automatically
unlocked or locked.
The position of the fuel filler cap is displayed
in the instrument cluster 8. 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.
Fuel filler cap G 550 (example)
:To open the fuel filler flap;Tire pressure table=Fuel type?To insert the fuel filler cap
Opening
XSwitch off the engine.
i When the engine is running and the fuel
filler flap is open, the yellow reserve fuel
warning lamp and the = (USA only)
or ; (Canada only) engine diagnostics
warning lamp may light up.
For further information on warning and
indicator lamps in the instrument cluster,
see ( Y page 188).
XRemove the key from the ignition lock.XPress the fuel filler flap in the direction of
arrow :.
The fuel filler flap opens slightly.XOpen the fuel filler flap.132RefuelingDriving and parking

Problems with the fuel and fuel tankProblemPossible causes/consequences and M SolutionsFuel is leaking from the
vehicle.GRisk of explosion or fire
The fuel line or the fuel tank is defective.
XTurn the key to position 0 (Y page 117) in the ignition lock
immediately and remove it.XDo not restart the engine under any circumstances.XConsult a qualified specialist workshop.The fuel filler flap
cannot be opened.The fuel filler flap is not unlocked.
or
The key batteries are discharged.XUnlock the vehicle ( Y page 62).
or
XUnlock the vehicle using the mechanical key ( Y page 63).XOpen the rear door.XManually unlock the fuel filler flap using the emergency release
( Y page 133).The fuel filler flap is unlocked, but the opening mechanism is
jammed.XManually unlock the fuel filler flap using the emergency release
( Y page 133).XConsult a qualified specialist workshop.Parking
Important safety notes
GWarning
Do not park this vehicle in areas where
combustible materials can come into contact
with the hot exhaust system. Do not park the
vehicle on dry grassland or harvested grain
fields. Combustible materials, such as grass,
hay or leaves could be ignited by the hot
exhaust system and cause a vehicle fire.
Unintended vehicle movement can cause
serious personal injury or damage to the
vehicle or the vehicle drivetrain. To reduce
such risks, always do the following before
turning off the engine and leaving the vehicle:
R keep your right foot on the brake pedal.
R engage the parking brake.
R shift the automatic transmission into park
position P.
R slowly release the brake pedal.
R when parked on an incline, always turn the
front wheels towards the road curb.134ParkingDriving and parking

RCheck 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, 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
reasonable engine speeds (maximum
3000 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
authorized Mercedes-Benz Center.HEnvironmental note
Protection of the environment is of primary
importance. Treat nature with respect.
Observe all prohibiting signs.
Checklist before driving off-road
XEngine 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.! 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.XWheel-changing tool kit: check that the
jack is working and make sure you have the
wheelbrace, a robust tow cable and a
folding spade in the vehicle.XWheels and tires: check the tire tread
depth and tire pressure.XCheck for damage and remove any foreign
objects, e.g. small stones, from the
wheels/tires.XReplace any missing valve caps.XReplace dented or damaged wheels.XCarry a sound spare wheel.
Checklist after driving off-road
GWarning
If you feel a sudden significant vibration or
ride disturbance, or you suspect that possible
damage to your vehicle has occurred, you
should turn on the hazard warning flashers,
carefully slow down, and drive with caution to
an area which is a safe distance from the road.
Inspect the tires and the vehicle underbody
for possible damage. If the vehicle appears
unsafe, have the vehicle towed to the nearest
authorized Mercedes-Benz Center or tire
dealer for repairs.
Driving over rough terrain places greater
demands on your vehicle than driving on
normal roads. After driving off-road, check
the vehicle. This allows you to detect damage
promptly and reduce the risk of an accident
to yourself and other road users.
XShift the transfer case to HIGH
( Y page 126).XDisengage the differential locks
( Y page 129).Driving tips143Driving and parkingZ

Display messagesPossible causes/consequences and M SolutionsThere is water in the engine oil.XHave the engine oil examined at a qualified specialist workshop.The measuring system is malfunctioning.XVisit a qualified specialist workshop.4
Engine Oil Level
Service RequiredThe engine oil level has dropped to a critical level.XCheck the oil level ( Y page 215).XIf necessary, add engine oil ( Y page 216).XHave the engine checked for leaks if you need to add engine oil
more often than usual.You have added too much engine oil. There is a risk of damaging
the engine or catalytic converter.XSiphon off excess engine oil until it is at the specified level.
Observe the legal requirements.There is water in the engine oil.XHave the engine oil checked.4
At next~gas
station add
1.0 qt. engine oil
(USA only)
At next~gas
station add
1.0 liter engine
oil
(Canada only)The engine oil level is too low.XCheck the oil level ( Y page 215).XIf necessary, add engine oil ( Y page 216).XHave the engine checked for leaks if you need to add engine oil
more often than usual.
Information on approved engine oils can be obtained from any qualified specialist workshop
or on the Internet at http://www.mbusa.com (USA only).
! The oil level is too low. Avoid long journeys with too little engine oil. There is a risk of
engine damage.
The display messages and the corresponding symbol that indicate that the oil level is too
low must not be ignored.
Display messages177On-board computer and displaysZ

Possible causes of malfunction:
R the on-board voltage is not within a
permissible voltage range.
R the temperature of the DC/AC converter is
temporarily too high.
R some small electronic devices have a
constant nominal power of less than
150 W, but a very high switch-on current.
In that case, there is a possibility that these
devices will not function properly as 115 V
socket : is not able to provide a high
enough current.
If indicator lamp ; still does not light up,
consult a qualified specialist workshop, e.g.
an authorized Mercedes-Benz Center.
mbrace 15
Important safety notes
! A license agreement must exist in order
to activate the mbrace service. Make sure
that your system is activated and ready for
use, and press the E MB info call button
to register. If you cannot carry out any of
the steps mentioned, the system may not
be activated.
If you have any questions concerning
activation, please contact one of the
following service hotlines:
R USA: Response Center under
1-888-990-9007
R Canada: Customer Service under
1-888-923-8367
Shortly after successfully registering with the
mbrace service, a user ID and password will
be sent to you by post. You can use this
password to log in to the mbrace section
under "Owners Online" at http://
www.mbusa.com 16
.
The mbrace system is available if:
R it has been activated and is operational.
Activation requires an available mobile
phone network, a valid SIM card and a
service subscription to a surveillance
service provider.
R the battery is sufficiently charged.
R the corresponding mobile phone network
is available for transmitting data to the
Customer Center.
i Determining the location of the vehicle on
a map is only possible if there is sufficient
GPS reception and the vehicle position can
be forwarded to the Customer Center.
The mbrace system
The mbrace system provides three different
services:
R automatic and manual emergency call
R Roadside Assistance call
R MB Info call
To adjust the volume during an mbrace call,
proceed as follows:
XPress the W or X button on the
multifunction steering wheel.
or
XUse the COMAND volume controller.
You can find information and a description of
all available features under "Owners Online"
at http://www.mbusa.com 17
.
System self-test
After you have switched on the ignition, the
system carries out a self-diagnosis.
15 The system is called TELE AID in Canada.
16 USA only.
17 USA only.202FeaturesLoading, stowing and features

The Mercedes-Benz Roadside Assistance
Representative either sends a qualified
Mercedes-Benz technician or organizes for
your vehicle to be transported to the nearest
authorized Mercedes-Benz Center. You may
be charged for services such as repair work
and/or towing. Further details are available
in your mbrace manual.
i If the indicator lamp in Roadside
Assistance button : flashes continuously
and no voice connection to the Response
Center has been established, then the
mbrace system has failed to initiate a
Roadside Assistance call (e.g. the
corresponding mobile phone network is not
available). The Call Failed message
appears in the multifunction display.XTo end a call: press the ~ button on the
multifunction steering wheel.
or
XPress the corresponding button for ending
a phone call on COMAND.
i Sign and Drive services 18
: you are not
charged for services such as jump-starting,
providing a few gallons of fuel for a fuel tank
that has been run dry or changing a flat tire
with the vehicle's own spare wheel.
MB Info call button
XOpen the stowage space under the armrest
( Y page 193).XPress and hold MB Info call button : for
more than two seconds.
A call to the Response Center is initiated.
MB Info call button : indicator lamp
flashes while the connection is being
established. The Connecting call
message appears in the multifunction
display and the COMAND system is muted.
If a connection can be established, the Call
Connected message appears in the
multifunction display.
If a mobile phone network is available and
there is sufficient GPS reception, the mbrace
system transmits data to the Response
Center, for example:
R current location of the vehicle
R vehicle identification number
R vehicle model
R vehicle color
i The COMAND display shows that an
mbrace call is active. You can switch to the
navigation menu by pressing the NAVI
button on COMAND during the call. The
voice output is not available.
A voice connection between the Response
Center and the vehicle occupants is
established. You can obtain information on
how to operate your vehicle's systems, on the
location of the nearest authorized Mercedes-
Benz Center, and on further products and
services offered by Mercedes-Benz USA.
Further details on the mbrace system can be
found at http://www.mbusa.com 19
. Log in
under "Owners Online".
i If the indicator lamp in MB Info call
button : flashes continuously and no
voice connection to the Response Center
has been established, then the mbrace
system has failed to initiate an MB Info call
(e.g. because the corresponding mobile
phone network is not available). The Call
18
USA only.
19 USA only.Features205Loading, stowing and featuresZ

! Only use engine oils and oil filters which
have been approved for vehicles with a
service system. A list of the engine oils and
oil filters that have been tested and
approved according to the Mercedes-Benz
specifications for service products can be
found on the Internet at http://
www.mbusa.com (USA only). Further
information on tested and approved engine
oils and oil filters can be obtained from any
authorized Mercedes-Benz Center.
The following causes engine failure or
damage to the exhaust system:
Rusing engine oils and oil filters that are
not specifically approved for the service
system
Rreplacing the engine oil and oil filter after
having exceeded the interval for
replacement prescribed by the
maintenance system
Rusing engine oil additives
Example: engine oil cap
Engine oil cap (G 55 AMG)
XTurn cap : counter-clockwise and remove
it.
XAdd the amount of oil required.
Observe the specifications in the on-board
computer when doing so or fill carefully to the
maximum mark on the oil dipstick.
iThe difference in quantity between the
MIN mark and the MAX mark on the
dipstick is approximately 2.1 US qts. (2 l).
! Do not add too much oil. If the oil level is
above the "max" mark on the dipstick, too
much oil has been added. This can lead to
damage to the engine or the catalytic
converter. Have excess oil siphoned off.
For further information on engine oil, see
(Y page 279).
XReplace cap : on the filler neck and
tighten clockwise.
Ensure that the cap locks into place
securely.
Checking and adding other service
products
Coolant level
Only check the coolant level when the vehicle
is on a level surface and the engine has cooled
down.
XTurn the key to position 2(Y page 117) in
the ignition lock.
XCheck the coolant temperature display in
the instrument cluster.
The coolant temperature must be below
158 ‡ (70 †).
GWarning
In order to avoid any potentially serious burns:
Ruse extreme caution when opening the
hood if there are any signs of steam or
coolant leaking from the cooling system, or
Engine compartment217Maintenance and careZ

Example: washer fluid reservoir
XMix the windshield washer fluid in a
container beforehand.XAt temperatures above freezing: fill the
washer fluid reservoir with a mix of water
and windshield washer concentrate (e.g.
MB SummerFit).XAt temperatures below freezing: fill the
washer fluid container with a mix of water
and MB SummerFit windshield washer
concentrate. For information on the mixing
ratio, see (Y page 281) or use the premixed
windshield washer solution with antifreeze
available in specialist stores.XTo open: pull cap : upwards by the tab.XAdd the premixed washer fluid.XTo close: press cap : onto the filler neck
until it engages.
Brake fluid level
! If you discover that the brake fluid level in
the brake fluid reservoir has fallen to the
MIN mark or below, check the brake
system for leaks immediately. Also check
the brake lining thickness. Contact a
qualified specialist workshop, e.g. an
authorized Mercedes-Benz Center
immediately.
Do not top up the brake fluid. This will not
rectify the malfunction.
Only check the brake fluid level when the
vehicle is stationary and on a level surface.
The brake fluid level is correct if it is between
MIN marking ; and MAX marking : on the
brake fluid reservoir.
Maintenance
Service interval display
Service messages
Information on the type of service and service
intervals (see separate Service Booklet).
You can obtain more information from an
authorized Mercedes-Benz Center or at
http://www.mbusa.com (USA only).
The service interval display informs you of the
next service due date.
If a service due date has been exceeded, you
also hear a warning tone.
The multifunction display shows a service
message for a few seconds, e.g.
Service A In 99999 Miles
Service A Due now
Service A Exceeded By 99999 Miles
The symbol and the letter indicate which type
of service is due:
¯Minor service A±Major service B
The service interval display does not take into
account any periods of time during which the
battery is disconnected.
Maintenance219Maintenance and careZ