Warning/
indicator
lampNSignal type
Possible causes/consequences and M
Solutions
?NThe red coolant warning lamp comes on while the engine is running.
The coolant level is too low.
If the coolant level is correct, the airflow to the engine radiator may be blocked or
the electric engine radiator fan may be malfunctioning.
The coolant is too hot and the engine is no longer being cooled sufficiently.
XObserve the additional display messages in the multifunction display.
XPull over and stop the vehicle safely and switch off the engine, paying attention
to road and traffic conditions.
XSecure the vehicle against rolling away (Ypage 144).
XLeave the vehicle and keep a safe distance from the vehicle until the engine has cooled down.
XCheck the coolant level and add coolant, observing the warning notes
(Ypage 259).
XIf you have to add coolant frequently, have the engine cooling system checked.
XMake sure that the air supply to the engine radiator is not blocked, e.g. by snow,
slush or ice.
XDo not start the engine again until the coolant temperature is below 248 ‡
(120 †). Otherwise, the engine could be damaged.
XDrive to the nearest qualified specialist workshop.
XAvoid subjecting the engine to heavy loads, e.g. driving in mountainous terrain,
and stop-and-go traffic.
?N The red coolant warning lamp comes on while the engine is running. A warning
tone also sounds.
The coolant temperature has exceeded 248 ‡(120 †). The airflow to the engine
radiator may be blocked or the coolant level may be too low.
GWARNING
The engine is not being cooled sufficiently and may be damaged.
Do not drive when your engine is overheated. This can cause some fluids which
may have leaked into the engine compartment to catch fire.
Steam from the overheated engine can also cause serious burns which can occur
just by opening the hood.
There is a risk of injury.
XObserve the additional display messages in the multifunction display.
XPull over and stop the vehicle safely and switch off the engine, paying attention
to road and traffic conditions.
XSecure the vehicle against rolling away (Ypage 144).
XLeave the vehicle and keep a safe distance from the vehicle until the engine has
cooled down.
XCheck the coolant level and add coolant, observing the warning notes
(Ypage 259).
XIf you have to add coolant frequently, have the engine cooling system checked.
XMake sure that the air supply to the engine radiator is not blocked, e.g. by snow,
slush or ice.
Warning and indicator lamps in the instrument cluster231
On-board computer and displays
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 instruc-
tions:
RCheck the transmitter frequency used by
garage door drive remote controlAand
whether it is supported. The transmitter fre-
quency 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 likelihood that
garage door remote control Awill 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 but- ton which you are programming. Try various
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 pro-
gramming steps with this remote control.
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 transmit
for a limited amount of time (the indicator
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 ignition
lock (Ypage 128).
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: indi-
cator lamp
:flashes green.
The transmitter will transmit a signal as long
as the button is pressed. The transmission is
halted after a maximum of ten seconds and
indicator lamp :lights up yellow.
XPress button ;,=or? again if necessary.
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 ignition
lock (Ypage 128).
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
loose floormats and do not place floormats on
top of one another.
Features255
Stowage and features
Z
Engine compartment
Hood
Important safety notes
GWARNING
If the hood is unlatched, it may open up when the vehicle is in motion and block your view.
There is a risk of an accident.
Never unlatch the hood while driving. Before
every trip, ensure that the hood is locked.
GWARNING
When opening and closing the hood, it may
suddenly fall into the closed position. There is a risk of injury to persons within range of
movement of the hood.
Open and close the hood only when no one is
within its range of movement.
GWARNING
Opening the hood when the engine is over-
heated or when there is a fire in the engine
compartment could expose you to hot gases
or other service products. There is a risk of
injury.
Let an overheated engine cool down before
opening the hood. If there is a fire in the
engine compartment, keep the hood closed
and contact the fire department.
GWARNING
The engine compartment contains moving
components. Certain components, such as
the radiator fan, may continue to run or start
again suddenly when the ignition is off. There is a risk of injury.
If you need to do any work inside the engine
compartment:
Rswitch off the ignition
Rnever reach into the area where there is a
risk of danger from moving components,
such as the fan rotation area
Rremove jewelry and watches
Rkeep items of clothing and hair, for exam-
ple, away from moving parts
GWARNING
The ignition system and the fuel injection sys-
tem work under high voltage. If you touch
components which are under voltage, you
could get an electric shock. There is a risk of
injury.
Never touch components of the ignition sys-
tem or fuel injection system when the ignition
is switched on.
Opening the hood
GWARNING
Certain components in the engine compart-
ment, such as the engine, radiator and parts
of the exhaust system, can become very hot.
Working in the engine compartment poses a
risk of injury.
Where possible, let the engine cool down and touch only the components described in the
following.
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 wip-
ers or the hood.
Engine compartment257
Maintenance and care
Z
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 handle ;
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.
Engine oil
General notes
Depending on your driving style, the vehicle
consumes up to 0.9 US qt (0.8 liters) of oil per
600 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 approx-
imately five minutes if the engine is at normal
operating temperature.
Rif the engine is not at normal operating tem-
perature, e.g. if the engine was only started
briefly, wait about 30 minutes before carrying
out the measurement.
Checking the oil level using the oil dip-
stick
GWARNING
Certain components in the engine compart-
ment, such as the engine, radiator and parts
of the exhaust system, can become very hot.
Working in the engine compartment poses a
risk of injury.
Where possible, let the engine cool down and touch only the components described in the
following.
XPull oil dipstick :out of the dipstick guide
tube.
XWipe off oil dipstick :.
XSlowly slide oil dipstick :into the guide tube
to the stop, and take it out again.
If the level is between MIN mark =and MAX
mark ;, the oil level is correct.
XIf the oil level has dropped to MIN mark =or
below, add 1.1 US qt (1.0 liter) of engine oil.
258Engine compartment
Maintenance and care
Rinseany acid spills immediately
wit hclear water. Contac t aphysician
if necessary.
Wear eye protection .
Keepchildren away.
Observ ethis Operator's Manual.
Fo rsafet yreasons, Mercedes-Ben zrecom-
mends that you only use batterie swhic hhav e
been tested and approve dfor your vehicl eby
Mercedes-Benz. These batterie sprovide
increased impact protection to preven tvehicl e
occupant sfrom suffering acid burn sshould th e
battery be damaged in th eevent of an accident.
In order for th ebattery to achiev eth emaximum
possibl eservic elife ,it mus talways be suffi-
ciently charged.
Lik eother batteries, th evehicl ebattery may
discharge ove rtime if you do no tuse th evehicle.
In this case, hav eth ebattery disconnected at a
qualified specialist workshop. You can also
charge th ebattery wit h acharge rrecommended
by Mercedes-Benz. Contac t aqualified special-
ist workshop for further information .
Hav eth ebattery condition of charge checke d
mor efrequentl yif you use th evehicl emainly for
short trips or if you leav eit standing idle for a
lengthy period. Consult aqualified specialist
workshop if you wish to leav eyour vehicl e
parked for alon gperiod of time.
Remove th eSmartKey if you park th evehicl e
and do no trequire any electrical consumers.
The vehicl ewill then use ver ylittl eenergy, thus
conserving battery p
ower
.
If th epower suppl yhas been interrupted, e.g. if
you reconnect th ebattery, you will hav eto :
Rset th eclock .Information on setting th eclock
can be foun din th eDigital Operator's Manual
On vehicles wit h amultimedia system, th e
time is set automatically.
Rreset th efunction for foldin gth eexterio rmir -
ror sin/out automatically, by foldin gth emir -
ror sout once (
Ypage 106)
Charging the battery
GWARNING
During charging and jump-starting ,explosive
gase scan escape from th ebattery. There is a
ris kof an explosion .
Particularly avoi dfire, open flames, creating
sparks and smoking. Ensur ethere is sufficien t
ventilation while charging and jump-starting .
Do no tlean ove r abattery.
GWARNIN G
Battery acid is caustic. There is aris kof injury.
Avoid contact wit hskin, eyes or clothing .Do
no tinhale any battery gases. Do no tlean ove r
th ebattery. Kee pchildren away from batter-
ies. Wash away battery acid immediately wit h
plenty of clean water and seek medical atten -
tion .
GWARNIN G
A discharged battery can freez eat tempera-
tures belo wfreezing point. When jump-start -
ing th evehicl eor charging th ebattery, gase s
can escape from th ebattery. There is aris kof
an explosion .
Allow th efrozen battery to thaw out before
charging it or jump-starting .
!Only use battery chargers wit h amaximum
charging voltag eof 14.8 V.
!Only charge th ebattery usin gth ejump-
starting connection point.
The jump-starting connection poin tis in th e
engin ecompartmen t (
Ypage 278).
XOpen thehood.
XConnect th ebattery charge rto th epositive
termina land ground poin tin th esam eorder
as when connecting th edonor battery in th e
jump-starting procedure (
Ypage 278).
If th eindicator/warning lamp sdo no tligh tup at
low temperatures ,it is ver ylikely that th edis-
charge dbattery has frozen .In this case, you
may neither charge th ebattery no rjump-start
th evehicle. The servic elife of athawed-out bat -
tery may be shorter. The starting characteristics
may be impaired, especially at low tempera-
276Battery (vehicle)
Breakdown assistance
Do not start the vehicle using a rapid charging device. If your vehicle's battery is discharged, the
engine can be jump-started from another vehicle or from a second battery using jumper cables.
Observe the following points:
RThe battery is not accessible in all vehicles. If the other vehicle's battery is not accessible, jump-
start the vehicle using a second battery or a jump-starting device.
RYou may only jump-start the vehicle when the engine and exhaust system are cold.
ROnly jump-start from batteries with a 12 V voltage rating.
ROnly use jumper cables which have a sufficient cross-section and insulated terminal clamps.
RIf the battery is fully discharged, leave the battery that is being used to jump-start connected for
a few minutes before attempting to start. This charges the battery slightly.
RMake sure that the two vehicles do not touch.
Make sure that:
Rthe jumper cables are not damaged.
Rwhen the jumper cables are connected to the battery, uninsulated sections of the terminal clamp
do not come into contact with other metal sections.
Rthe jumper cables cannot come into contact with parts which can move when the engine is
running, such as the V-belt pulley or the fan.
XApply the parking brake firmly.
XShift the transmission to position P.
XMake sure that the ignition is switched off. All indicator lamps in the instrument cluster must be
off. When using the SmartKey, turn the SmartKey to position 0in the ignition lock and remove it
(
Ypage 128).
XSwitch off all electrical consumers, e.g. rear window defroster, lighting, etc.
XOpen the hood.
Position number Bidentifies the charged battery of the other vehicle or an equivalent jump-starting
device.
XSlide cover :of positive terminal ;in the direction of the arrow.
XConnect positive terminal ;on your vehicle to positive terminal =of donor battery Busing the
jumper cable, always begin with positive terminal ;on your own vehicle first.
Jump-starting279
Breakdown assistance
Z
ist workshop, e.g. an authorized Mercedes-Benz
Center.
!Only use fuses that have been approved for
Mercedes-Benz vehicles and which have the
correct fuse rating for the system concerned.
Otherwise, components or systems could be
damaged.
!Make sure that no moisture can enter the
fuse box when the cover is open.
!When closing the cover, make sure that it is
lying correctly on the fuse box. Moisture seep-
ing in or dirt could otherwise impair the oper-
ation of the fuses.
The fuses in your vehicle serve to close down
faulty circuits. If a fuse blows, all the compo-
nents on the circuit and their functions stop
operating.
Before changing a fuse
Pay attention to the important safety notes
(Ypage 282).
XSwitch off the engine.
XSwitch off all electrical consumers.
XSecure the vehicle against rolling away
(Ypage 144).
XRemove the SmartKey from the ignition lock.
or, on vehicles with KEYLESS‑ GO:
XOpen the driver's door.
The on-board electronics now have status 0.
This is the same as the SmartKey having been
removed.
XRemove the Start/Stop button from the igni-
tion lock (Ypage 128).
All indicator lamps in the instrument cluster
must be off.
The fuses are located in various fuse boxes:
RFuse box on the driver's side of the dashboard
RFuse box in the engine compartment on the
left-hand side of the vehicle, when viewed in
the direction of travel
RFuse box in the trunk on the right-hand side of
the vehicle, when viewed in the direction of
travel
Dashboard fuse box
Pay attention to the important safety notes
(Ypage 282).
!Do not use a pointed object such as a screw-
driver to open the cover in the dashboard. You
could damage the dashboard or the cover.
!Make sure that no moisture can enter the
fuse box when the cover is open.
!When closing the cover, make sure that it is
lying correctly on the fuse box. Moisture seep-
ing in or dirt could otherwise impair the oper-
ation of the fuses.
XTo open: pull out cover :slightly at the bot-
tom in the direction of arrow =.
XPull cover:outwards in the direction of
arrow ;and remove it.
XTo close: clip in cover :on the front of the
dashboard.
XFold cover :inwards until it engages.
Fuse box in the engine compartment
Pay attention to the important safety notes
(Ypage 282).
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.
Fuses283
Breakdown assistance
Z
XMake sure that the windshield wipers are
turned off.
XOpen the hood (Ypage 257).
XUse a dry cloth to remove any moisture from
the fuse box.
XTo open:remove lines ;from the guides.
XMove lines ;aside. Route the lines behind
connection =to do this.
XOpen clamp :.
XRemove the fuse box cover forwards.
XTo close:check whether the seal is lying cor-
rectly in the cover.
XInsert the cover at the rear of the fuse box into
the retainer.
XFold down cover and close clamps :.
XSecure lines;in the guides.
XClose the hood.
Fuse box in the trunk
Pay attention to the important safety notes
(Ypage 282).
XOpen the trunk lid.
XTo open: raise trunk floor :(Ypage 243).
XSlightly push back floor covering with slits ;
at gap =and lift it up.
284Fuses
Breakdown assistance