
General notes
The Audio 20/COMAND section in these
operating instructions describes the basic
operating principles. More information can be
found in the Digital Operator's Manual.
Important safety notes
GWARNING
Modifications to electronic components, their software as well as wiring can impair their
function and/or the function of other net-
worked components. In particular, systems
relevant to safety could also be affected. As a
result, these may no longer function as inten-
ded and/or jeopardize the operating safety of
the vehicle. There is an increased risk of an
accident and injury.
Never tamper with the wiring as well as elec-
tronic components or their software. You
should have all work to electrical and elec-
tronic equipment carried out at a qualified
specialist workshop.
If you make any changes to the vehicle elec-
tronics, the general operating permit is ren-
dered invalid.
GWARNING
If you operate information systems and com-
munication equipment integrated in the vehi-
cle while driving, you will be distracted from
traffic conditions. You could also lose control
of the vehicle. There is a risk of an accident.
Only operate the equipment when the traffic
situation permits. If you are not sure that this
is possible, park the vehicle paying attention
to traffic conditions and operate the equip-
ment when the vehicle is stationary.
You must observe the legal requirements for
the country in which you are currently driving
when operating Audio 20/COMAND. Audio 20/COMAND calculates the route to
the destination without taking account of the
following, for example:
Rtraffic lights
Rstop and yield signs
Rmerging lanes
Rparking or stopping in a no parking/no
stopping zone
Rother road and traffic rules and regulations
Rnarrow bridges
Audio 20/COMAND can give incorrect navi-
gation commands if the actual street/traffic
situation does not correspond with the digital map's data. Digital maps do not cover all
areas nor all routes in an area. For example, a
route may have been diverted or the direction
of a one-way street may have changed.
For this reason, you must always observe
road and traffic rules and regulations during
your journey. Road and traffic rules and reg-
ulations always have priority over the sys-
tem's driving recommendations.
Navigation announcements are intended to
direct you while driving without diverting your
attention from the road and driving.
Please always use this feature instead of con-
sulting the map display for directions. Look-
ing at the icons or map display can distract
you from traffic conditions and driving, and
increase the risk of an accident.
Bear in mind that at a speed of only 30 mph
(approximately 50 km/h) your vehicle covers
a distance of 44 feet (approximately 14 m)
per second.
This equipment complies with FCC radiation
exposure limits set forth for uncontrolled
equipment and meets the FC
C radio fre-
quency (RF) Exposure Guidelines in Supple-
ment C to OET65.
This equipment has very low levels of RF
energy that is deemed to comply without
maximum permissive exposure evaluation
(MPE). But it is desirable that it should be
installed and operated with at least 8inches
(20 cm) and more between the radiator and a
214Important safety notes
Audio 20/COMAND

Before every trip, make sure that the seat
backrests and the rear bench seat/rear seat
are engaged.
Observe the loading guidelines (Ypage 238).
The left-hand and right-hand rear seat backr-
ests can be folded down separately to
increase the trunk capacity.
Folding the seat backrest forward
iVehicles with memory function: when you
fold one or both parts of the rear seat back-
rest forwards, the respective front seat
moves forward slightly, when necessary, in
order to avoid contact.
XVehicles without memory function: if nec-
essary, move the driver's or front-
passenger seat forward.
XOpen the trunk.
XPull right-hand or left-hand rear seat back-
rest release handle :.
The corresponding rear seat backrest is
released.
The rear seat head restraints are lowered.
XFold rear seat backrest ;forwards.
XMove the driver's or front-passenger seat
back if necessary.
Folding the seat backrest back
!Make sure that the seat belt does not
become trapped when folding the rear seat
backrest back. Otherwise, it could be dam-
aged.
XMove the driver's or front-passenger seat
forward if necessary.
XFold rear seat backrest :back until it
engages.
If the rear seat backrest is not engaged and
locked, this will be shown in the multifunc-
tion display in the instrument cluster. A
warning tone also sounds.
XAdjust the head restraints if necessary.
XMove the driver's or front-passenger seat
back if necessary.
iYou should always engage the rear seat
backrests if you do not need the through-
loading feature. This will prevent unauthor-
ized access to the trunk from the vehicle
interior.
240Stowage areas
Stowage and features

EASY-PACK through-loading facility in
the rear bench seat (Wagon)
Important safety notes
GWARNING
If the rear bench seat/rear seat and seat
backrest are not engaged they could fold for-
wards, e.g. when braking suddenly or in the
event of an accident.
RThe vehicle occupant would thereby be
pushed into the seat belt by the rear bench
seat/rear seat or by the seat backrest. The
seat belt can no longer offer the intended
level of protection and could even cause
injuries.
RObjects or loads in the trunk/cargo com-
partment cannot be restrained by the seat
backrest.
There is an increased risk of injury.
Before every trip, make sure that the seat
backrests and the rear bench seat/rear seat
are engaged.
Observe the loading guidelines (Ypage 238).
Folding the rear seat backrests forward
!When folding the rear seat backrest for-
wards, ensure that there are no items lying
on the seat cushions. These items could
otherwise be damaged or could themselves
damage the rear seats.
The left-hand and right-hand rear seat backr-
ests can be folded forwards separately to
increase the cargo compartment capacity.
The combined cargo cover and net can
remain installed.
iWhen you fold one or both parts of the
rear seat backrests forwards, the headr-
ests are also lowered if necessary. In the
case of vehicles with memory function, the
respective front seat is moved forwards
slightly to avoid contact with the seat
behind it.
XVehicles without memory function: if nec-
essary, move the driver's or front-
passenger seat forward.
XPull the left-hand or right-hand release han-
dle at the rear in cargo compartment :or
at the side beside backrests ;.
The corresponding backrest folds for-
wards.
XMove the driver's or front-passenger seat
back if necessary.
Stowage areas241
Stowage and features
Z

Folding the rear seat backrest back
!Make sure that the seat belt does not
become trapped when folding the rear seat
backrest back. Otherwise, itcould be dam-
aged.
XMove the driver's or front-passenger seat
forward ifnecessary.
XFo ldseat backrest :back until it engages.
If the rear seat backrest isnot engaged and
locke d,this will be shown in the multifunc-
tion displayinthe instrument cluster. A
warning tone also sounds.
XAdjust the head restraints ifnecessary
(
Ypage 116).
XMove the driver's or front-passenger seat
back ifnecessary.
Securing cargo
Plastic hooks (Sedan)
On vehicles without a through-loadin g feature
in the rear bench seat, six plastic hooks are
installed to the trunk floor.
Cargo tie-down rings
General notes
Observe the fol lowing notes on securing
loads:
RObserve the loading guidelines
(
Ypage 238).
RSe cure the load using the cargo tie-down
rings.
RDistribute the load on the cargo tie-down
rings evenly.
RDo not use elastic straps or nets to secure
a load, as these are only intended as an
anti-s lipprotection for light loads.
RDo not route tie-down s across sharp edges
or corners.
RPad sharp edges for protection.
Trunk/cargo compar tment
Carg otie-down rings :(Sedan )
Cargotie-down rings :(Wagon)
242Stowage areas
Stowage and features

A malfunction in the system has been detec-
ted if one of the following occurs:
RThe indicator lamp in the SOS button doesnot come on during the system self-test.
RThe indicator lamp in the FRoadside
Assistance button does not light up during
self-diagnosis of the system.
RThe indicator lamp in the ïMB Info call
button does not light up during self-diag-
nosis of the system.
RThe indicator lamp in one or more of the
following buttons continues to light up red
after the system self-diagnosis:
-SOS button
-F Roadside Assistance call button
-ïMB Info call button
RTheInoperativeor the Service Not
Activatedmessage appears in the multi-
function display after the system self-diag-
nosis.
If a malfunction is indicated as outlined
above, the system may not operate as expec-
ted. In the event 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:
Mercedes-Benz Customer Assistance Center
at 1-800-FOR-MERCedes (1-800-367-6372)
or 1-866-990-9007
Emergency call
Important safety notes
GWARNING
It can be dangerous to remain in the vehicle,
even if you have pressed the SOS button in an emergency if:
Ryou see smoke inside or outside of the vehi-
cle, e.g. if there is a fire after an accident
Rthe vehicle is on a dangerous section of
road
Rthe vehicle is not visible or cannot easily beseen by other road users, particularly when
dark or in poor visibility conditions
There is a risk of an accident and injury.
Leave the vehicle immediately in this or simi-
lar situations as soon as it is safe to do so.
Move to a safe location along with other vehi-
cle occupants. In such situations, secure the
vehicle in accordance with national regula-
tions, e. g. with a warning triangle.
General notes
Observe the notes on system activation
(
Ypage 252).
An emergency call is dialed automatically if an
air bag or Emergency Tensioning Device is
triggered. You cannot end an automatically
triggered emergency call yourself.
An emergency call can also be initiated man-
ually.
As soon as the emergency call has been ini-
tiated, the indicator lamp in the SOS button
flashes. The Connecting Call
message
appears in the multifunction display.
The audio output is muted.
Once the connection has been made, the
Call Connected
message appears in the
multifunction display.
Features253
Stowag ean d features
Z

USA: FCC ID: CB2HMIHL4
Canada: IC: 279B-HMIHL4
Important safety notes
GWARNING
When you operate or program the garage door
with the integrated garage door opener, per-
sons in the range of movement of the garage
door can become trapped or struck by the
garage door. There is a risk of injury.
When using the integrated garage door
opener, always make sure that nobody is
within the range of movement of the garage
door.
GWARNING
Combustion engines emit poisonous exhaust
gases such as carbon monoxide. Inhaling
these exhaust gases leads to poisoning. There
is a risk of fatal injury. Therefore never leave
the engine running in enclosed spaces with-
out sufficient ventilation.
Programming
Programming buttons
Pay attention to the "Important safety notes"
(
Ypage 257).
Garage door remote control Ais not inclu-
ded with the integrated garage door opener.
XTurn the SmartKey to position 2in the igni-
tion lock (
Ypage 137).
XSelect one of buttons ;to? to use to
control the garage door drive.
XTo start programming mode: press and
hold one of buttons ;to? on the inte-
grated garage door opener.
The garage door opener is now in program-
ming mode. After a short time, indicator
lamp :lights up yellow.
Indicator lamp :lights up yellow as soon
as button ;,=or? is programmed for
the first time. If the selected button has
already been programmed, indicator
lamp :will only light up yellow after ten
seconds have elapsed.
XRelease button ;,=or?. Indicator
lamp :flashes yellow.
XTo program the remote control: point
garage door remote control Atowards
buttons ;to? on the rear-view mirror at
a distance of 2 to 8 inches (5 to 20 cm).
XPress and hold button Bon remote control
A until indicator lamp :lights up green.
When indicator lamp :lights up green:
programming is finished.
When indicator lamp :flashes green: pro-
gramming was successful. The next step is
to synchronize the rolling code
(
Ypage 257).
XRelease button Bon remote control Afor
the garage door drive system.
If indicator lamp :lights up red: repeat the
programing procedure for the correspond-
ing button on the rear-view mirror. When
doing so, vary the distance between remote
control Aand the rear-view mirror.
The required distance between remote
control Aand the integrated garage door
opener depends on the garage door drive
system. Several attempts might be neces-
sary. You should test every position for at
least 25 seconds before trying another
position.
Synchronizing the rolling code
Pay attention to the "Important safety notes"
(
Ypage 257).
If the garage door system uses a rolling code,
you will also have to synchronize the garage
Features257
Stowage and features
Z

Problems when programming
If you are experiencing problems programing
the integrated garage door opener on the
rear-view mirror, take note of the following
instructions:
RCheck the transmitter frequency used by
garage door drive remote controlAand
whether it is supported. The transmitter
frequency can usually be found on the back
of the garage door drive remote control.
The integrated garage door opener is com-
patible with devices that have units which
operate in the frequency range of 280 to
433 MHz.
RReplace the batteries in garage door
remote control A. This increases the like-
lihood that garage door remote control A
will transmit a strong and precise signal to
the integrated garage door opener.
RWhen programming, hold remote control
A at varying distances and angles from the
button which you are programming. Try var-
ious angles at a distance between 2and
12 inches (5to 30 cm) or at the same angle
but at varying distances.
RIf another remote control is available for the
same garage door drive, repeat the same
programming steps with this remote con-
trol. Before performing these steps, make
sure that new batteries have been installed
in garage door drive remote control A.
RNote that some remote controls only trans-
mit for a limited amount of time (the indi-
cator lamp on the remote control goes out).
Press buttonBon remote control Aagain
before transmission ends.
RAlign the antenna cable of the garage door
opener unit. This can improve signal recep-
tion/transmission.
Opening/closing the garage door
After it has been programmed, the integrated
garage door opener performs the function of
the garage door system remote control. Please also read the operating instructions
for the garage door system.
XTurn the SmartKey to position
2in the igni-
tion lock (
Ypage 137).
XPress button ;,=or? which you have
programmed to operate the garage door.
Garage door system with a fixed code: indi-
cator lamp :lights up green.
Garage door system with a rolling code:
indicator lamp :flashes green.
The transmitter will transmit a signal as
long as the button is pressed. The trans-
mission is halted after a maximum of ten
seconds and indicator lamp :lights up
yellow.
XPress button ;,=or? again if neces-
sary.
Clearing the memory
Make sure that you clear the memory of the
integrated garage door opener before selling
the vehicle.
XTurn the SmartKey to position 2in the igni-
tion lock (
Ypage 137).
XPress and hold buttons ;and ?.
The indicator lamp initially lights up yellow
and then green.
XRelease buttons ;and ?.
The memory of the integrated garage door
opener in the rear-view mirror is cleared.
Floormats
GWARNING
Objects in the driver's footwell can restrict the pedal travel or obstruct a depressed pedal.
The operating and road safety of the vehicle is
jeopardized. There is a risk of an accident.
Make sure that all objects in the vehicle are
stowed correctly, and that they cannot enter
the driver's footwell. Install the floormats
securely and as specified in order to ensure
sufficient clearance for the pedals. Do not use
Features259
Stowage and features
Z

GWARNING
When the hood is open and the windshield
wipers are set in motion, you can be injured by
the wiper linkage. There is a risk of injury.
Always switch off the windshield wipers and
the ignition before opening the hood.
!Make sure that the windshield wipers are
not folded away from the windshield. You
could otherwise damage the windshield
wipers or the hood.
XMake sure that the windshield wipers are
turned off.
XPull release lever :on the hood.
The hood is released.
XReach into the gap, pull hood catch han-
dle ;up and lift the hood.
If you lift the hood by approximately 15 in
(40 cm), the hood is opened and held open automatically by the gas-filled strut.
Closing the hood
XLower the hood and let it fall from a height
of approximately 8 in (20 cm).
XCheck that the hood has engaged properly.
If the hood can be raised slightly, it is not
properly engaged. Open it again and close
it with a little more force.
Radiator
Vehicles with a diesel engine: do not cover
the radiator, for example with a winter front or
bug cover. The readings of the on-board-diag-
nostic system may otherwise be inaccurate.
Some of these readings are required by law
and must be accurate at all times.
Engine oil
General notes
GWARNING
Hybrid vehicles: be sure to read the "HYBRID" supplement. Otherwise, you could fail to rec-
ognize dangers.
Depending on your driving style, the vehicle
consumes up to 0.9 US qt (0.8 liters) of oil per600 miles (1,000 km). The oil consumption
may be higher than this when the vehicle is
new or if you frequently drive at high engine
speeds.
Depending on the engine, the oil dipstick may
be in a different location.
When checking the oil level:
Rpark the vehicle on a level surface.
Rthe engine should be switched off for
approximately five minutes if the engine is
at normal operating temperature.
Rif the engine is not at normal operating
temperature, e.g. if the engine was only
started briefly, wait about 30 minutes
before carrying out the measurement.
Engine compartment263
Maintenance and care
Z