
Stop the vehicle in a safe location away from other traffic. Turn off the engine, get out of the
vehicle and do not stand near the vehicle until the engine has cooled down.
!  If the coolant temperature exceeds 248  ‡(120  †) do not continue driving. The engine will
otherwise be damaged.
Tires
ProblemPossible causes/consequences and  M Solutionsh
USA only:
The yellow combination
low tire pressure
warning lamp/TPMS
malfunction warning
lamp is lit.GRisk of accident
The tire pressure monitor has detected a loss of pressure in at
least one of the tires.
XStop the vehicle without making any sudden steering or braking
maneuvers. Pay attention to the traffic conditions as you do so.XObserve the additional display messages in the multifunction
display.XCheck the tire pressure. If necessary, correct the tire pressure
( Y  page 271).XIf necessary, change a wheel ( Y page 280).h
USA only:
The yellow combination
low tire pressure
warning lamp/TPMS
malfunction warning
lamp flashes for sixty
seconds and then
remains lit.The tire pressure monitor is faulty.XObserve the additional display messages in the multifunction
display.XVisit a qualified specialist workshop.GWarning
Each tire, including the spare (if provided), should be checked every other week when cold and
inflated to the inflation pressure recommended by the vehicle manufacturer on the Tire and
Loading Information placard on the driver's door  B-pillar or, if available, the tire inflation pressure
label on the inside of the fuel filler flap. If your vehicle has tires of a different size than the size
indicated on the Tire and Loading Information placard or, if available, the tire inflation pressure
label, you should determine the proper tire inflation pressure for those tires.
As an added safety feature, your vehicle has been equipped with a tire pressure monitoring
system (TPMS) that illuminates a low tire pressure warning lamp when one or more of your tires
are significantly underinflated. Accordingly, when the low tire pressure warning lamp illuminates,
you should stop and check your tires as soon as possible, and inflate them to the proper pressure.
Driving on a significantly underinflated tire causes the tire to overheat and can lead to tire failure.
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Underinflation also reduces fuel efficiency and tire tread life, and may affect the vehicle's handling
and stopping ability. Please note that the TPMS is not a substitute for proper tire maintenance,
and it is the driver's responsibility to maintain correct tire pressure, even if underinflation has
not reached the level to trigger illumination of the TPMS low tire pressure warning lamp.
Your vehicle has also been equipped with a TPMS malfunction indicator to indicate when the
system is not operating properly. The TPMS malfunction indicator is combined with the low tire
pressure warning lamp. When the system detects a malfunction, the warning lamp will flash for
approximately one minute and then remain continuously illuminated. This sequence will continue
upon subsequent vehicle start-ups as long as the malfunction exists. When the malfunction
indicator is lit, the system may not be able to detect or signal low tire pressure as intended.
TPMS malfunctions may occur for a variety of reasons, including the installation of incompatible
replacement or alternate tires or wheels on the vehicle that prevent the TPMS from functioning
properly. Always check the TPMS malfunction warning lamp after replacing one or more tires or
wheels on your vehicle to ensure that the replacement or alternate tires and wheels allow the
TPMS to continue to function properly.Warning and indicator lamps in the instrument cluster203On-board computer and displaysBA 204.9 USA, CA Edition A 2011; 1; 6, en-USd2mwentsVersion: 3.0.3.62010-06-15T08:58:39+02:00 - Seite 203Z 

12 V sockets
Points to observe before use
! If you are using all sockets in the vehicle,
make sure that you do not exceed the
maximum current draw of 55 A. Otherwise,
you will overload the fuses.
The socket can be used for accessories with
a maximum power consumption of 180 W,
e.g. lamps or chargers for mobile phones.
If you use the socket for long periods when
the engine is switched off, the battery may
discharge.
Dashboard socket
The socket is installed in vehicles with audio
equipment or COMAND.
XOpen the glove box (Y page 207).XLift up the cover of socket :.
An additional socket is installed in the center
console on vehicles without an ashtray with
cigarette lighter.
XTo open: slide cover : forwards until it
engages.
XLift up the cover of socket ;.XTo close: press cover : briefly at the
front.
The cover moves back.
Socket in the rear compartment
A socket is installed in the center console in
the rear compartment in vehicles with an
ashtray and a cigarette lighter.
XPull cover ; out by its top edge.XLift up the cover of socket :.
Socket in the cargo compartment
The socket is located in the cargo
compartment on the left-hand side trim.
XLift up the cover of socket :.Features217Loading, stowing and featuresBA 204.9 USA, CA Edition A 2011; 1; 6, en-USd2mwentsVersion: 3.0.3.62010-06-15T08:58:39+02:00 - Seite 217Z     

115 V socketGWarning!
The 115V AC socket operates at high voltage.
Use the 115V AC socket in the vehicle with
the same caution and prudence that you
exercise when using power outlets at home.
Keep any fluids away from the 115V AC
socket. Do not clean the socket with fluids or
tapered objects. Keep the 115V AC socket
cover in the closed position, when not in use.
Otherwise, you could suffer an electric shock
and be seriously or even fatally injured.
GWarning!
A device that you connect must have a
suitable plug that complies with U.S.
standards. Never pull on the cable to unplug
a plug from the 115V AC socket. Do not use
a damaged connection cable. The 115V AC
socket may not be connected to another
115V AC power source. Do not use converters
to a grounding plug with the 115V AC socket.
This could cause serious personal injury to
you and/or others.
GWarning!
If the 115V AC socket is damaged or torn out
of the trim, do not use or touch the 115V AC
socket. Using a 115V AC socket that is
damaged or torn out of the trim could cause
serious personal injury to you and/or others.
The 115 V AC power socket : provides an
alternating voltage of 115 V, so that small
electronic devices can be connected. These
devices, such as games consoles, chargers
and laptops, should not consume more than
a maximum of 150 W altogether.
Requirements for operation of these devices:
R12 V power sockets in the footwell of the
second row of seats and in the stowage
compartment must be functioning
correctly (Y page 217).
Rthe plug of the electronic device is plugged
into the 115 V power socket :.
Rthe on-board voltage is within a permissible
voltage range.
Rthe maximum wattage of the device to be
connected must not exceed 150 W.
XOpen flap =.XSwitch the ignition on.XInsert the plug of the electrical device into
the 115 V power socket :.
Indicator lamp ; lights up.
If indicator lamp ; does not light up, please
read the chapter on malfunctions.
XTo turn off: disconnect the plug from the
115 V power socket :.
Ensure that you do not pull on the cord.
XClose flap =.
Possible causes of malfunction:
Rthe on-board voltage of the vehicle is not
within the permissible voltage range.
Rthe temperature of the DC/AC converter is
momentarily too high.
Rsome small electronic devices have a
constant nominal power of less than
150 W, but a very high inrush current.
These devices will not work. If you connect
such a device, the 115 V power socket :
will not supply it with power.
If indicator lamp ; still does not light up,
consult a specialist workshop, e.g. an
authorized Mercedes-Benz Center.
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mbrace25
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  ï 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
866-990-9007
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 26
.
The mbrace system is available if:
R it has been activated and is operational.
Activation requires an available cellular
phone network, a valid SIM card and a
service subscription to a surveillance
service provider.
R the battery is sufficiently charged.
R the corresponding cellular 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 control the volume during an mbrace call,
proceed as follows:
XPress the  W or X  button on the
multifunction steering wheel.
or
XUse the volume controller of the audio
system.
You can find information and a description of
all available features under "Owners Online"
at  http://www.mbusa.com 27
System self-test
After you have switched on the ignition, the
system carries out a self-diagnosis.
GWarning
A malfunction in the system has been
detected if any or all of the following
conditions occur:
R The indicator lamp in the SOS button does
not come on during the system self-test.
R The indicator lamp in Roadside Assistance
button  F does not come on during the
system self-test.
R The indicator lamp in Information button
ï  does not come on during the system
self-test.
R The indicator lamp in the SOS button,
Roadside Assistance button  F, or
Information button  ï remains
illuminated constantly in red after the
system self-test.
R The message  Tele Aid Inoperative  or
Tele Aid Not Activated  appears in the
25
The system is called TELEAID in Canada.
26 USA only.
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multifunction display after the system self-
test.
If a malfunction is indicated as outlined above,
the system may not operate as expected. In
case of an emergency, help will have to be
summoned by other means.
Have the system checked at the nearest
authorized Mercedes-Benz Center or contact
the following service hotlines:
R USA:  Response Center under the number
866-990-9007
R Canada:  Customer Service under
1-888-923-8367.
Emergency call
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  ï 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
866-990-9007
R Canada:  Customer Service under
1-888-923-8367
An emergency call is dialed automatically if
an air bag or Emergency Tensioning Device is
triggered.
i An automatically dialed mbrace
emergency call cannot be canceled.
An emergency call can also be dialed
manually.
Once the emergency call is in progress, the
indicator lamp in the SOS button flashes. The
Connecting Call  message appears in the
multifunction display.
COMAND is muted.
Once a connection has been established, the
Call Connected  message appears in the
multifunction display.
All important information on the emergency
is compiled, for example:
R current location of the vehicle (as
determined by the GPS system)
R vehicle model
R vehicle color
R vehicle identification number
A voice connection between the Response
Center and the occupants of the vehicle will
be established automatically soon after the
emergency call has been initiated. If the
vehicle occupants are able to respond, the
Response Center will attempt to obtain more
detailed information on the emergency.
i If no vehicle occupant answers, an
ambulance is immediately sent to the
vehicle.GWarning
If the indicator lamp in the SOS button is
flashing continuously and there was no voice
connection to the Response Center
established, then the mbrace system could
not initiate an emergency call (e.g. the
relevant cellular phone network is not
available).
The message  Call Failed appears in the
multifunction display for approximately
10 seconds.
Should this occur, assistance must be
summoned by other means.
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Making an emergency callXTo initiate an emergency call 
manually:  press cover  : briefly to open.XPress SOS button  ; briefly.
The indicator lamp in SOS button  ;
flashes until the emergency call is ended.XWait for the voice connection with the
Response Center.XAfter the emergency call is ended, close
cover  :.GWarning
If you feel at any way in jeopardy when in the
vehicle (e.g. smoke or fire in the vehicle,
vehicle in a dangerous road location), please
do not wait for voice contact after you have
pressed the SOS button. Carefully leave the
vehicle and move to a safe location. The
Response Center will automatically contact
local emergency officials with the vehicle's
approximate location if they receive an
automatic SOS signal and cannot make voice
contact with the vehicle occupants.
Roadside Assistance call buttonXPress and hold Roadside Assistance
button  : for more than two seconds.
A call to a Mercedes-Benz Roadside
Assistance Representative is initiated. The
indicator lamp in Roadside Assistance
button  : flashes while the call is active.
The  Connecting Call  message appears in
the multifunction display and the audio
system or COMAND 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 audio system or 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. Spoken commands are not available.
A voice connection is established between
the Mercedes-Benz Roadside Assistance
Representative and the vehicle occupants.
XDescribe the type of assistance needed.
The Mercedes-Benz Roadside Assistance
Representative either sends a qualified
Mercedes-Benz technician or organizes for
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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 MB info call
button  : flashes continuously and it was
not possible to establish a voice
connection to the Response Center, then
the mbrace system has failed to initiate a
Roadside Assistance call (e.g. the
corresponding cellular 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 the audio system or on
COMAND.
i Sign and Drive services 28
: 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 tire.
MB Info call button
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 COMAND 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 audio system or 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. Spoken commands are 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 under  http://www.mbusa.com 29
.
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. the corresponding mobile phone
network is not available). The  Call 
Failed  message appears in the
multifunction display.
28 USA only.
29 USA only.222FeaturesLoading, stowing and features
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