ignition MERCEDES-BENZ M-CLASS SUV 2011 Service Manual

air vents. The side air ven
ts canonly be
closed whe nthe con trols on the side air
vent sare turne ddownwards.
X Tur nthe key to position 2in the ignition
lock.
X Front control panel: press the_but-
ton repeatedly until the desired symbol
appears in the display.
X Rea rcontrol panel: press theMand/
or O button. Setting the airflow
X Turn the key to position 2in the ignition
lock.
X To increase: press theKbutton.
X To reduce: press theIbutton.
i You can use THERMOTRONIC automatic
climate control to set the airflow in the rear
compartmen tseparately. Switching the ZONE function on/off
X To switc hon:press the ábutton.
The indicator lam pintheá button lights
up.
THERMATI Cautomatic climate control: the
temperature setting for the driver' sside is
not adopted for the front-passenger side.
The temperature of the front-passenger
side is adopted for the rear compar tment.
THERMOTRONI Cautomatic climate con-
trol: the temperature setting for the driver's
side is not adopte dfor the front-passenger
side and the rea rcompartmen t.
When the button sorcontrols for tempera-
ture, airflow or air distribution ar eactivated,
the tempe rature setting for the driver's side
is not adopted for the othe rclimate control
zones. X
To switch off: press theábutton.
The indicator lamp in the ábutton goes
out.
The temperature setting for the driver's
side is adopted for the front-passenger side
and the rear compar tment. Demisting the windscreen
You can use this fun ction to defrost the wind-
screen or to demist the inside of the wind-
screen and the side windows.
i You should only select the demisting
function until the windscreen is clear again.
X Turn the key to position 2in the ignition
lock.
X To activate: press the¬button.
The indicator lamp in the ¬button lights
up.
The climat econtrol system switche stothe
followin gfunctions:
R cooling with air dehumidification on 10
R high airflow 11
R high temperature 11
R air distribution to the windscreen and
fron tside windows
R air-recirculation mode off
X To switch off: press the¬button.
The indicator lamp in the ¬button goes
out. The previously selected settings come
int oe ffect again .The cooli ngwith air dehu-
midification function remain son. Air-recir-
culation mode remain sdeactiva ted.
or
X Press the Ãbutton.
The indicator lamp in the ¬button goes
out. Airflow and air distribution are set to
automatic mode.
or
10 Only with engine run ning.
11 Depending on the outside temperature. Ope
rating th eclimate control system
127Climate control Z

X
Tur ncontrols :orB cloc kwise or anti-
clockwise (Y page 121), (Y page 121).
or
X Press the KorI button. Demisting the windows
Windows misted up on the inside X
Activate the ¿/Ácooling with air
dehumidification func tion.
X Activate automatic mode Ã.
X If the window scontinue to mist up, activa te
the demisting function (Y page 127).
i You should only select this setting until
the windscreen is clear again.
Windows misted up on the outside X
Activate the windscreen wipers.
X Press the _button repeatedly until the
P orO symbol appears in the dis-
play.
i You should only select this setting until
the windscreen is clear again. Rear window heating
Switchin gon/off G
WARNI
NG
Clear all windows of ice or snow before setting
off. Otherwise, impaired visibility could
endanger you and others.
The rear window heating has ahigh cur rent
draw. You should therefore switc hitoff as
soon as th ewindow is clear ,Ito therwise
switches off automatically after several
minutes.
If the battery voltage is too low, the rear win-
dow heati ngmay switch off. X
Turn th ekey to position 2in the ignition
lock.
X Press the ¤button.
The indicator lam pinthe¤ button lights
up or goes out.
Problems wit hthe rea rwindow hea ting The rea
rwindow heatin ghas switched off
prematurely or cannot be activated.
X Switch off any consumers that are not
required, e.g. readin glamps or interior
lighting.
When the battery is sufficiently charged,
the rear window heatin gisactivated again
automatically. Activating/deactivating air-recircula-
tion mode
You can deactivate the flow of fresh air if
unpleasant odours are entering the vehicle
from outside .The air already insid ethe vehi-
cle will then be recirculated.
The operation of air-recirculation mode is the
sam efor all contr ol panels. G
WARNING
Only swit chover to air-recirculation mode
briefly at low outside temperatures. Other-
wise, the window scould mist up, thus impair-
ing visibility and endan geringyoursel fand
othe rs.T his ma ypreve ntyou from observing
the traffic conditions, thereby causing an
accident.
X Turn the key to position 2in the ignition
lock.
X To activate: press thedbutton.
The indicator lam pint he d button lights
up.
i In the even tofhigh pollution levels 12
or at
high outside temperatures, air-recircula-
tion mode is automatically activated. When
air-recirculation mode is activated auto-
12 THERMOTRONIC automatic climate control only. 128
Operating the climate control systemClimate control

matically
,the indicator lam pint he d
button is not lit.
Outside air is added after about 30
minutes.
X To switch off: press thedbutton.
The indicator lam pint he d button goes
out.
i Air-recirculation mode deactivates auto-
matically:
R after approximately fiv eminutes at out-
side temperatures below approximately
5†
R after approximately five minutes if cool-
ing with air dehumidification is deactiva-
ted
R after approximately 30 minutes at out-
sid etemperatures above approximately
5†
R if you press the ¿/Ábutton and
switch on cooling with air dehumidifica-
tion Convenienc
eopening/closin gusing
th ea ir-recirculation button G
WARNING
Make sure that nobody can become trapped
between the side window and the door frame
as the side windows are opened and closed.
Make sure that all object sand bod yparts are
clear of the side windows when they are being
opened or closed. You or the objects could be
drawn in or become trapped between the side
window and the door fram easthe window
moves. If ther eisariskofe ntrapment, oper-
ate the Wswitchto move the side window
in the opposite direction.
Make sure that nobody can become trapped
as the sliding sunroof/panorama sliding sun-
roof is ope neda nd closed. If there is arisk of
entrapment, operat ethe 3 switchtom ove
the sliding sunroof/panorama sliding sunroof
in the opposit edirection. X
Convenience closing feature: press and
hold the dbutton until the side win-
dows and the sliding sunroof/panorama
sliding sunroof are closed.
The indicator lamp in the dbutton lights
up. Air-recirculation mode is activated.
X Convenience opening feature: press and
hold the dbutton until the side win-
dows and the sliding sunroof/panorama
sliding sunroof are opened. The side win-
dows and the sliding sunroof/panorama
sliding sunroof move back to their original
position.
The indicator lamp in the dbutton goes
out. Air-recirculation mode is deactivated.
i If you open the side windows or the sliding
sunroof/panorama sliding sunroof man-
ually after closin gthemw ith the conveni-
enc eclosing feature, they will remain in this
position when opened using the conveni-
enc eopening feature. Activating/deact
ivatingthe residual
heat function
It is possibl etomakeu se of the residual heat
of the engine to continue heatin gthe station-
ar yv ehicle for up to 30 minutes after the
engine has been switched off .The heating
tim edepends on the temperature that has
been set.
i The blower will run at alow speed regard-
less of the airflow setting.
i If you activate the residual heat func tion
at high temperatures, only the ven tilation
will be activated. The blower runs at
medium speed.
X Turn the key to position 0in the ignition
lock or remov eit.
X To activate: press theÌ/Á button.
The indicato rlamp in the Ì/Á but-
ton lights up. Operating the climate control system
129Climate control Z

X
To deactivate: press theÌ/Á but-
ton.
The indicator lamp in the Ì/Ábut-
ton goe sout.
i Residual hea tisdeactivated automati-
cally:
R after about 30 minutes
R when the ignition is switched on
R if the batter yvoltage drops
R if the coolant temperatur eistoo low Auxiliar
yheating
Important safety notes G
WARNING
Exhaust fumes are produced when the auxili-
ary heating is in operation. Inhalin gthese
exhaust fumes can be poisonous. You should
therefor eswitch off the auxiliary heating in
confined spaces without an extraction sys-
tem, e.g. agarage. G
WARNING
When operating the auxiliary heating, parts of
the vehicle may become very hot, and highly
inflammable material such as fuels could be
ignited. Operating the auxiliary heating is thus
prohibited at filling stations or when your vehi-
cle is being refuelled .You must therefore
switc hoff the auxiliary heating at filling sta-
tions.
! Operatin gthe auxiliary heating/ ventila-
tion draws on the vehicl ebattery. After you
have heated or ventilated the vehicle a
maximum of two times, drive for alonger
distance.
i Switch on the auxiliary heatin gregularly,
e.g. for about ten minutes ever ymonth.
The auxiliary heatin gheats the air in the vehi-
cle interior to the set temperature without
using the heat of the runnin gengine .The aux-
iliary heating is operated directly usin gthe
vehicle' sfuel. For this reason, the tank con- tent must be at least at reserve fuel level to
ensure that the auxiliary heating functions.
The auxiliary heating/ventilation automati-
cally adjusts to changes in temperature and
weather conditions. For this reason, the aux-
iliary heating could switch from ventilation
mode to heating mode or from heating mode
to ventilation mode.
The auxiliary heating switches off when the
engine is switched off. The auxiliary ventila-
tion switches off when you turn the key to key
position 2.
The auxiliary heating switches off automati-
cally after 30 minutes. This time limit can be
altered. To do this, visit aqualified specialist
workshop, e.g. aMercedes-Benz Service
Centre.
You can notu se the auxiliary ven tilation to
cool the vehicle interior to atemperature
lower than the outside temperature.
Before switching on X
Turn the key to position 2in the ignition
lock.
X Set the temperature.
The auxiliary heating/ventilation can be acti-
vated even when the climate control is being
controlled manually. Optimum comfor tcan
be attained when the system is set to auto-
matic mode. Set the temperature to 22 †.
The auxiliary heating/ventilation can be acti-
vated or deactivated using the remote control
or the button on the centre console.
The on-board computer can be used to spec-
ify up to three departure times, one of which
may be preselected (Y page 250).130
Operating the climate control systemClimate control

roa
ds. Othe rwise,you could dam aget he
drive train. Key positions
Key g
To remove the key
1 Power supply for some consumers, such
as the windscreen wipers
2 Ignition (power supply for all consumers)
and drive position
3 To start the engine
i If the key does not belong to the vehicle,
it can still be turned in the ignition lock.
However ,the igni tion will not be switched
on The engin ecannot be started.
KEYLESS-GO Genera
lnotes
Vehicles with KEYLESS-GO are equipped with
ak ey featuri ngan integrated KEYLESS-GO
function and adetachable Start /Stopbutton.
The Start/Stop button must be inserted in the
ignition lock and the KEYLESS-GO key must
be in the vehicle.
Pressi ngthe Start/Stop button several times
in successio ncorresponds to the different
key position sinthe igni tion lock .This is only
the case if you ar enot depressing the brake
pedal.
If you depress the brake pedal and press the
Start/S topb utton, the engine starts immedi-
ately. X
Position 0:ifStart/Stop button :has not
yet bee npressed, this correspond stothe
key being removed from the ignition.
X Position 1:pressStart/Stop button :
once.
You can now activate the windscreen wip-
ers, for example.
i If you press Start/Stop button :twice
when in this position, the powe rsupply is
deactivated again.
X Position 2(ignition): press Start/Stop but-
ton :twice.
i If you press Start/Stop button :once
when in this position and the driver' sdoor
is open, the power supply is deactivated
again.
Removing th eStart/Stop button
You can remove the Start/Stop butto nfrom
th ei gnition lock and star tthe vehicle as nor-
ma lusing the key.
i You do not hav etoremov ethe Star t/Stop
butto nfrom th eignition lock when you
leav ethe vehicle.
i It is only possible to switc hbetween KEY-
LE SS -GO mode and key operation whe nthe
transmission is in position P. Driving
139Drivingand park ing Z

X
Remov eStart/Stop button :from ig nition
lock ;.
i When you insert Star t/Stopbutton:
int oignition lock ;,thesystem needs
approximately two seconds recognition
time before you ca nuse Star t/Stop but-
ton :. Startin
gthe engine
Important safety notes G
WARNING
Never leav ethe engin erunnin ginenclosed
spaces. The exhaust gase scontai ncarbon
monoxide. Inhalin gexhaust fumes consti-
tutes ahealt hhazard and could lead to loss
of consciousness or eve ndeath.
i Vehicles with apetrol engine: the cata-
lytic conver terp reheats for up to 30 sec-
ond safter acold star t.The sound of the
engin emay change during this time.
Automatic transmission X
Shift the transmission to position P.
The transmission position displ ay inthe
multifunction displa yshows P
(Y page 146).
i You can also star tthe engin ewhen the
transmission is in position N.Sta
rting procedur ewith the key X
To star tapetrol engine: turn the key to
position 3in the ignition lock
(Y page 139 )and releas eita ss oon as the
engin eisrunning.
X To star tadiesel engine: turn the key to
position 2in the ignition lock
(Y page 13 9).
The % preglow indicator lam pinthe
instrumen tcluster lights up.
X When the %preglow indicator lamp
goes out, tur nthe key to position 3
(Y page 139) and release it as soon as the
engin eisrunning.
i You can start the engine without preglow
if the engine is warm.
i You can also use the touch-star tfunction.
To do this, turn the key to position 3
(Y page 139 )and releas eitimmediately.
Th ee ngine then starts automatically.
Using KEYLESS-GO to start the engine G
WARNING
You rvehicle can be star tedu sing avalid KEY-
LESS-GO key. For this reason, children should
never be left unsupervised in the vehicle.
Always take the key with you when leaving the
vehicle, even if you are only leaving it for a
short time.
i The Start/Stop button can be used to
start the vehicle without inserting the key
into the ignition lock. The key must be in
the vehicle and the Start/Stop button must
be inserted in the ignition lock. This mode
for starting the engine operates independ-
ently of the ECO start/stop automatic
engine start function. 140
DrivingDrivin
gand parking

X
Take your foot off the brake pedal.
i Onc eyou have taken your foot off the
brake pedal, the vehicle is held for around
one second.
X Pull away.
Hill star tassist will not func tion if:
R you ar epulling away on alevel road or a
downhill gradient.
R the transmission is in position N.
R the electric parking brak eisapplied.
R ESP ®
is malfunc tioning. ECO sta
rt/stop function
General notes The ECO start/stop func
tion switches the
engin eoff automatically if th evehicle stops
moving.
The engine star tsautomatically when you pull
away again. The ECO start/stop function
thereby helps you to reduce the fuel con-
sumption and emissions of your vehicle.
The ECO start/stop function is activated each
time the engine is switched on. The system is
operational when ECO symbol ¤is shown
in the multifunc tion display.
If the ECO star t/stop func tion is deactivated
(Y page 143), ECO symbol ¤is not
shown. G
WARNING
If the ECO symbol appears in the multifunc-
tion displa ywhen the engin eisswitched off,
the engine was switched off automatically.
However, all vehicle systems remain active. If
you open the door, unfasten your seat belt or
remove your foot from the brake pedal, the
engine will automatically start .The vehicle
ma ybegin moving. There is arisk of accident.
To prevent the vehicle from accidentally pull-
ing away, do not release the brake pedal until
you want to drive on. Do not leave the vehicle until you have
switched off the ignition and secured the vehi-
cle to prevent it from rolling away.
! Always switch the ignition off and take the
key with you when leaving the vehicle.
Automa tice ngine switch-off The ECO start/stop function switches the
engin
eoff automatically in certain situations.
To do this ,the vehicle must brake to astand-
still and the brakes must remain depressed
with the transmission in position Dor N.
The engine is only switched off if:
R the vehicle is at astandstill.
R the outside temperature is withi nthe range
that is suitable for the system.
R the engin eisatnormal operatin gtemper-
ature.
R the set temperature for the vehicle interior
has been reached.
R the batter yissufficiently charged.
R the system detects that the windscreen is
not misted up when the air-conditioning
system is switched on.
R the bonnet is closed.
R the driver' sdoor is closed and the seat belt
is fastened.
i If you shift the transmission from Rto D,
the ECO start/stop func tion is available
again onc ethe ¤ ECO symbol reap-
pear sint he multifunction display.
i The engin ecan be switched off automat-
ically amaximum of three times in succes-
sion. The automatic engine switch-off is
then available again after the ¤ECO
symbol appears in the multifunction dis-
play.
i You can still activate the HOLD function
when the vehicle is stationary, even if the
engine has been switched off automati-
cally. It is then not necessary to continue
applying the brakes during the automatic
stop phase .When you depress the accel- 142
DrivingDriving and parking

Problems wit
hthe engine Problem Possible causes/consequences and
M Solutions
Th
ee ngine doe snot
start. The starter motor
can be heard. R
There is amalfunction in the engine electronics.
R There is amalfunction in the fuel supply.
X Before attempting to start the engine again, turn the key in the
ignition back to position 0or press the Start/Stop button
repeatedly until all indicator lamps in the instrumen tcluster go
out.
X Try to start the engin eagain (Y page 14 0).A void excessively
long and frequen tattempt stostartthe engine, as this will drain
the battery.
If the engine doe snot star tafter several attempts:
X Consult aqualified specialist workshop, e.g. aMercedes-Benz
Servic eCentre. The engine does not
start .The starter motor
can be heard. The
reserve fuel warning
lam pisl it and the fuel
gauge displa yshows 0. The fuel tan
kise mpty.
X Refue lthe vehicle. The engin
edoes not
start. You cannot hear
the starter motor. The on-boar
dvoltage is too low because the battery is too weak
or discharged.
X Jump-start the vehicle (Y page 348).
If the engin edoes not star tdespite attempt stojump-start it:
X Consult aqualified specialist workshop, e.g. aMercedes-Benz
Servic eCentre. The starter motor was exposed to
athermal load that was too high.
X Allo wthe starter motor to cool down for approximatel ytwo
minutes.
X Try to start the engine again.
If the engine still does not start:
X Consult aqualified specialist workshop, e.g. aMercedes-Benz
Servic eCentre. 144
DrivingDriving and parking

Problems wit
hthe transmission Problem Possible causes/consequences and
M Solutions
Th
et rans mission has
problem sshifting gear. The transmission is losing oil.
X Hav ethe transmission chec kedataq ualified specialist work-
shop, e.g. aMercedes-Benz Servic eCentre, immediately. The acceleration ability
is deteriorating.
The transmission no
longer changes gear. The transmission is in emergency mode.
It is only possible to shift into
secondgear and reverse gear.
X Stop the vehicle.
X Shif tthe transmission to position P.
X Switc hoff th eengine.
X Wait at leas t10seconds befor erestar tingthe engine.
X Shift the transmission to position Dor R.
If D is selected, the transmission shifts into secondgear; ifRis
selected, the transmission shifts into reverse gear.
X Have the transmission checked at aqualified specialist work-
shop, e.g. aMercedes-Benz Servic eCentre, immediately. Refuelling
Important safety notes
G
WARNING
Fuel is highly flammable. Fire, naked flames
and smoking are therefor eprohibite dwhen
handling fuels.
Switch off the engin eand the auxili aryh eating
befor erefuelling. G
WARNING
Do not com einto contact with fuels.
It is hazardous to your health if your skin
comes into direct contact with fuels or you
breath einfuel vapours. G
WARNING
Do not use petrol to refuel vehicles with adie-
sel engine. Do not mix diesel with petrol. This
would result in damage to the fuel system and
engine, which could lead to avehicle fire.
! Do not use petrol to refuel vehicles with a
diesel engine. Do not use diesel to refuel vehicles with
apetrol engine. Even small
amounts of the wron gfuel result in damage
to the fuel system and the engine.
! Do not switch on the ignition if you acci-
dentally refuel with the wrong fuel. Other-
wise, the fuel will enter the fuel lines. Notify
aq ualified specialist worksho pand have
the fuel tank and fuel lines drained com-
pletely. Petro
l(EN 228, DIN 51626)
Fuel grade !
Only refuel using unleaded premium-
grade petrol with at least
95 RON/8 5MON, whic hconform stoEuro-
pean standard EN 228 or an equivalent
specification.
! Do not use the following:
R E85 (petrol with 85% ethanol)
R E10 0(100% ethanol)
R M15 (petro lwith 15% methanol) 152
RefuellingDriving and parking

KEYLESS-GO: open th
edriver's door. This
switche sthe ignition to positi on0,w hich
corresponds to having removed the key.
The driver's door can be closed again.
X Press the fuel filler fla pint he direction of
arrow :.
The fuel filler fla pswings up.
X Turn the fuel filler cap anti-clockwise and
remove it.
X Insert the fuel filler cap into the holder
bracket on the inside of filler flap ;.
X Completely insert the pump nozzle into the
filler neck and refuel.
X Only fill the tank until the pump nozzle
switches off.
! Overfilling the fuel tank could damag ethe
fuel system.
Closing X
Replace the fuel filler cap and tur nitclock-
wise .The fuel filler cap audibly engages.
X Close the fuel filler flap. Refuelling
155Drivingand park ing Z