2012 MERCEDES-BENZ M-Class battery

X
To dea ctivate :pre ssthe Ì/Á
bu tton.
The indicator lamp inthe Ì/Á
bu tton goesou t. i Re
sidu alhea tisdeactivated
automaticall y:
R after about30 minutes
R when theignition isswitched on
R ifthe battery voltage drops
R ifthe coolant temperature istoo low Setting
theairvents Importa
ntsafety notes G
WARNING When
operating theclimate control,the air
that enters thepassenger compartment
through theairvents canbevery hotorvery
cold (depending onthe settemperature). This
could cause burnsorfrostbite tounprotected
skin inthe immediate areaofthe airvents.
Always keepsufficient distancebetween
unprotected partsofthe body andtheair
vents. Ifnecessary, usetheairdistribution
adjustment todirect theairtoair vents inthe
vehicle interior thatarenot inthe immediate
area ofunprotected skin.
In order toensure thedirect flowoffresh air
through theairvents intothevehicle interior,
please observe thefollowi ngnotes:
R keep theairinlet grille onthe hood andin
the engine compartment onthe front -
passenger sidefreeofblockages, suchas
ice, snow orleaves.
R never covertheairvents orair intake grills
in the vehicle interior. i
For
virtually draft-free ventilation, adjust
the sliders ofthe airvents tothe cent er
position. Setting
thecenter airvents :
Center airvent, left
; Center airvent, right
= Center ventthumbwheel, right
? Center ventthumbwheel, left
X To open/c lose:turnthumbwheels =
and ?tothe right orleft. Setting
theside airvents X
To open/c lose:turn thumbwheel =upor
down. Setting
theglove boxairvent
When automatic climatecontrolisactivated,
the glove boxcanbecooled, forinstance to
cool itscont ents. Thelevel ofairflow depends
on the airflow andairdistribution settings.
At high outside temperatures, opentheair
vent andactivate the"cooling withair
dehumid ification" function. 134
Setting
theairventsClimate control

Smar
tKeypositions
Smar tKey g
Toremove theSmartK ey
1 Power supply forsome consumers, such
as the windshield wipers
2 Ignition (powersupplyforallconsumers)
and drive position
3 Tostart theengine
As soon asthe ignition isswitched on,allthe
indicator lampsinthe instrumen tcluster light
up. Ifan indic atorlamp doesnotgoout after
the engineisstart ed orifit light sup while the
vehic leisin mot ion, see(Ypage 271).
If the SmartKey isin posit ion0in the ignit ion
lock foranext ende dperiod oftim e,itcan no
long erbe turned inthe ignit ionlock .The
steering isthen locked. Tounlock, remove the
SmartK eyand reinsert itinto theignition lock.
The steering islocked whenyouremove the
SmartK eyfrom theignition lock.
X Remove theSmartK eywhen theengine is
switched off.
The starter battery couldotherwise be
discharged.
If you cannot turntheSmartK eyinthe ignition
lock, thestarter battery maynotbecharged
sufficiently.
X Check thestarter battery andrecharge itif
necessary (Ypage 340).
or
X Jump-start thevehicle (Ypage 341). i
The
SmartK eycan beturned inthe
ignition lockeven ifit is not thecorrect
SmartK eyfor the vehicle. Theignition isnot
switched on.The engine cannot bestarted.
KEY LESS-GO General
informat ion
Vehicles withKEYLE SS-GO are equipp edwith
aS martKey featuringanintegrated KEYLESS-
GO function andadetacha bleStart/St op
button.
The Start/St opbutton mustbeinserted inthe
ignitio nlock andtheKEYLESS-GO keymust
be inthe vehicl e.
Pressi ngthe Start/St opbutton severaltimes
in successi oncorrespond sto the differe nt
SmartKey positions inthe ignitio nlock. This
is only thecase ifyou arenot depressing the
brake pedal.
If you depress thebrake pedalandpress the
Start /Stopbutton ,the engine starts
immediately.
The Start /Stopbutton canberemoved from
the ignition lock.Then, youcan insert the
Smart Keyinto theignition lock. i
You
donot have toremove theStart /Stop
button fromtheignition lockwhen you
leave thevehicle. However, youshould
alwa ystake theSmart Keywith youwhen
leaving thevehicle. Thevehicle canbe
start edwith theStart /Stopbutton andthe
electric alequipment canbeoperated while
the Smart Keyisin the vehicle. Driving
139Driving and parking Z

Problems
withtheengine Problem Possible
causes/co nsequences andM Solutions
The
engine doesnot
start. Thestarter motor
can beheard. R
There isamalfunction inthe engine electron ics.
R There isamalfunction inthe fuel supply .
X Try tostart theengine again(Ypage 140). Avoid excessively
long andfrequent attemptsto start theengine asthese willdrain
the battery.
If the engine doesnotstart after several attempt s:
X Consult aqual ified specialist workshop, e.g.anauthorized
Mercedes-B enzCenter. The
engine doesnot
start. Youcannot hear
the starter motor. The
on-board voltageistoo low because thebattery istoo weak
or discharged.
X Jump-start thevehicle (Ypage 341).
If the engine doesnotstart despite attemptsto jump-st artit:
X Consult aqual ified specialist workshop, e.g.anauthorized
Mercedes-B enzCenter. The
starter motorwasexposed toathermal loadthatwastoohigh.
X Allow thestarter motortocool down forapproximately two
minutes.
X Try tostart theengine again.
If the engine stilldoes notstart:
X Consult aqual ified specialist workshop, e.g.anauthorized
Mercedes-B enzCenter. The
engine isnot
running smoothly and
is misfiring. There
isamalfunction inthe engine electron icsoramechanical
componen tof the engine management system.
X Only depress theaccelerator pedalslightly.
X Have thecause rectifiedimmediately ataqual ified specialist
workshop, e.g.anauthorized Mercedes-B enzCenter.
Otherwise, non-combusted fuelmay getinto thecatalytic
conv erter anddamage it. The
coolant
temperature gauge
shows avalue above
248 ‡(120 †). The
coolant levelistoo low. Thecoolant istoo hotand theengine
is no longer beingcooled sufficiently.
X Stop assoon aspossible andallow theengine andthecoolant
to cool down.
X Check thecoolant level(Ypage 315). Observe thewarning
notes asyou dosoand add coolant ifnecessary. Driving
143Driving and parking Z

Problems
withfuelandthefuel tank Problem Possible
causes/co nsequences andM Solutions
Fuel
isleaking fromthe
vehicle. G
Risk
ofexplosion orfire The
fuel lineorthe fuel tank isdefective.
X Turn theSmartK eytoposition 0(Ypage 139)inthe ignition lock
immediately andremove it.
X Do not restart theengine underanycircumst ances.
X Consult aqual ified specialist workshop. The
fuel filler flap
cannot beopened. The
fuel filler flapisnot unlocked.
or
The SmartK eybattery isdischarged.
X Unlock thevehicle (Ypage 72).
or
X Unlock thevehicle usingthemechanical key(Ypage 75). The
fuel filler flapisunlocked, buttheopening mechanism is
jammed.
X Consult aqual ified specialist workshop. The
engine willnot
start. The
fuel tank ofavehicle withadiesel engine hasbeen run
completely dry.
X Refuel thevehicle withatleast 5.3USqt(5liters) ofdiesel.
X Turn theignition onfor atleast 10seconds (Ypage 139).
X Start theengine continuously forupto10 seconds untilitruns
smoothly.
If the engine doesnotstart:
X Turn theignition onagain forapproximately 10seconds
(Y page 139).
X Start theengine againcontinuously forupto10 seconds until
it runs smoothly.
If the engine doesnotstart after three attempt s:
X Consult aqual ified specialist workshop. DEF
Import antnotes onuse To
funct ionproperly, BlueTECexhaustgas
aftert reatment mustbeoperated withthe
reducing agentDEF. When
theDEFs upply hasalmo strun out,th e Che
ckAdditiveSee Operator's Man
ual mes
sage issho wninthe
mult ifunction disp lay.
When theDE Fs upply sinks toamin imum
leve l,th e Rem
aining Starts:16 mes
sage
is sho wninthemult ifunction disp lay. 152
Ref
uelin gDriving and parking

i
If
depres singthebrake pedalthe first
time does notactivate theHOLD function,
wait briefly andthen tryagain. G
WARNING The
vehicle's brakesareappli edwhen the
HOLD functionisactivated. Forthis reason,
deactivate theHOLD functionifthe vehicle is
to be set inmotion byother means (e.g.ina
car wash orby towing).
Deactivating theHOLD function The
HOLD functionisdeactivated
automatically if:
R you accelerate andthetransmission isin
position Dor R.
R the transmission isin position P.
R you apply thebrakes againwithacertain
amount ofpressure until HOLD disappe
ars
from themultifunction display.
R you secure thevehicle usingtheelectric
parking brake.
R you activate DISTRONIC PLUS. i
Aft
eratime, theelectric parking brake
secures thevehicle andrelieves theservice
brake. G
WARNING Never
getout ofthe vehicle whentheHOLD
funct ionisactivated.
The HOLD functionmust never beoperated
or deactivated byapassenger orfrom outside
the vehicle.
The HOLD functiondoes notreplace the
electric parking brakeandmust notbeused
for parking.
The braking effectofthe HOLD functionis
canceled andthevehicle couldrollaway if:
R the HOLD functionisdeactivated by
depressing theaccelerator pedalorthe
brake pedal.
R there isamalfunction inthe system oran
interruption inthe power supply,e.g.
battery failure. R
the electrical systeminthe engine
compartmen t,the battery orthe fuses are
tampered with.
R the battery isdisconnec ted.
The electric parking brakeautomatically
secures thevehicle ifthe HOLD functionis
activated and:
R the driver's doorisopen andthedriver's
seat beltisunfastened.
R the engine isswitched off.
R asystem malfunction occurs.
R the power supply isnot sufficient.
On steep uphillordownhill inclinesorifthere
is amalfunction, thetransmission mayalso
automatically beshifted intoposition P. AIRMATIC
package
General notes AIRMATIC
enablesasuspension tuning
settin gto be selected andregulates the
damping behaviorandlevel ofyour vehicle.
The system comprises aminimum oftwo
componen ts:ADS (Adaptive Damping
System) (Ypage 180)andlevel control
(Y page 181). Yourvehicle mayalsobe
equipp edwith theActive Curve System
(Y page 181).
Observe thenotes ondriving withatrailer
(Y page 210).
ADS (Adaptive DampingSystem) General
notes
ADS adapts thedamping characterist icsto
the current operating anddriving situation.
This depends on:
R your driving style
R the road surface condition s
R the ADS settin g
R the vehicle levelsettin g
Your selection remainsstoredevenifyou
remove theSmartK eyfrom theignition lock. 180
Driving
systemsDriving and parking

Otherwise,
youand others couldbeinjured by
the ball coupling beingthrown around ifyou:
R brake sharply
R change direction suddenly
R are involved inan accident
X Open thestowage wellunder thecargo
compartment floor.
X Remove theprotective capfrom theball
coupling recess.
X Press theprotective capinto theball
coupling recessuntilitengages.
X Make surethattheprotective capisfirmly
in place.
X Store theball coupling inthe ball coupling
recess withthebolt andspring cotter
inserted. Tra
iler power supply
The trailer socket ofyour vehicle isequi pped
at the factory withapermanen tpower supply .
The permanent powersupply issupplied via
trailer socket pin4.
! You canconn ectaccessories witha
maximum powerconsumpt ionof240 Wto
the permanent powersupply.
You must notcharge atrailer battery using
the power supply.
The trailer's permanent powersupply is
switched offinthe event oflow vehicle supply
voltage andafter sixhours atthe latest.
You canobtain further informationabout
installing thetrailer electric sfrom aquali fied
specialist workshop, e.g.anauthorized
Mercedes-B enzCenter. Tr
ailer towing
219Driving and parking Z

Disp
laymessa ges Poss
iblecauses/c onseq uences and M Solu
tions The
yello w! warning lamp lightsup. The redF (USA
on ly)/ ! (Canadaonly) indic ato rlamp flashes for
appro ximately10 sec onds aftertheelec tric park ingbrak ehas
been applied orrele ased. Itth en goes outorrem ains lit.
The electric park ingbrak eis malf unctionin g.
X Swit choff theign ition and turnit back on.
X En gage theelec tric park ingbrak e.
If it is no tp ossible toengage theelectric parking brake:
X Shift thetrans mission toP.
X Visit aquali fiedspecialist workshop.
If it is not possible torelease theelectric parking brake:
X Release theelectric parking brakeautomatically (Ypage 156).
If the electric parking brakestillcann otbe released:
X Consult aquali fiedspecialist workshop. The
yellow !warning lamplights up.When yourelease orapply
the electric parking brakemanually ,the red F (USA
only)/ !(Canada only)indicator lampflashes.
The electric parking brakeismalfunct ioning.Itis not possible to
apply theelectric parking brakemanually .
X Shift thetrans mission toP.
X Visit aquali fiedspecialist workshop. F(USA
only)!(Canada
only) Pkg
Brake Inoperative The
yellow !warning lamplights up.The redF (USA
only)/ !(Canada only)indicator lampflashes for
approximately 10seconds aftertheelectric parking brakehas
been applied orreleased. Itthen goes outorremains lit.
The electric parking brakeismalfunct ioning,e.g.because of
overvoltage orundervoltage.
X Remove thecause forthe overvoltage orundervoltage, e.g.by
charging thebattery orrestart ingthe engine.
X En gage orrelease theelectric parking brake.
If it remains impossible toapply orrelease theelectric parking
brake:
X Switch offthe ignition andturn itback on.
X En gage orrelease theelectric parking brake.
If the electric parking brakestillcann otbe released:
X Consult aquali fiedspecialist workshop. Display
messages
243On-board computer and displays Z

Disp
laymessa ges Poss
iblecauses/c onseq uences and M Solu
tions G
Tel
eAid Ino
perative US
Ao nly:one ormor eof the mainfunctio nsinthe mbr ace system
ar ema lfunctio ning.
Ca nad aonl y:one ormor eof the mainfunctio nsofthe TELEAI D
sy stem arema lfunctio ning.
X USA only:ha ve the mbr ace system checked ataq ualifi ed
spec ialist workshop.
X Canad aon ly: have theTE LE AIDs ystem checke dat aqualif ied
spe cialist wor kshop . PRE
-SAFE Ino
perative See Ope
rator'sMan ual G
Ri
sk ofinjury Im
por tant fun ction sofPRE-SAFE ®
have failed .Alloth erocc upant
safet ysyst ems, e.g.airbags, remain available.
X Visit aqualified specialist workshop immed iately. PRE-
SAFE Func
tion Curr
ently Limi
tedSee Oper. Manu
al G
Risk
ofacciden t PRE-
SAFE®
Br ake istem porar ilyinope rative if:
R the DISTRON ICPLUS coverinthe radiat orgrill isdirt y.
R the sensors inthe bumper sare dirty.
R its func tion isimpaired duetoheavy rainorsno w.
R the radar sensor syst emistem porar ilyinope rative, e.g. due to
elect romagnet icradiat ionemit tedbynear byTV orradio
st ation sor oth ersourc esofelect romagnet icradiat ion.
R the syst emisouts idethe operat ingtem perat urerang e.
R the on-board voltage istoo low.
PRE- SAFE®
Br ake isoperat ionalagain andthedisplay message
disappears if:
R the dirt (e.g.slush) drops awaywhile thevehic leisin mot ion.
R the syst emdete ctsthat thesensors arefully available again.
R the syst emiswithin theoperat ingtem perat urerang e.
If the display messagecontinues tobe displayed:
X Clean theDISTRON ICPLUS coverinthe radiat orgrill
(Y page 322).
X Clean thebumper s(Y page 322).
X Restar tthe engine.
X Wait untilthebattery issufficiently charged. Display
messages
245On-board computer and displays Z