2012 MERCEDES-BENZ M-Class engine

G
WARNING If
the 45 indicatorlamp illumina tes
when anadu ltor someone largerthan asmal l
indivi dualis in the front passenger seat,have
the front passenger repositionhimse lfor
hersel fint he seat until the45
indicator lampgoesout.
In the event ofacollision, theairbag cont rol
unit willnotallow frontpassenger frontairbag
deploy mentwhen theOCS hasclassified the
front passenger seatoccupant asweighing as
much asorless than atypical 12-month-old
child inastandard childrestraint orifthe front
passenger seatisclassified asbeing empty.
When theOCS senses thatthefront
passenger seatoccupant isclassified as
being uptoor less than theweight ofatypical
12-m onth-oldchild inastandard child
restraint ,the 45 indicatorlampwill
illu minate whentheengine isstarted and
remain illuminated. Thisindicates thatthe
front passenger frontairbag isdeactivated.
When theOCS senses thatthefront
passenger seatisclassified asbeing empty,
the 45 indicatorlampwillilluminate
when theengine isstarted andremain
illu minated. Thisindicates thatthefront
passenger frontairbag isdeactivated.
When theOCS senses thatthefront
passenger seatoccupant isclassified as
being heavier thantheweight ofatypical 12-
mont h-old childseated inas tand ardchi ld
res traint oras being asma llind ividu al(such
as ayo ung teenag eror as mall adult),the
45 indicatorlamp willill umina tefor
app roximatel y6s econ dswhen theengine is
start ed.Depen dingonoccupant weight
sensor readings fromtheseat, itwill then
remain illuminated orgo out. With the
45 indicatorlamp illuminated, the
fron tpassen gerfron ta irbag isdeact ivated.
With the45 indicatorlamp out,the
fro ntpassen gerfrontair bag isact ivate d.
When theOCS senses that thefront
passen gerseat occupant isclassif iedasan
adult orsomeo nelarger thanasmall indiv
idual, the45 indicatorlamp will
illuminat efor approx imatelysix seco nds
when theengin eis star ted and thengoout.
This indicates thatthefront passenger front
air bag isactivated.
If the 45 indicatorlampisilluminated,
the front passenger frontairbag is
deactivated andwillnotbedeployed.
If the 45 indicatorlampisnot
illuminated, thefront passenger frontairbag
is activated andwillbedeployed
R in the event ofcert ainfront alimpacts
R ifthe impact exceeds apredetermin ed
triggering threshold
R independent ofthe side impact airbag or
pelvis airbag
If the front passenger frontairbag is
deployed, therate ofinflation willbe
influenced by
R the rate ofvehicle deceleration asassessed
by the airbag cont rolunit
R the front passenger's weightcategory as
identified bythe OCS
For further informat ion,see"Air bag display
messages" (Ypage 249). G
WARNING Acc
ording toaccident statistics,children are
safer when properly restrained onthe rear
seats thanonthe front -passenger seat.Thus,
we stron glyrecommen dthat children be
placed inthe rear seats whenever possible.
Regardless ofseating position, children12
years oldand under mustbeseated and
properly securedinan appropriate infant
restraint ,toddler restraint ,or booster seat
recommen dedforthe size andweight ofthe
child.
The infant orchild restraint mustbeproperly
secured withthevehicle's seatbelt, theseat
belt andTopTether strap,orlower anchors
and TopTether strap,fullyinaccordanc ewith
the child seatmanufacturer' sinstr uctions. Occupant
safety
45Safety
Z

X
To rais e:slid ethe beltsa sh guideup wa rds .
The beltsa sh guide eng ages invario us
po sitio ns.
X To lowe r:pre ssand holdbe ltsa sh guide
rel ease :.
X Sli de the beltsa sh guide do wnw ards.
X Re leas ebe ltsa sh guide rel ease : and
ma kesure tha tthe belt sash guide has
engaged.
Releasing seatbelts X
Press release button?(Ypage51)and
guide belttongue ;back towards belt
sash guide :.
! Make surethattheseat beltisfully rolled
up. Otherwise, theseat beltorbelt tongue
will betrapped inthe door orinthe seat
mechanism. Thiscould damage thedoor,
the door trimpanel andtheseat belt.
Damaged seatbelts cannolonger fulfill
their protect ivefunct ionand must be
replaced. Consultanauthorized Mercedes-
Benz Center.
Belt warning forthe driver andfront
passenger Regardl
essofwhether thedriver andfront
passenger havefastened theirseatbelts
already ,the 7 seatbeltwarning lamp
lights upfor 6secon dsafter every engine
start .It then goes outifthe driver andthe
fron tpasse nger have fastened their seat
belt s.
If th edriv er'sseat beltisno tfast ened after
th een gin eis start ed, anaddit ionalwarn ing
to ne will soun d.The warn ingtone goes out
aft erappro ximatelysix sec onds oronce the
driv er'sseat beltisfast ened. If
th edriv eror fron tpasse nger have not
fast ened their seat beltafter6s econ dsand
the doors areclosed, the7 seatbelt
warning lamplights up.
R until thedriver orthe fron tpasse nger have
fast ened their seat belts
R ifaveh icle spee dof 15 mph (25km/h)is
ex cee ded once, awarn ingtone with
inc reas ingintensitysoun dsaddit ionally for
a max imum of60 sec onds orunt ilth edriv er
or fron tp asse nger have fastened their seat
belt s.
If th edriv eror fron tpasse ngerundo their seat
belt sdurin gth ejo urn ey, the7 seatbelt
warn inglamp lightsup and thewarn ingtone
soun dsagain .
The warn ingtone ceas eseve nifthe driver or
front passenger havestillnotfastened their
seat beltafter 60seconds. The7 seatbelt
warning lampstops flashing butcont inues to
be lit.
Once thevehicle isstationary, thewarning
tone isreactivated andthe7 seatbelt
warning lampstarts toflash again ifthe
vehicle speedexceeds 15mph(25 km/h)
once.
The 7 seatbeltwarning lamponlygoes
out if:
R both thedriver andthefront passenger
have fastened theirseatbelts.
or
R the vehicle isstationary andadoor isopen. i
For
more information onthe 7 seat
belt warning lamp,see"Warning and
indicator lampsinthe instrumen tcluster,
seat belt" (Ypage 269).
Emergency TensioningDevices,belt
force limiters The
front seatbelts andtheouter seatbelts
in the rear areequipp edwith ETDs andseat
belt force limiters.
The ETDs onthe driver's andfront -passenger
seat consist ofpyrotechnic beltbuckle Occ
upantsafety
53Safety Z

R
PRE-S AFE®
Brake
R Steering assistant STEERCONTROL Impor
tantsafety notes
If you failtoadapt yourdriving style,the
driving safetysystems canneither reducethe
risk ofaccident noroverride thelaws of
physics. Drivingsafety systems aremerely
aids designed toassist driving. Youare
responsible forthe distanc eto the vehicle in
fron t,for vehicle speedandforbraking in
good time. Always adaptyourdriving styleto
suit theprevailing road/weather conditions,
as well asthe traff iccondit ionsandmaintain
a safe distanc eto the vehicle infron t.Drive
carefully. i
Please
notethat thedriving safety
systems described onlywork aseffect ively
as possible whenthereisadequa tecont act
between thetires andtheroad surface. Pay
particular attentiontothe inform ation
regarding tires,recomm endedminimum
tire tread depths etc.inthe "Wheels and
tires" section(Ypage 350).
In wintry driving conditions,alway suse
winter tires(M+S tires)andifnecess ary,
snow chains. Onlyinthis way willthe
driving safetysystems described inthis
sect ionwork aseffect ivelyaspossible. ABS
(Anti-lock Braking System )
Impor tantsafety notes i
Observe
the"Importan tsafet yno tes"
sec tion(Ypage 61).
AB Sr egulates brakepressure insuch away
that thewheels donot lock when youbrake.
This allows youtocon tinue steer ingthe
vehicle whenbrakin g.
AB Sw orks from aspeed ofabout
5m ph(8 km/ h)upwards, regardless ofroad-
surface condition s.AB Sw orks onslippery
surfaces, evenwhen youonly brake gently. G
WARNIN
G If
the ABS malfunct ions,other driving systems
such asthe BAS orthe ESP ®
are also switched
off. Observe indicator andwarning lampsthat
may come onaswell asmessages inthe
multifunct iondisplay thatmay appear.
If the ABS malfunct ions,thewheels maylock
during hardbraking, reducing thesteering
capability andexten dingthebraking distance.
The ! warning lampinthe instr ument
cluster lightsupwhen theignition isswitched
on. Itgoes outwhen theengine isrunnin g.
Br aking If
ABS intervenes whenbraking, youwillfeel
a pulsing inthe brake pedal.
X IfABS intervenes: continue todepress the
brake pedalwithforce untilthebraking
situation isover.
X To mak eafull brake application:
depress thebrake pedalwithfullforce.
The pulsating brakepedalcanbean
indication ofhazardous roadcondit ions,and
funct ionsasareminder totake extracare
while driving. G
WARNIN
G Do
not pump thebrake pedal. Usefirm, steady
brake pedalpressure instead.Pumping the
brake pedaldefeats thepurpose ofthe ABS
and significant lyreduces braking
effect iveness. BAS
(BrakeAssist System) i
Observe
the"Important safetynotes"
section (Ypage 61).
BAS operates inemergenc ybraking
situations. Ifyou depress thebrake pedal
quickly, BASautomatically booststhebraking
force, thusshorten ingthe stopping distance.
X Keep thebrake pedalfirmly depressed until
the emergenc ybraking situation isover.
ABS prevent sthe wheels fromlockin g. Driving
safetysystems
61Safety Z

R
to cros sing traffic
R in cur ves
As ares ult, BAS PLUScann otinte rvenein
cri tica lsi tua tions. The reisaris ko fan
acc iden t.Always paycareful attent ion tothe
tr aff icsit uatio nand berea dytobra ke.
Fol lowi ng dama getothe front endofthe
veh icle, ha ve the confi guratio na nd opera tion
of the rada rs ensor schec kedataqualified
specialist workshop.This also applies to
collisions atlow speeds wherethereis no
visible damage tothe fron tofthe vehicle.
If BAS PLUS isnot availa bledue toa
malfunction inthe radar sensor system, the
brake system remains availablewith full
brake boosting effectandBAS. ESP
®
(Ele ctronic Stability Program)
Import antsafety notes i
See
the"Important safetynotes" section
(Y page 61).
If ESP ®
detect sthat thevehicle isdeviating
from thedirection desiredbythe driver, one
or more wheels arebraked tostabilize the
vehicle. Ifnecessary, theengine outputisalso
modified tokeep thevehicle onthe desired
course withinphysical limits.ESP®
assists
the driver whenpullingaway onwet or
slippery roads.ESP®
can also stabilize the
vehicle duringbraking.
If ESP ®
interven es,the ÷ ESP®
warning
lamp flashes inthe instrumen tcluster . G
WARN
ING Und
erno circums tances should you
deact ivateES P®
when the÷ ESP®
warnin glamp inthe instrumen tclust er
flashe s.Proc eedasfollows :
R when drivingoff ,apply aslittlethr ottleas
possible .
R while driving,ease upon the accelerat or
pedal.
R adapt yourspeed tosuit theprev ailing road
and weathe rconditions .
Failure toobserve theseguidelines could
cause thevehicle toskid. ESP®
cann ot
prevent accident sresulting fromexcessive
speed.
! Only operate thevehicle foramaximum
of ten seconds onabrake test
dynamometer. Switchoffthe ignition.
Application ofthe brakes byESP ®
may
otherwise destroythebrake system.
! Funct ionorperformanc etest smay only
be performed ona2-axle dynamometer. If
you wish tooperate thevehicle onsuch a
dynamometer, pleaseconsult an
authorized Mercedes-B enzCenter
beforehand. Youcould otherwise damage
the drive trainorthe brake system. i
Only
usewheels withtherecommen ded
tire sizes. OnlythenwillESP ®
funct ion
properly.
4ETS (Electronic Traction System) i
Observe
the"Important safetynotes"
section (Ypage 61).
Traction controlispart ofESP ®
.
Traction controlbrakes thedrive wheels
individuall yif they spin. Thisenables youto
pull away andaccelerate onslippery surfaces,
for example ifthe road surface isslippery on
one side. Inaddition, moredrivetorque is
trans ferred tothe wheel orwheels with
tract ion. Driving
safetysystems
63Safety Z

In
this situa tion, ESP®
assi stsyou and can
detect ifthe vehicle /trailer combination
begi nstolurch. ESP®
slow sthe vehicle down
by braking andlimiting theengine outputuntil
the vehicle/tra iler comb inationh as
st abiliz ed.
Trail erstabiliz ationisactive fromaspeed of
approximately 37mph(60 km/h). G
WARNING The
system willnotbeable toassist whenthe
trailer jackknifes
R ifthe ESP ®
has switched offdue toa
malfunction
R on wet oricy roads
R on roads withslippery surface
R in sand orgravel
Trailers withahigh centerofgravity maytip
over before thesystem recognizes swayingof
the trailer.
Traile rstab iliza tiond oes notwork ifESP ®
is
deactivated ordisabled becauseofa
malfunct ion. EBD
(elec tronic brake force
distr ibution) i
Observe
the"Important safetynotes"
section (Ypage 61).
EBD monit orsand cont rolsthebrake
pressure onthe rear wheels toimprove
driving stability whilebraking. G
WARNIN
G If
EBD hasmalfunct ioned,thebraking system
remains availablewith fullbrake boosting
effect .However, therear wheels canstilllock,
e.g. under fullbraking. Thiscould cause you
to lose controlofyour vehicle andcause an
accident .You should therefor eadapt your
driving styletothe different handling
character istics. X
Observe thenoteson warning andindicator
lamps (Ypage 272)aswell asdisplay
messages (Ypage 241). ADA
PTIVE BRAKE
AD APTIVE BRAKEenhancesbraking safety
and offers increased brakingcomfort.In
addition tothe braking function,ADAPTIVE
BRAKE alsohastheHOLD function
(Y page 179)andhillstart assist
(Y page 142). Forfurther informat ion,see
Drivin gtips (Ypage 159). PRE-SAFE
®
Br ake
PRE-S AFE®
Brake isonly availa bleinvehicles
with DISTRONIC PLUS. i
Observe
the"Important safetynotes"
section (Ypage 61).
PRE-S AFE®
Brake canhelp youtominimize
the risk ofafront alcollision withavehicle
ahead orreduce theeffect sofsuch a
co llisio n.IfPRE -SAF E®
Br ake hasdetecteda
ris ko fcollision, youwillbewarned visually
and acoustically aswell asby automatic
braking. PRE-SAFE®
Brake cannotprevent a
collision withoutyourintervention.
At speeds aboveapproximately
20 mph (30km/ h),this funct ionwarns you
when youarerapidly approaching thevehicle
in front .An interm ittentwarning tonewill
then sound andthe· distance warning
lamp inthe instr ument cluster willlight up.
X Brake immediately inorder toincrease the
distance fromthevehicle infront .
or
X Take evasive actionprovided itis safe todo
so. Driving
safetysystems
65Safety Z

Useful
information
i This
Operat or'sManual describesall
models andallstan dard andoption al
equipment ofyour vehicle available atthe
time ofpublication ofthe Operat or's
Manual. Country-specificdiffer encesare
possible. Pleasenotethat your vehicle may
not beequipped withallfeature s
descr ibed. Thisalso applies tosafet y-
related systemsand func tions. i
Please
readtheinfor mation onqualified
specialist workshops(Ypage 25). Sma
rtKey Impor
tant safet ynotes G
WARN
ING When
leaving thevehicle, alwaysremovethe
Smart Keyfrom theignit ionlock .Always take
the Smart Keywith youand lock thevehicle.
Do not leave children unsuperv isedinthe
vehicle, evenifthey aresecured inachild
rest raint system ,and donot give them acces s
to an unlock edvehicle. 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 If
akey ring istoo heavy ortoo large, the
weight actingonthe key could cause itto turn
in the ignition lockorcatch onthe steering
wheel. Thiscould cause theengine tobe
switched offsuddenly. Youcould losecontrol
of the vehicle andcause anaccident. Donot
attach anyheavy orlarge keyrings tothe key
that isinserted inthe ignition. General
notes
If you cannot lockorunlock thevehicle with
the SmartK ey,either thebattery inthe
SmartK eyisdischarged, theSmartK eyis
faulty orthe starter battery isdischarged.
X Check thebattery inthe SmartK eyand
replace itifnecessary (Ypage 76).
X Unlock thedriver's doorusing the
mechanical key(Ypage 80).
X Lock thevehicle usingthemechanical key
(Y page 80).
X Have thestarter battery andthebattery
cont acts check edataqual ified specialist
workshop.
If the SmartK eyisfaulty, contactRoadsi de
Assistanc eor aqual ified specialist workshop. Smar
tKeyfunctions
General notes i
USA
only:
This device complies withPart15ofthe
FCC Rules. Operation issubject tothe
following twocondition s:
1. This device maynotcause harmful
interfer ence,and
2. this device mustaccept anyinterfer ence
received, includinginterferencethatmay
cause undesired operation. 72
Smar
tKeyOpening/closing

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

Opening/closing
fromoutsid e
Opening X
Press the% button onthe Smart Key. X
Pull handle :.
X Raise thetailgate.
Vehicles withtheEASY-PACK tailgate:if
you pull handle :and then release it,the
tailgate opensautomatic ally.
Closing G
WARN
ING To
preven tpossible personal injury,always
keep hands andfingers awayfromthecargo
compartm entopening whenclosing the
tailgate. Beespecially carefulwhensmall
children arearound. X
Pull thetailgate downusingrecess :.
X Push thetailgate closedfromoutside the
vehicle.
X Ifnecessary, lockthevehicle with
the & button onthe Smart Key (Y
page 72)orwith KEYLE SS-GO
(Y page 73). i
If
aKEYLE SS-GO key isdetect edinthe
cargo compartm ent,thetailgate willnot
lock. Opening/cl
osingautomat ically from
outside
Import antsafety notes G
WARNING Make
surethetailgate isclosed whenthe
engine isrunnin gand while driving. Among
other dangers, deadlycarbon monoxide(CO)
gases mayenter vehicle interior resulting in
uncons ciousness anddeath.
! The tailgate swingsupwards andtothe
rear when opened. Therefore, makesure
that there issufficient clearance aboveand
behind thetailgate.
To open thetailgate completely, aminimum
clearance of7.20 ft(2.20 m)above the
gro und isneces sary.
Ope ning Yo
ucan openthe tailgate automatically using
the SmartK eyorthe handle inthe tailgate.
X Press andhold theF button onthe
SmartK eyuntil thetailgate opens.
or
X When thetailgate isunlocked, pullthe
handle andletitgo again immediately.
Closi ng G
WARNING Monitor
theclosing procedure carefullyto
make surenoone isin danger ofbeing
injured. Toprevent possible personal injury,
alwa yskeep hands andfingers awayfromthe
cargo compartmen topenin gwhen closing the
tailgate. Beespecially carefulwhensmall 82
Cargo
compar tmentOpening/closing