
iMake sure that you have the SmartKey on
your person and that it has not been left in
the vehicle.XClose the front-passenger door.XMake sure that the doors and the trunk are
locked.
i If you lock the vehicle as described above,
the fuel filler flap is not locked. The anti-
theft alarm system is not primed.
Trunk
Important safety notes
Do not leave the SmartKey in the trunk. You
could otherwise lock yourself out.
GWarning
When leaving the vehicle, always remove the
SmartKey from the ignition lock. Always take
the SmartKey with you and lock the vehicle.
Do not leave children unsupervised in the
vehicle, even if they are secured in a child
restraint system, and do not give them access
to an unlocked vehicle. A child's unsupervised
access to a vehicle could result in an accident
and/or serious personal injury. They could:
R injure themselves on vehicle parts
R be seriously or fatally injured by extreme
heat or cold
R injure themselves or have an accident with
vehicle equipment that may still be in
operation even after the SmartKey has
been removed from the ignition, such as the
seat adjustment, steering wheel
adjustment or memory function.
If children open a door, they could cause
severe or even fatal injury to other persons; if
they get out of the vehicle, they could injure
themselves when doing so or be seriously or
even fatally injured by any passing traffic.
Do not expose the child restraint system to
direct sunlight. The child restraint system's
metal parts, for example, could become very
hot, and a child could be burned on these
parts.GWarning!
Do not carry heavy or hard objects in the
passenger compartment or trunk unless they
are firmly secured in place.
Unsecured or improperly positioned cargo
increases a child's risk of injury in the event
of
R strong braking maneuvers
R sudden changes of direction
R an accident
GWarning
Make sure the trunk lid is closed when the
engine is running and while driving. Among
other dangers, deadly carbon monoxide (CO)
gases may enter the vehicle interior resulting
in unconsciousness and death.
! The trunk lid swings upwards when
opened. Therefore, make sure that there is
sufficient clearance above the trunk lid.
You can limit the opening angle of the trunk
lid. This could be useful, for example, if there
is insufficient space above the trunk lid. You
can switch the trunk lid opening height
restriction function on or off via COMAND
( Y page 261).
For the trunk lid to be opened fully, there must
be a minimum clearance from floor to ceiling
of 5.90 ft (1.80 m).
The trunk lid can be:
R opened and closed manually from outside
R opened and closed automatically from
outside
R opened and closed automatically from
inside
R locked separately
R unlocked with the mechanical key
R opened using the emergency release
button inside the trunk
Trunk85Opening and closingZ

XInsert the mechanical key into the trunk lid
lock as far as the stop.
XTurn the mechanical key clockwise from
position 1 to position 2.
XRemove the mechanical key.
Unlocking the trunk (mechanical key)
! The trunk lid swings upwards when
opened. Therefore, make sure that there is
sufficient clearance above the trunk lid.
If the trunk can no longer be unlocked with
the SmartKey or KEYLESS-GO:
XTake the mechanical key out of the
SmartKey (Y page 79).
XInsert the mechanical key into trunk lid
lock : as far as possible.
XTurn the mechanical key counter-clockwise
as far as possible.
The trunk is unlocked.
XTurn the mechanical key back and remove
it.Trunk emergency release
You can open the trunk lid from inside the
vehicle with the emergency release button.
XBriefly press emergency release
button :.
The trunk lid unlocks and opens.
The trunk lid can be unlocked and opened
with the trunk lid emergency release when
the vehicle is stationary or while driving.
Trunk lid emergency release light:
RThe button flashes for 30 minutes after the
trunk lid is opened.
RThe button flashes for 60 minutes after the
trunk lid is closed.
The trunk lid emergency release does not
open the trunk lid if the battery is
disconnected or discharged.
88TrunkOpening and closing

automatically attempts to log into a
network. If no network is available, you will
not be able to make a " 911" emergency
call. If you attempt to make an outgoing
call, the No Service message will appear
for a short while.
911 emergency callGWarning
The 911 emergency call system is a public
service. Using it without due cause is a
criminal offense.
The following conditions must be fulfilled in
order to make a 911 emergency call:
R the mobile phone must be switched on.
R a network must be available.
R a valid and operational SIM card must be
inserted in the mobile phone.
R the mobile phone must be connected to
COMAND via the Bluetooth ®
interface
If you cannot make an emergency call, you
must arrange rescue measures yourself.
XEnter the number using COMAND.XPress the 6 button.
The telephone makes the connection.XWait until the emergency call center
answers and describe the emergency
situation.
Telephony via the Bluetooth ®
interface
Conditions
On the mobile phone
For telephony via COMAND's Bluetooth ®
interface, a Bluetooth ®
-capable mobile
phone is required.
i Not all mobile phones available on the
market are equally suitable. For more
information on suitable mobile phones and
on connecting Bluetooth ®
-capable mobile
phones to COMAND, visit
http://www.mbusa-mobile.com or call
the Mercedes-Benz Customer Assistance
Center at 1-800-FOR-MERCedes
(1-800-367-6372) (US) or Customer
Relations at 1-800-387-0100 (Canada).
The battery of the mobile phone should
always be kept sufficiently charged in order
to prevent malfunctions.
In preparation for telephoning via the
Bluetooth ®
interface, you should check the
following items on your mobile phone (see the
mobile phone operating instructions):XHands-free profile
The mobile phone must support Hands-free
Profile 1.0 or above.
i Some displays (e.g. the signal strength)
depend on the supported version of the
Hands-free Profile.
XBluetooth ®
visibility
On certain mobile phones, the device itself
must be made "visible" for other devices,
as well as activating the Bluetooth ®
function (see the mobile phone operating
instructions).XBluetooth ®
device name
Every Bluetooth ®
device has its own
Bluetooth ®
device name. This name can be
freely chosen, but the default name may be
identical for all devices from a given
manufacturer. It is therefore
recommended that you change this name
so that you can easily recognize your
mobile phone (see the mobile phone
operating instructions).XSwitch on the mobile phone and enter the
PIN when prompted to do so (see the
mobile phone operating instructions).XActivate Bluetooth ®
functions and, where
necessary, Bluetooth ®
visibility on the
mobile phone (see the mobile phone
operating instructions).192TelephoneCOMAND

Switching on video AUX modeXSelect Video in the main function bar by
sliding ZV and turning cVd the COMAND
controller and press W to confirm.
If video AUX mode was the last mode
selected, it will now be active.
If another video source is switched on, you
can now switch to video AUX mode in the
video menu.XSelect Video and press W to confirm.XSelect Aux and press W to confirm.
The video AUX menu appears. You will hear
and see the content of the external video
source if it is connected and switched to
playback.
For details on how to operate the external
video source, see the respective device's
operating instructions.
Showing/hiding the menu
XTo show: press W the COMAND
controller.XTo hide: slide ZV the COMAND controller
and confirm Full screen by pressing W.
Volume and sound settings
You will find details on volume ( Y page 132)
and sound ( Y page 133) settings in the "At a
glance" section.
GWarning!
External video sources may have different
volumes, which can mean that system
messages such as traffic announcements and
navigation system announcements are much
louder. If necessary, please deactivate the
system messages or adjust their volume
manually.
i It may be the case that a device which is
connected as an external video source
seems quieter or louder in the vehicle, or
that the usual maximum volume cannot be
reached. On some devices, it is possible to
adjust the volume separately. In this case,
start at a medium volume and increase it
gradually. This enables you to determine
whether the system is able to play the
music at high volume without distorting it.
Rear Seat Entertainment System
Vehicle equipment
i These Operating Instructions describe all
standard and optional equipment available
for your vehicle at the time of purchase.
Please note that your vehicle may not be
equipped with all features described.
General information
Important safety notes
GWarning
The RSE CD/DVD player is a Class 1 laser
product. There is a danger of invisible laser
radiation when you open or damage the cover.
Do not remove the cover. The RSE CD/DVD
player does not contain any parts which can
be serviced by the user. For safety reasons,
have any necessary service work performed
by qualified personnel.
GWarning
The driver should not wear a Rear Seat
Entertainment headset while operating the
vehicle under any circumstances. The use of
a headset while driving the vehicle could
drastically impair the ability to react to audible
traffic conditions (e.g. emergency sirens from
police/fire/ambulance, another car’s horn,
etc.).
GWarning
When not in use, headsets or external video
sources should be stored in a safe location
(e.g. one of the vehicle’s storage
compartments) so that they are not loose
within the passenger compartment during
braking, vehicle maneuvers or a traffic
242Rear Seat Entertainment SystemCOMAND

Problems with the transmissionProblemPossible causes/consequences and M SolutionsThe acceleration ability
is deteriorating.
The transmission no
longer changes gear.The transmission is in emergency mode.
It is only possible to shift into 2nd gear and reverse gear.XStop the vehicle.XShift the transmission to position P.XSwitch off the engine.XWait at least 10 seconds before restarting the engine.XShift the transmission to position D or R.
If D is selected, the transmission shifts into 2nd gear; if R is
selected, the transmission shifts into reverse gear.XHave the transmission checked at a qualified specialist
workshop immediately.Transfer case
This section is only valid for vehicles with 4-
wheel drive (4MATIC). Power is always
transmitted to both axles.
! Performance tests may only be carried
out on a 2-axle dynamometer. The brake
system or transfer case could otherwise be
damaged. Contact an authorized
Mercedes-Benz Center for a performance
test. Mercedes-Benz recommends that you
use an authorized Mercedes-Benz Center
for this purpose.
! To prevent ESP ®
from intervening, the
ignition must be switched off (SmartKey or
the Start/Stop button in position 0 or 1) if:
R the electric parking brake is being tested
on a brake dynamometer.
R the vehicle is being towed with only one
axle raised (not permitted for vehicles
with 4MATIC).
The brake system could otherwise be
damaged.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.
Refueling313Driving and parkingZ

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.
iIf you cannot turn off the engine as
described here, see "Emergency engine
shutdown" (Y page 477).
Vehicles with automatic transmission
XApply the electric parking brake.XShift the transmission to position P.
Using the SmartKey
XTurn the SmartKey to position 0 in the
ignition lock and remove it.
The parking lock is activated.
iIf you turn off the engine with the
SmartKey and then remove it from the
ignition lock or open a front door, the
automatic transmission switches to P
automatically.
Using KEYLESS-GO
XPress the Start/Stop button (Y page 299).
When the driver's door is closed, the Start/
Stop button is in position 1. When the
driver's door is opened, the Start/Stop
button moves to position 0. This
corresponds to removing the SmartKey.
iIf you turn off the engine with the Start/
Stop button, the automatic transmission
shifts to N. If you then open the driver's or
front-passenger door, the automatic
transmission shifts to P automatically.
iIn an emergency, you can turn off the
engine while the vehicle is in motion by
pressing and holding the Start/Stop button
for three seconds. This function operates
independently of the ECO start/stop
automatic engine switch-off function.
If you have started the engine with the Start/
Stop button and it cannot be switched off as
described:
Xremove the Start/Stop button from the
ignition lock.
Xinsert the SmartKey into the ignition lock.
The engine stops. The ignition lock is in
position 0.
Electric parking brake
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.
Releasing the electric parking brake
manually
XSwitch on the ignition.XPull handle :.
The red F indicator lamp (USA only) or
the red ! indicator lamp (Canada only)
in the instrument cluster goes out.
The electric parking brake can only be
released when the SmartKey in the ignition
Parking317Driving and parkingZ

lock is in position 1 or if the ignition is
switched on using the Start/Stop button.
Releasing the electric parking brake
automatically
The electric parking brake is released
automatically when the following conditions
are simultaneously fulfilled:
R the engine is running.
R the automatic transmission is in position
D or R.
R the hood is closed.
R your seat belt is fastened.
R you depress the accelerator pedal.
If the automatic transmission is in position
R , the trunk lid must be closed.
For the parking brake to be released
automatically if your seat belt is not fastened,
the following conditions must be fulfilled:
R the driver's door is closed.
R you shift out of P or you have previously
driven faster than 2 mph (3 km/h).
Engaging the electric parking brake
manually
XPush handle :.
The red F indicator lamp (USA only) or
the red ! indicator lamp (Canada only)
in the instrument cluster lights up.
i The electric parking brake can also be
applied even if the SmartKey has been
removed.
Engaging the electric parking brake
automatically
The electric parking brake is automatically
applied if HOLD or DISTRONIC PLUS brakes
the vehicle until it is stationary and at least
one of the following conditions is fulfilled:
R the engine is switched off.
R the driver's door is open and the seat belt
is not fastened.
R the hood is released.
R the trunk lid is opened while the automatic
transmission is in position R.
R the vehicle is stationary for a lengthy
period.
The red F indicator lamp (USA only) or the
red ! indicator lamp (Canada only) in the
instrument cluster lights up.
i In addition to the electric parking brake,
P may also be engaged automatically.
Emergency braking with the electric
parking brake
The vehicle can also be braked during an
emergency using the electric parking brake.
XWhile driving, push handle : of the electric
parking brake ( Y page 317).
i
The vehicle is braked as long as you keep
the handle of the electric parking brake
pressed. The longer the electric parking
brake handle is depressed, the greater the
braking force.
During braking:
R a warning tone sounds.
R the Release parking brake message
appears.
R red F indicator lamp (USA only) or
red ! indicator lamp (Canada only)
appears in the instrument cluster
When the vehicle has been braked to a
standstill, the electric parking brake is
engaged.
Parking up the vehicle
If you leave the vehicle parked up for longer
than four weeks, the battery may be damaged
by exhaustive discharge.
XDisconnect the battery or connect it to a
trickle charger.
i You can obtain information about trickle
chargers from a qualified specialist
318ParkingDriving and parking

distance, which creates a danger of a
collision.
Immediately brake the vehicle to increase
your distance to the preceding vehicle. The
warning sound is intended as a final caution
in which you should intercede with your own
braking inputs to avoid a potentially
dangerous situation. Do not wait for the
operation of the warning signal to intercede
with your own braking. This will result in
potentially dangerous emergency braking
which will not always result in an impact being
avoided.
Tailgating increases the risk of an accident.GWarning
DISTRONIC PLUS brakes your vehicle with a
maximum deceleration of 13 ft/s(4 m/s 2
).
This corresponds to approximately 40% of
your vehicle's maximum possible braking
power.
You must apply the brakes yourself to avoid a
collision. DISTRONIC PLUS brakes the vehicle
to restore the set distance to the vehicle in
front or to restore the set speed.
GWarning!
If you do not receive visual or acoustic
warning signals during a critical traffic
situation, DISTRONIC PLUS has either not
recognized the collision risk, has been
deactivated or is malfunctioning.
Remember, whether or not DISTRONIC PLUS
is operating, it is ultimately always the drivers
responsibility to apply the brakes in order to
control the vehicle and avoid a collision.
Cruise control lever:To store the current speed or a higher
speed;To store the current speed or a lower
speed=To deactivate DISTRONIC PLUS?To store the current speed or to call up
the last stored speedATo set the specified minimum distance
Activating DISTRONIC PLUS, storing
and maintaining the current speed
Important safety notes
GWarning!
When the DISTRONIC PLUS is switched on,
the vehicle can be braked. You should
therefore switch off the DISTRONIC PLUS if
the vehicle must be towed.
You can activate DISTRONIC PLUS under the
following circumstances:
R the engine has been started and you have
been driving for up to two minutes
R your vehicle is not secured by the electric
parking brake
R ESP ®
is activated
R the transmission is in position D
R the hood is closed
R the driver's door is closed and you shift the
transmission from position P to D or your
seat belt is fastened
328Driving systemsDriving and parking