Page 238 of 474

236 Controls in detailUseful featuresElectrical outlet
An electrical outlet is located on the right
side of the trunk.
Switch on the ignition (
page 36).
Flip up cover and insert electrical plug
(cigar lighter type).
Telephone*
Radio transmitters, such as a portable tele-
phone or a citizens band unit, should only
be used inside the vehicle if they are con-
nected to an antenna that is installed on
the outside of the vehicle.
The external antenna must be approved by
Mercedes-Benz. Please contact an autho-
rized Mercedes-Benz Center for informa-
tion on the installation of an approved
external antenna. Refer to the radio trans-
mitter operation instructions regarding use
of an external antenna.
iThe electrical outlet can be used to ac-
commodate electrical consumers (e.g.
air pump, auxiliary lamps) up to a max-
imum of 180 W.
Warning!
G
Never operate radio transmitters equipped
with a built-in or attached antenna (i.e. with-
out being connected to an external antenna)
from inside the vehicle while the engine is
running. Doing so could lead to a malfunc-
tion of the vehicle’s electronic system, pos-
sibly resulting in an accident and/or serious
personal injury.
Warning!
G
Please do not forget that your primary re-
sponsibility is to drive the vehicle. A driver’s
attention to the road must always be
his /her primary focus when driving. For
your safety and the safety of others, we rec-
ommend that you pull over to a safe location
and stop before placing or taking a tele-
phone call.
If you choose to use the telephone
1 while
driving, please use the hands-free device
and only use the telephone when road,
weather, and traffic conditions permit.
Some jurisdictions prohibit the driver from
using a cellular telephone while driving a ve-
hicle.
Only operate the COMAND (Cockpit Man-
agement and Data System)
1 if road, weath-
er, and traffic conditions permit.
1Observe all legal requirements
Page 246 of 474

244 Controls in detailUseful features
Remote door unlock
In case you have locked your vehicle unin-
tentionally (e.g. SmartKey inside vehicle),
and the reserve SmartKey is not handy:
Contact the Mercedes-Benz Response
Center at 1-800-756-9018 (in the USA)
or 1-888-923-8367 (in Canada).
You will be asked to provide your pass-
word which you provided when you
completed the subscriber agreement.
Then return to your vehicle and pull the
trunk recessed handle for a minimum
of 20 seconds until the SOS button is
flashing.
The message
Call connected
appears
in the multifunction display.
As an alternative, you may unlock the vehi-
cle via Internet using the ID and password
sent to you shortly after the completion of
your acquaintance call.
iThe indicator lamp in the respective
button flashes until the call is conclud-
ed. Calls can only be terminated by a
Response Center or Customer Assis-
tance Center representative except
Roadside Assistance and Information
calls, which can also be terminated by
pressing button ì on the multifunc-
tion steering wheel or the respective
button for ending a telephone call on
the COMAND headunit.
iWhen a Tele Aid call has been initiated,
the COMAND system audio is muted
and the selected mode (radio or CD)
pauses. The optional cellular phone (if
installed) switches off. If you must use
this phone, the vehicle must be parked.
Disconnect the coiled cord and place
the call. The COMAND navigation sys-
tem (if engaged) will continue to run.
The display in the instrument cluster is
available for use and spoken com-
mands are only available by pressing
the RPT button on the COMAND unit. A
pop-up window will appear in the
COMAND display to indicate that a Tele
Aid call is in progress.
Page 247 of 474

245 Controls in detail
Useful features
The Response Center will then unlock your
vehicle with the remote door unlocking
feature.Stolen Vehicle Recovery services
In the event your vehicle was stolen:
Report the incident to the police
The police will issue a numbered
incident report.
Pass this number on to the
Mercedes-Benz Response Center along
with your password issued to you when
you subscribed to the service.
The Response Center will then attempt
to covertly contact the vehicle’s Tele
Aid system. Once the vehicle is locat-
ed, the Response Center will contact
the local law enforcement and you. The
vehicle’s location will only be provided
to law enforcement.
iThe remote door unlock feature is avail-
able if the relevant cellular phone net-
work is available.
The SOS button will flash and the mes-
sage
Call connected
will appear in the
multifunction display to indicate re-
ceipt of the door unlock command.
Once the vehicle is unlocked, a
Response Center specialist will at-
tempt to establish voice contact with
the vehicle occupants.
If the trunk recessed handle was pulled
for more than 20 seconds before door
unlock authorization was received by
the Response Center, you must wait
15 minutes before pulling the trunk re-
cessed handle again.
iIf the anti-theft alarm or the tow-away
alarm stays on for more than
30 seconds, a call to the Response
Center is initiated automatically by the
Tele Aid system provided Tele Aid ser-
vice was subscribed to and properly ac-
tivated, and that necessary cellular
service and GPS coverage are avail-
able. See anti-theft alarm system
(page 88) and tow away alarm
(page 90).
Page 266 of 474

264 OperationDriving instructionsPassenger compartmentDriving abroad
Abroad, there is an extensive
Mercedes-Benz service network at your
disposal. If you plan to drive into areas
which are not listed in the index of your
Mercedes-Benz Center directory, you
should request pertinent information from
an authorized Mercedes-Benz Center.Control and operation of radio trans-
mitters
COMAND, radio and telephoneTelephones and two-way radios
Radio transmitters, such as a portable tele-
phone or a citizens band unit should only
be used inside the vehicle if they are con-
nected to an antenna that is installed on
the outside of the vehicle.
Refer to the radio transmitter operation in-
structions regarding use of an external an-
tenna.
Warning!
G
Always fasten items being carried as secure-
ly as possible.
In an accident, during hard braking or sud-
den maneuvers, loose items will be thrown
around inside the vehicle, and cause injury
to vehicle occupants unless the items are
securely fastened in the vehicle.
The trunk is the preferred place to carry ob-
jects.
Warning!
G
Please do not forget that your primary re-
sponsibility is to drive the vehicle safely.
Only operate the COMAND (Cockpit Man-
agement and Data System), radio or tele-
phone
1 if road, weather, and traffic
conditions permit.
Bear in mind that at a speed of just 30 mph
(approximately 50 km / h), your vehicle is
covering a distance of 44 feet (approximate-
ly 14 m) every second.
1Observe all legal requirements.
Warning!
G
Never operate radio transmitters equipped
with a built-in or attached antenna (i.e. with-
out being connected to an external antenna)
from inside the vehicle while the engine is
running. Doing so could lead to a malfunc-
tion of the vehicle’s electronic system, pos-
sibly resulting in an accident and/or
personal injury.
Page 279 of 474

277 Operation
Engine compartment
Battery
Your vehicle is equipped with two batter-
ies:
The starter battery (located in the en-
gine compartment)
The battery for electrical consumers
(located in the trunk)
These batteries should always be suffi-
ciently charged in order to achieve their
rated service life. Refer to Maintenance
Booklet for battery maintenance intervals.
If you use your vehicle mostly for
short-distance trips, you will need to have
the battery charge checked more frequent-
ly.
When replacing batteries, always use bat-
teries approved by Mercedes-Benz.
If you do not intend to operate your vehicle
for an extended period of time, consult an
authorized Mercedes-Benz Center about
steps you need to observe.Batteries contain materials that can harm
the environment if disposed of improperly.
Recycling of batteries is the preferred
method of disposal. Many states require
sellers of batteries to accept old batteries
for recycling.
G
Observe all safety instructions
and precautions when handling
automotive batteries.
A
Risk of explosion
D
Keep flames or sparks away
from battery. Do not smoke.
B
Battery acid is caustic. Do not
allow it to come into contact
with skin, eyes or clothing.
In case it does, immediately
flush affected area with clear
water and seek medical help if
necessary.
E
Wear eye protection.
C
Keep children away.
F
Follow the instructions in this
Operator's Manual.
Page 373 of 474
371 Practical hints
What to do if …
Left display
Right display
Possible cause
Possible solution
Ê
Close
trunk lid
This message will appear whenever
the trunk lid is open.
Close the trunk lid.
M
Close
trunk partition
You are trying to open or close the
retractable hardtop even though
the luggage cover in the trunk is not
pulled out.
Pull out the luggage cover and secure it
(page 197).
W
Washer fluid
Check level
The fluid level has dropped to about 1/3 of total reservoir capacity.
Add washer fluid (
page 278).
Warning!
G
Do not spill antifreeze on hot engine parts.
Antifreeze contains ethylene glycol which
may ignite when if it comes into contact with
hot engine parts. You could be seriously
burned.
Page 374 of 474
372 Practical hintsWhere will I find ...?First aid kit
The first aid kit is located in storage com-
partment under the passenger seat.
1Handle
2Lid
Pull handle 1 up.
Fold lid 2 down.
You can now remove the first-aid kit.
Vehicle tool kit, jack, and spare wheel
The vehicle tool kit, jack, and spare wheel
are stored in the space underneath the
trunk floor.
Lift up the trunk floor cover.
You can now remove the tools and ac-
cessories.
The vehicle tool kit includes
One pair of universal pliers
Two open-end wrenches
One hex-socket wrench
One interchangeable slot/Phillips
screwdriver
One towing eye bolt
One alignment bolt
One fuse extractor
One fuse chart for the main fuse
box
Spare fuses
The jack is exclusively designed for lifting
the vehicle during a wheel change. Always
lower the vehicle on sufficient capacity
jack stands before working under the vehi-
cle.
iCheck expiration dates and contents
for completeness at least once a year
and replace missing/expired items.
Page 377 of 474

375 Practical hints
Locking/unlocking in an emergency
Unlocking the trunk
A minimum height clearance of
6.2 ft (1.89 m) is required to open the
trunk lid.
If you are unable to unlock the trunk with
the SmartKey, open the trunk with the me-
chanical key.
The handle is located above the rear li-
cense plate recess.Trunk lid lock1Unlocking
2Handle
Insert the mechanical key into the
trunk lid lock.
Turn the mechanical key counterclock-
wise to position 1 and hold it in this
position.
Pull the trunk lid handle 2 and lift lid.Unlocking interior storage compart-
ments
Locking storage areas in the passenger
compartment include:
the glove box
the storage compartment under the
armrest
the rear storage compartments
If these cannot be unlocked by means of
the SmartKey, the SmartKey with
KEYLESS-GO*, or the central locking but-
ton, use the mechanical key to open the
glove box.
iUnlocking your vehicle with the me-
chanical key will trigger the anti-theft
alarm system. To cancel the alarm, do
one of the following:
Press button Œ or ‹on the
SmartKey.
Insert the SmartKey in the starter
switch.
Press the KEYLESS-GO* start/stop
button (
page 37).
Grasp the outside door handle (ve-
hicles with KEYLESS-GO* only).
iThe storage compartment under the
armrest and the rear storage compart-
ments can only be unlocked at the
glove box lock using the mechanical
key.