2012 MERCEDES-BENZ M-Class battery

The
KEYLE SS-GO funct ionischanged as
follows:
X To unlock thedriver 'sdoor: touch the
inner surface ofthe door handle onthe
driver's door.
X To unlock centrally: touchtheinner
surface ofthe door handle onthe fron t-
passenger doororthe rear door.
X To lock centrally: touchtheouter sensor
surface onone ofthe door handles. Restoring
thefactor ysettings
X Press the% and& button s
simultaneously forapproximately six
seconds untilthebattery checklamp
flashes twice. Mechanical
key
General notes If
the vehicle cannolonger beunlocked with
the Smart Key,usethemechanic alkey.
If you usethemechanic alkey tounlock and
open thedriver's door,theanti- theft alarm
system willbetriggered (Ypage 68).
There areseveral waystoturn offthe alarm:
X To turnthe alarmoff with the
Smar tKey: pressthe% or& button
on the Smart Key.
or
X Insert theSmart Keyinto theignition lock.
or
X To deactivat ethe alarmwith KEYL ESS-
GO: press theStart/S topbutton inthe
ignition lock.TheSmart Keymust beinthe
vehicle.
or
X Lock orunlock thevehicle usingKEYLE SS-
GO. TheSmart Keymust beoutside the
vehicle. Removing
themechanical key X
Push release catch: inthe direction of
the arrow andatthe same time,remove
mechanic alkey ;from theSmart Key. Smar
tKeybattery
Impor tantsafety notes Have
thebatteries changedataquali fied
specialist workshop. G
WARNIN
G Batt
eries containtoxicsubstances .
Swallowing batteriescanlead toserious
health issues ordeath.
Keep batteries outofthe reach ofchildren.
Seek medical attentionimmediately ifa
battery isswallowed . G
WARNIN
G The
Smart Keybatteries containperchlorate
material, whichmayrequire specialhandling
and regard forthe environ ment.Observe
governm entdisposal guidelines. California
resident s,see www .dtsc.ca.gov/
Haza rdousW aste/Perchlora te/
index.cfm. Sma
rtKey
75Opening/closing Z

Check
ingthebat tery X
Pre ssthe& or% button.
The battery iswork ingproperl yif bat tery
ch eck lamp :light sup brie fly
If bat tery check lamp :does notlight up
brief lydurin gthe test,the batt eryis
disch arged.
X Changin gthe batt ery(Ypage 76) i
You
canobtain the batt eryataqualified
spec ialist workshop. i
If
the SmartKey batteryischec kedwithin
the sign alrec eptio nrang eof theveh icle,
pres singth e& or% buttonloc ksor
unlo cksth eveh icle.
Cha nging thebat tery You
requi reaCR 2025 3V cel lbat tery.
X Tak eth emec hanical keyout ofthe
Sm artKey (Ypage 75). X
Pre ssmec hanical key; intoth eopen ing
in theSm artKey inthedire ction ofthe arr
ow untilbat tery tray cover :open s.
When doingso, donoth old cover :shut.
X Remove batterytraycover :. X
Repeatedly tapthe Smart Keyagainst your
palm untilbattery =falls out.
X Insert thenew battery withthepositive
termin alfacing upwards. Usealint- free
cloth todo so.
X Make surethatthesurface ofthe battery is
free from lint,grease andallother forms of
cont amination.
X Insert thefront tabsofbattery tray
cover :and then press toclose it.
X Insert themechanical keyinto the
Smart Key.
X Check thefunct ionofall Smart Keybutton s
on the vehicle. 76
Sma
rtKeyOpening/closing

Problems
withtheSmar tKey Problem Possible
causes/co nsequences andM Solutions
You
cannot lockor
unlock thevehicle
using theSmartK ey. The
SmartK eybattery isdischarged ornearly discharged.
X Try again tolock/un lockthevehicle usingtheremote control
funct ionofthe SmartK ey.Point thetipofthe SmartK eyatthe
driver's doorhandle fromclose range andpress the%/
& button.
If this does notwork:
X Check theSmartK eybattery (Ypage 76)and replace itif
necessary (Ypage 76).
X Lock (Ypage 80)orunlock (Ypage 80)thevehicle using
the mechanical key. The
SmartK eyisfaulty.
X Lock (Ypage 80)orunlock (Ypage 80)thevehicle using
the mechanical key.
X Have theSmartK eycheck edataqual ified specialist workshop. You
cannolonger lock
or unlock thevehicle
using KEYLE SS-GO. There
isinterf erence fromapowerful sourceofradio waves.
X Lock/ unlock thevehicle usingtheremote controlfunct ionof
the SmartK ey.Point thetipofthe SmartK eyatthe driver's door
handle fromclose range andpress the%/& button. There
isamalfunction withKEYLE SS-GO.
X Lock/ unlock thevehicle usingtheremote controlfunct ionof
the SmartK ey.Point thetipofthe SmartK eyatthe driver's door
handle fromclose range andpress the%/& button.
X Have KEYLE SS-GO check edataqual ified specialist workshop.
If this does notwork:
X Check theSmartK eybattery (Ypage 76)and replace itif
necessary (Ypage 76).
X Lock (Ypage 80)orunlock (Ypage 80)thevehicle using
the mechanical key. You
have losta
SmartK ey. X
Have theSmartK eydeactivated ataqual ified specialist
workshop.
X Report theloss immediately tothe vehicle insurers.
X Ifnecessary, havethelocks changed aswell. You
have lostthe
mechanical key. X
Report theloss immediately tothe vehicle insurers.
X Ifnecessary, havethelocks changed aswell. Smar
tKey
77Opening/closing Z

Problem Possible
causes/co nsequences andM Solutions
The
engine cannot be
started usingthe
SmartK ey. The
on-board voltageistoo low.
X Switch offnon- essential consumers, e.g.seat heating orinterior
lighting, andtrytostart theengine again.
If this does notwork:
X Check thestarter battery andcharge itifnecessary
(Y page 338).
or
X Jump-start thevehicle (Ypage 341).
or
X Consult aqual ified specialist workshop. The
engine cannot be
started usingKEYLE SS-
GO. TheSmartK eyisin
the vehicle. Ad
oor isopen. Therefore, theSmart Keycann otbe detect edas
easily .
X Close thedoor andtrytostart thevehicle again. There
isinter ferenc efrom apowerful sourceofradio waves.
X Start yourvehicle withtheSmart Keyinthe ignition lock. Doors
Import
antsafety notes G
WARNIN
G When
leaving thevehicle, alwaysremove the
Smart Keyfrom theignition lock.Always take
the Smart Keywith youand lock thevehicle.
Do not leave children unsupervised inthe
vehicle, evenifthey aresecured inachild
restraint system,anddonot give them access
to an unlocked vehicle.Achild's unsupervised
access toavehicle couldresult inan accident
and/or serious personal injury.Theycould:
R injure themselves onvehicle parts
R be seriously orfatally injured byextrem e
heat orcold
R injure themselves orhave anaccident with
vehicle equipment thatmay stillbein
operation evenaftertheSmartKey has
been removed fromtheignition, suchasthe
seat adjustment ,steering wheel
adjustment ormemory function. If
children openadoor, theycould cause
severe oreven fatalinjury toother persons; if
they getout ofthe vehicle, theycould injure
themselves whendoing soorbe seriously or
even fatally injured byany passing traffic.
Do not expose thechild restraint systemto
direct sunlight. Thechild restraint system's
metal parts, forexample, couldbecome very
hot, andachild could beburned onthese
parts. G
WARNING Do
not carry heavy orhard object sin the
passenger compartmen tor cargo
compartmen tunle ssthey arefirmly secu red
in place .
Unse curedorimp roperlypo sitio ned cargo
incre ases achi ld's ris kof inju ryinthe event
of
R stro ngbra king maneu vers
R sudd en cha nges ofdirecti on
R an acci dent 78
Do
orsOpening/closing

Problems
withtheseat heating The
seat heating hasswitched off
prematurely orcannot beswitched on.The
vehicle's electrical systemvoltage istoo low
because toomany electrical consumers are
switched on.
X Switch offelectrical consumers whichyou
do not need, suchasthe rear window
defroster orinterior lighting. Switching
theseat ventilation on/off
Switching on/off The
three blueindicator lampsinthe buttons
indicate thevent ilation levelyouhave
selected. i
If
the battery voltage istoo low, theseat
vent ilation mayswitch off. X
Make surethattheSmartK eyisin position
2 in the ignition lock.
X To switch on:press button :repeatedly
until thedesired ventilation levelisset. i
You
canopen theside windows andthe
sliding sunroof usingthe"Convenience
opening" feature(Ypage 86).Theseat
vent ilation ofthe driver's seat
automatically switchestothe highest level.
X To switch off:press button :repeatedly
until allthe indicator lampsgoout. Problems
withtheseat ventilation The
seat ventilation hasswitched off
prematurely orcannot beswitched on.The
vehicle's electrical systemvoltage istoo low
because toomany electrical consumers are
switched on.
X Switch offelectrical consumers whichyou
do not need, suchasthe rear window
defroster orinterior lighting. Steering
wheel Import
antsafety notes G
WARNING Do
not adjust thesteering wheelwhiledriving.
Adjust ingthe steering wheelwhiledriving, or
driving without thesteering wheeladjustment
feature lockedcouldcause thedriver tolose
cont rolofthe vehicle.
The electrical steeringwheeladjustment
feature canbeoperated atany time.
Therefore, donot leave children unattended
in the vehicle, orwith access toan unlocked
vehicle. Achild's unsupervised accesstoa
vehicle couldresult inan accident and/or
serious personal injury. 100
Steering
wheelSeats, steering wheel and mirrors

The
system cannotrecogn izethe following
road users:
R Road users without alighting systemof
their own, e.g.pedestrians
R Road users withdimlighting oftheir own,
e.g. cyclists
R Road users whose lighting isobstruct ed,
e.g. road users behind aguardrail
R Insome seldom cases,evenroadusers with
a lighting systemoftheir ownmay be
recogn izedtoolate ornot atall.
The automatic high-beam headlamps willthen
not bedeactivated oritwill beactivated in
spite ofpreceding oroncom ingroad users.
This could endanger youand/or othersand
cause anaccident .Always payclos eatt ent ion
to the traffic situat ionand switc hoff the high
beam manually ifnec essary. Head
lampsfogged upontheinside
The headlamps mayfogupon the inside if
the reishigh atmo spher ichumidit y.
X Dr ive with theheadlamps switchedon.
The level ofmoist uredimin ishes,
depen dingonthe lengt hof the jour ney and
the weather condition s(humidit yand
tem perat ure).
If the level ofmoist uredoes notdimin ish:
X Have theheadlamps checkedataqualified
spec ialist workshop. Inter
iorlight ing Over
view ofinter iorlight ing Over
head control panel
: p Toswitc hthe left-han dfro ntreadin g
lamp on/off
; c Toswitc hthe frontinterior lighting
on
= v Toswitc hthe rear interior lighting
on/ off
? | Toswitc hthe frontint erior lighting/
autom aticinterior lightingcon trol off
A p Toswitc hthe right -handfront
read inglamp on/off
B Toswi tch the automatic interiorlighting
control on Inte
rior lighting control
Important notes In
order toprevent thevehicl e'sbattery from
discha rging,theinterior lighting functions are
au tomatical lydea ctivated aftersome time
except forwhen theSmartKey isin posi tion
2 in the ignitio nlock.
The color andbrigh tness ofthe ambi ent
lig hting maybeset using the on-board
computer (Ypag e234).
Automatic interiorlight ingcontr ol X
To switch on:setthe rocker switc hto
cen terposit ionB. Inter
iorlight ing
113Lights and windshield wipers Z

X
To switchof f:pre ssthe ¬ button.
The indicator lamp inthe ¬ button goes
ou t.The previouslysel ecte dsettings come
int oeffec tagain. Thecooling withair
dehumidification functionremains on.Air-
recirculation moderemains deactivated.
or
X Press theà button .
The indicator lampinthe ¬ button goes
out. Airflow andairdistribution aresetto
automatic mode.
or
X Turn controls:orB clock wiseor
count er-clockwise (Ypage 123),
(Y page 123).
or
X Press theK orI button . Switching
maximumcool ingMAX
COOL on/off
The MAX COOL functionisonly availa blein
vehicles forthe USA .
MAX COOL isonly operational whenthe
engine isrunnin g.
When youactivate MAXCOOL, climate
cont rolswitches tothe following functions:
R maximum cooling
R maximum airflow
R air-recirc ulationmodeon
X To activat e:press theÙ button .
The indicator lampinthe button lightsup.
X To deactivat e:press theÙ button
again.
The indicator lampgoesout.Thepreviously
selected settings come intoeffect again. Defrosting
thewindows
Windows foggeduponthe inside X
Act ivate the¿/Á coolingwithair
dehumidification function.
X Act ivate automatic modeÃ.
X Ifthe windows continue tofog up,activate
the defrostin gfunct ion(Ypage 131). i
You
should onlyselect thissettinguntil
the windshield isclear again.
Windows foggeduponthe outside X
Act ivate thewindshield wipers.
X Press the_ button repeatedly untilthe
P orO symbol appears inthe
display . i
You
should onlyselect thissettinguntil
the windshield isclear again. Rear
window defroster
Activating/deactivat ing G
WARNING Any
accumulation ofsnow andiceshould be
removed fromtherear window beforedriving.
Visibility couldotherwise beimpaired,
endangering youand others.
The rear window defroster hasahigh current
draw. Youshould therefor eswitch itoff as
soon asthe window isclear asitonly switches
off automatically afterseveral minutes.
If the battery voltage istoo low, therear
window defroster mayswitch off.
X Turn theSmart Keytoposition 2in the
ignition lock.
X Press the¤ button .
The indicator lampinthe ¤ button lights
up orgoes out. 132
Opera
tingtheclimate controlsystemClimate control

Problems
withtherear window
defroster The
rear window defroster hasdeactivated
itself prematurely orcannot beactivated.
X Switch offany consumers thatarenot
required, e.g.reading lampsorinterior
lighting.
When thebattery issufficiently charged,
the rear window defroster isactivated
again automatically. Activating/deactivating
air-
recirculation mode
You candeactivate theflow offresh airif
unpleasant odorsareenterin gthe vehicle
from outside. Theairalready insidethe
vehicle willthen berecirculated.
The operation ofair-recirculation modeisthe
same forallcont rolpanels. G
WARNING Fogged
windows impairvisibility,
endangering youand others. Ifthe windows
begin tofog onthe inside, switching offthe
air recirculation modeimmediately should
clear interior window fogging. Ifinterior
window foggingpersists, makesuretheair
condition ingisactivated, orpress the¬
button.
X Turn theSmartK eytoposition 2in the
ignition lock.
X To activate: pressthed button.
The indicator lampinthe d button lights
up. i
In
the event ofhigh pollu tionlevels 13
or at
high outside temperatures, air-
recirculation modeisautomatically
activated. Whenair-recirculation modeis
activated automatically ,the indicator lamp
in the d button isnot lit.
Outside airisadded afterabout 30
minutes. X
To switch off:press thed button.
The indicator lampinthe d button goes
out. i Air-r
ecirculation modedeactivates
automatically :
R after approximately fiveminutes if
outside temperatures areless than about
41 ‡(5 †)
R after approximately fiveminutes if
cooling withairdehumidi ficationis
deactivated
R after approximately 30minutes ifoutside
temperatures areover about
41 ‡(5 †)
R ifyou press the¿/Á buttonand
switch oncooling withair
dehumidi fication Activating/deactivating
theresidual
heat function
The residual heatfunct ionisonly availa blein
Canada
It is possible tomake useofthe residual heat
of the engine tocont inue heating the
stationary vehicleforupto30 minutes after
the engine hasbeen switched off.The heating
time depends onthe temperature thathas
been set. i
The
blower willrun atalow speed
regardless ofthe airflow setting. i
If
you activate theresidual heatfunct ion
at high temperatures, onlythevent ilation
will beactivated. Theblower runsat
medium speed.
X Turn theSmartK eytoposition 0in the
ignition lockorremove it.
X To activate: presstheÌ/Á button.
The indicator lampinthe Ì/Á
button lightsup.
13 Automatic climatecontrolonly. Operat
ingthe climate controlsystem
133Climate control Z