engine MERCEDES-BENZ M-Class 2012 W166 Workshop Manual

When
the Remainin
gStarts: 16 message
is shown inthe multifunc tiondisplay, youcan
start theengine 16more times. IfDE Fis not
added, itwill notbepossible torestar tthe
engine. Fillthe DEF tank withapprox. 1gal
(3.8 l)DEF ,or have itfilled ataqual ified
specialist workshop. i
If
you drive thevehicle fasterthan10mph
(16 km/h), the Check
Additive See Operator's
Manual message
goesoff
after approximately oneminute.
Further information aboutBlueTEC exhaust
gas aftertr eatment andDEF isavaila bleatany
authorized Mercedes-Ben zCent er.
Adding DEF G
WARN
ING Make
sure
R DE Fdoes notcome intocontact with skin,
eyes, orcloth ing
R to keep DEFout ofthe reach ofchildren
If you and/or othershave come intocontact
with DEF:
R IfDE Fhas gotteninto contact with eyes,
flush withplenty ofwater immediately and
seek medical help.
R Clean affectedskin immediately withplenty
of water.
R IfDE Fw asswallowe d,rin se mout h
imm ediat elywith plentyof wate rand drink
pl enty ofwa ter. Consu ltaphy sicia n. G
WAR
NING If
yo uop en the DEF tank cap,sma llamo unts
of amm oniavap orma ybe released .This
depends inparticular upontheage ofthe DEF .
Ammon iavapors haveapungent odorandare
particularly irritatingto:
R skin
R mucous membranes
R eyes You
may experience aburning sensation in
your eyes, noseandthroat, aswell as
coughing andwatering ofthe eyes.
Do not inhale anyammonia vaporsthatmay
be released. Fillthe DEF tank onlyinwell-
ventilated areas.
! Only useDEF inaccordance with
ISO 22241 .Do not mix anyadditives with
DEF ,and donot dilute DEFwith water. This
may destroy theBlueTEC exhaustgas
aftertr eatment system.
! The vehicle mustbeparked onlevel
ground tofill the DEF tank.The DEF tank
can only befilled asinten dedwith the
vehicle parkedonalevel surface. This
avoids falselevelreadings. Fillingthetank
is not permitted ifthe vehicle isnot parked
on alevel surface. Thereisadanger of
overfilling, whichcouldresult indamage to
componen tsof the BlueTEC exhaustgas
aftertr eatment .
If the outside temperature islower than
Ò11 †,damage mayoccur whenadding DEF.
If DEF isfrozen andthere isan active warning
indicator, addingmaynotbepossible. Park
the vehicle inawarmer place,e.g.inagarage,
until DEFhasbecome fluidagain. Fillingis
then possible again.Alternatively, havethe
DEF tank refilled ataqual ified specialist
workshop.
! Rinse surfaces thathave come into
cont actwith DEFimmediately withwater or
remove DEFusing adamp clothandcold
water. Ifthe DEF hasalread ycrystallized,
use asponge andcold water toclean it.DEF
residues crystallize aftertimeand
cont aminate theaffected surfaces.
! DEF isnot afuel additive andmust notbe
added tothe fuel tank .If DEF isadded to
the fuel tank ,this canlead toengine
damage.
Further information onDEF (Ypage 387). Refueling
153Driving and parking Z

Closing
theDEF filler capand fuel filler
fla p X
Plac eDE Ffiller cap;onthe filler neckand
tur nit clo ckwi se.
X To closethe fuel fillerf lap, press itin the
direc tionofarrow :.
X Dr ive ataspeed above10mph (16km/h) .
The Chec
kAddi tive SeeOperator's Manu
al mess
agedisappears after
approx imatelyone minute. i
If
the Chec
kAddi tive See Oper
ator'sManu al mess
agecontinues
to be shown inthe mult ifunc tiondisplay,
you need toadd moreDE F. Par
king Imp
ortant safety notes G
WARN
ING Do
not park thisvehic lein areas where
com bustib lemat erials cancom eint ocon tact
with thehot exhaust system. Donot park the
vehic leon dry grass landorharve stedgrain
fields. Combust iblematerials, suchasgrass ,
hay orleaves couldbeignit edbythe hot
exh aust systemand cause avehic lefire . Unin
tended vehic lemov emen tcan cause
serio usperso nalinjury ordamage tothe
vehic leor the vehic ledrive train. Toreduc e
such risks,always dothe followin gbefor e
tur nin goff the engineand leavin gthe vehic le:
R keep yourright footonthe brak epedal.
R apply theelect ricpark ingbrak e.
R shift theautom atictransm ission intopark
posit ionP.
R slowly release thebrak epedal.
R when parkedon anincline, always turnthe
front wheels towards theroad curb.
R turn theSmartKey inthe ignition lockto
position 0and remove theSmartKey from
the ignition lock,orpress theKEYLES S-GO
Start /Stopbutton.
R take theSmartKey withyouand lock the
vehicle whenleaving. Switching
offthe engine
Import antsafety notes G
WARNING Never
switch offthe engine whilethevehicle
is in motion.
There isno brake boostforthe service brake
if the engine isnot running. Ifthe ignition is
switched off,there isalso nopower
assistance forthe steering.
You willrequire considerably moreeffort to
steer andbrake andyoucould therefore lose
cont rolofthe vehicle andcause anaccident. G
WARNING Keep
inmind thatturning offthe engine alone
only willshift theautomatic transmission into
neutral position Nautomatically .
Always shifttheautomatic transmission into
park position Pbefore turning offthe engine.
Otherwise thevehicle couldrollaway which
could result inan accident and/orserious
personal injury. Park
ing
155Driving and parking Z

X
App lythe electri cpark ing brak e.
X Sh ift thetrans mis sion toposi tionP.
Using theSm artKey X
Turn theSm artKey toposi tion0 inthe
ign ition lockand remove it.
The imm obiliz erisact ivat ed. i
If
you turnoff theen gin ewit hth e
Sm artKey and then rem ove itfrom the
ign ition lockor open afron tdoor ,th e
auto matictrans mis sion shiftsto P
auto maticall y.
Using KEYLESS- GO X
Pre sstheSt art /S topbut ton( Ypage 139).
The engin estops andallthe indicat or
lamps inthe instrument clustergoout. i
If
you usetheStart/ Stop butt ontoswitc h
off the engin e,the automatic transmission
shift sto Nautomatic ally.Ifyou then open
one ofthe fron tdoors, theautomatic
trans mission shiftstoP. i
In
an emergenc y,the engine canbe
turned offwhile thevehicle isin motion by
pressing andholding theStart /Stopbutton
for three seconds. Elec
tric par king brake
General information i
The
electric parking brakeperforms a
funct iontest atregular intervalswhile the
engine isswitched off.The sounds thatcan
be heard whilethisisoccurrin gare normal. G
WARNIN
G When
leaving thevehicle, alwaysremove the
Smart Keyfrom thestart erswitch, takeitwith
you, andlock thevehicle. Donot leave
children unattendedinthe vehicle, orwith
access toan unlocked vehicle.Children could
release theparking brakeand/or shiftthe
automatic transmission outofpark position P,
either ofwhich couldresult inan accident
and/or serious personal injury. Applying/releasing
manually X
To app ly:press handle :.
The redF (USAonly)or! (Canada
only) indicator lampinthe instr ument
cluster lightsup. i
The
electric parking brakecanalso be
applied whentheSmart Keyisremoved.
X To release: pullhandle :.
The redF (USAonly)or! (Canada
only) indicator lampinthe instr ument
cluster goesout. i
The
electric parking brakecannotbe
released unlesstheSmart Keyisin position
1 in the ignition lockorthe ignition has
been switched onusing theStart /Stop
button .
To ensure thatyoudon't rollbackwards when
pulling awayonanuphill slope, engage the
electric parking brake(Ypage 141).
Applying automat ically Your
vehicle's electricparking brakeis
automatically appliedifDIS TRONIC PLUSor
the HOLD functionbring thevehicle toa
standst ill,orare engaged tokeep thevehicle
station ary.Inaddition, atleast oneofthe
following conditionsmust befulfilled: 156
Par
kingDriving and parking

R
the engineissw itch edoff.
R the driver 'sdo or isop en and theseat belt
is not faste ned .
R the vehicleis sta tionar yfor alength y
pe riod .
Th ered F (USA only)or ! (Cana da
onl y)ind icator lamp inthe instrument cluste r
li gh ts up .
Rel easing auto matic ally Yo
ur veh icle'sel ectr icpa rki ng bra keis
au toma tically rel easedifallof the followi ng
cond itions aremet:
R the engineisrunning .
R the transmi ssion isin po sitio nD or R.
R the seat beltha sbe en faste ned .
R yo ude pre ssthe accelera tor pedal.
If the transmi ssion isin po sitio nR, the trunk
li d mu stbe closed.
If yo ur seat beltis not faste ned ,the followi ng
cond itions mustbe fulfille d to automa tically
rel ease the electr icpa rki ng bra ke:
R the driver 'sdo or isclo sed.
R yo uha ve shifted outo ftransmis sion
posi tion Por you have previouslydrive n
faster than2mph (3km/h) .
Emerge ncybraking The
vehicl ecan alsobe braked duringan
emerge ncyusing the electric parking brake.
X Whil edrivi ng,pus hhandl e: ofthe electric
parking brake(Ypag e156). i
The
vehicl eis braked aslong asyou keep
the handl eof the electric parking brake
presse d.The longer theelectric parking
brake handleis depre ssed, thegrea terthe
braking force. During
braking:
R awa rning tonesound s.
R the Release
parkingbrake messa
ge
app ears.
R the red F (USAonly)or ! (Canada
only )indica torlamp inthe instrument
cluster flashes.
When thevehicl ehas been braked toa
standstil l,the electric parking brakeis
engag ed. Parking
thevehi cleforalong period
If you leave theveh icle park edfor longer than
four week s,thebatt erymay bedamage dby
exh aust ivedisc harg e.
X Conn ectatrick lechar ger. i
You
canobtain inform ationabout trick le
char gers from aqualifie dspec ialist
work shop,e.g .ana uth orizedMer cedes-
Ben zCen ter.
If you leave theveh iclep ark edfor longer than
six week s,theveh icle may sufferdamag eas
a res ult oflack ofuse.
X Visi taqu alified specialist workshopand
seek advice. Driving
tips General
driving tips
Impor tantsafet ynotes G
WARN
ING Always
remembe rthat you must concentrat e
primarily ondriving thevehicle. Thedriver's
conc entrat ionmust alwaysbe directed
primarily atroad traffic. Foryour ownsafety
and that ofothers, werecommen dthat you
stop thevehicle atasafe place andin
accordance withthetraffic conditions before
making oraccepting aphone call.
Comply withalllegal requirements ifyou use
the telephone whiledriving. Usethehands-
free system andonly usethetelephone when Driving
tips
157Driving and parking
Z

road
,wea ther andtraffic conditions permit.In
some jurisdictions, itis forbid denfordrivers
to use mobil ephones whiledrivi ng.
Only opera teCOMAND (Cockpit Manag ement
and Data System) incompli ancewithalllega l
requ irements andwhen theroad ,wea ther and
traffic conditions permit.Youmay otherwi se
not beableto observe thetraffic conditions,
endange ringyourself andothers.
Reme mberthatyourvehicle coversa distanc e
of 44 feet (approximately 14m)asecon d
when itis travelin gat only 30mph
(approximately 50km/ h).
Drive sensibly –save fuel Obse
rvethe followi ngtips tosave fuel:
X The tires shouldalwa ysbe infla tedtothe
recomme ndedtirepres sure.
X Re move unneces saryloads.
X Re move roofcarrierswhe nthey arenot
needed.
X Warm upthe engine atlow engine speeds.
X Avoid frequent acceleration orbraking.
X Have allmaintenanc ework carried outas
indicated bythe service intervals inthe
Service Booklet orby the service interval
displa y.
Fuel consumption alsoincreases when
driving incold weather, instop-and- gotraffic
and inmountainous terrain.
Drinking anddriving G
WARNING Drink
ingand driving and/or takingdrugsand
driving arevery dangerous combinations.
Even asmall amount ofalcohol ordrugs can
affect yourreflexes, perceptions and
judgment.
The possibili tyof aserious oreven fatal
accident aregreatly increased whenyoudrink
or take drugs anddrive. Do
not drink ortake drugs anddrive orallow
anyone todrive whohasbeen drinking or
taking drugs.
Pedals G
WARNING Make
sureabsolu telynoobject sare
obstructin gthe pedals' rangeofmovement .
Keep thedriver's footwell clearofall
obstacles. Ifthere areany floormats or
carpets inthe footwell, makesurethatthe
pedals stillhave sufficient clearance.
During sudden drivingorbraking maneuvers,
the object scould getcaught between the
pedals. Youcould thennolonger brakeor
accelerate. Thiscould leadtoaccidents and
injury.
Rolling withtheengine switched off G
WARNING There
isno power assistance forthe steering
and thebrake whentheengine isnot running.
Steerin gand braking requires significantly
more effort andyoucould losecontrolofthe
vehicle andcause anaccident asaresult.
Do not turn offthe engine whilethevehicle is
in motion.
Exhaust check G
WARNING Inhalation
ofexhaust gasishazardous toyour
health. Allexhaust gascont ains carbon
monoxide (CO),andinhaling itcan cause
unconsc iousness andpossible death.
Do not run theengine inconfin edareas (such
as agarage) whicharenot properly ventilated.
If you think thatexhaust gasfumes are
enterin gthe vehicle whiledriving, havethe
cause determined andcorrect ed
immediately. Ifyou must driveunder these
condition s,drive onlywith atleast one
window fullyopen atall times. 158
Driving
tipsDriving and parking

Cert
ainengin esyst ems aredesi gned tokeep
th eleve lof pois onous compo nentsin ex haust
fum eswit hin legal limits.
Thes esyst ems onlywork atpeak efficie ncy
when they are main tainedex act lyin
acc ordanc ewit hth eman ufacturer's
spec ifications.Fo rthis reason, allwork onthe
engine mustbecarried outonly byqual ified
and authorized Mercedes-Ben ztechn icians.
The engin esett ings must notbechanged in
any circumstan ces.Furthermor e,all specific
servic ework must becarried outatregular
int ervals andinaccor dance withthe
Mercedes- Benzservic erequirement s.Det ails
can befound inthe Serv iceBook let. Engine
oil
! Vehicles withadiesel particle filter:
If the vehic leismost lydriven forshort
distan ces,itis possible thatmalfun ctions
may occurduring theautomat icclean ingof
the diesel particle filter. This canlead to
engin edamage. Therefore,ifyou frequen tly
drive short distan ces,make suretodrive
on highways orinter- urban roadsfor20
minut esatleast every 310miles (500km). Br
akes
Imp ortant safet ynotes G
WARN
ING On
slippery roadsurfac es,nev erdowns hiftin
order toobtain brakingact ion. This could
result indrive wheel slipand reduce dvehic le
con trol. Your vehic le'sABSwill notpreve nt
this type ofloss ofcon trol. G
WARN
ING Make
surethatyoudonot endan gerother
road users whenyouapply thebrake s. Downhill
gradient s !
Onlong andsteep gradien ts,you must
reduce theload onthe brake sby shift ing
early toalower gear.Thisallows youtotak e
advant ageofthe engin ebrakin geffe ctand
helps avoidoverheatin gand excessive
wear ofthe brake s.
When youtakeadvant ageofthe engin e
brakin geffe ct,a drive wheel maynotturn
for some time,e.g. onaslippery road
surfac e.This could cause damage tothe
drive train. This type ofdamage isnot
cov ered bythe Merc edes- Benzwarrant y.
Hea vyand lightload s G
WAR
NING De
pre ssin gth ebrak epedal constant lyres ults
in ex ces siveand premat urewear tothebrak e
pads.
It may alsocauseth ebrak estoove rheat,
ser iously impairingth eir effect iven ess.Itm ay
th en notb epossible tostop thevehicle in
sufficien ttime toavoid anacciden t.
If the brakes havebeen subject edtoaheavy
load, donot stop thevehicle immediately, but
drive onfor ashort while. Thisallows the
airflow tocool thebrakes morequickly.
Wet roads G
WARN
ING Aft
erdriving inheavy rainforsome time
without applying thebrakes orthro ugh water
deep enough towet brake compon ents,the
first braking actionmaybesomewhat
reduced. Youhave todepress thebrake pedal
more firmly. Maintain asafe distanc efrom
vehicles infron t.
Aft erdriving onawet road orhaving the
vehicle washed, brakefirmlywhilepaying
atten tiontothe traff iccon ditions .This will
warm upthe brake discs, thereby dryingthem
more quickly andprotec tingthem against
corr osion. Driving
tips
159Driving and parking Z

Limi
tedbraking performa nce onsalt -
tr eat edroa ds G
WAR
NING The
layer ofsalt ontheb rake discs andthe
brake pads/linings maycauseadelay inthe
brakin geffec t,resultin gin asignific antly
longer brakingdistanc e,which couldleadto
an acciden t.
To avoid thisdanger, youshould:
R occ asionally brakecarefully, without
puttin gother roadusers atrisk, when you
are driving onsalted roads. Thishelps to
remov eany salt that may have startedto
build upon the brake discsandthebrake
pads/linin gs.
R maint ainagreater distancetothe vehicle
ahead anddrive withparticular care.
R carefully applythebrakes atthe end ofa
trip and immediately aftercommen cinga
new trip,sothat saltresidues areremoved
from thebrake discs.
Servicing thebrakes !
Ifthe red brake warning lamplights upin
the instr ument cluster andyouhear a
warning tonewhile theengine isrunnin g,
the brake fluidlevel maybetoo low.
Observe additional warningmessages in
the multifunct iondisplay .
The brake fluidlevel maybetoo low due to
brake padwear orleaking brakelines.
Have thebrake system checked
immediately. Thiswork should becarried
out atan authorized Mercedes-B enz
Center.
All check sand mainten ancework onthe
brake system mustbecarried outata
quali fiedspecialist workshop only.Have this
work carried outatan authorized Mercedes-
Benz Center.
Have thebrake padsreplaced andthebrake
fluid renewed ataquali fiedspecialist
workshop, e.g.anauthorized Mercedes-B enz
Center. G
WARNING If
brake padsorbrake fluidother thanthose
recommen dedareused, thebraking
properties ofthe vehicle canbedegraded to
an exten tthat safe braking issubstantially
impaired. Thiscould result inan accident.
! Afunct ionorperformance testshould
only becarried outona2 -axl e
dy nam ome ter.Ifyo uar eplanni ngtohave
the vehicleteste don such ady nam ome ter,
conta ctan author izedMer cedes-B enz
Ce nter toobtainfu rthe rinfo rma tionfir st.
Othe rwise, youcou ldda ma gethe drive
trai nor the brakesystem .
! Asthe ESP ®
sy stem opera tes
au toma tically, the engineand theigniti on
mu stbe switch edoff (Sma rtKeyin po sitio n
0 or 1in the igniti onlock orStar t/Stop
bu tton inpo sitio n0 or 1) wh ile the electri c
pa rking brakeisbe ing teste don abra ke
dy nam ome ter(ma ximu m10secon ds).
Brak ingtrigger edautomatic allybyESP®
may seriously damagethebrake system.
If your brake system issubject onlyto
moderate loads,youshould testthe
func tionality ofyour brakes atregular
int ervals bypressing firmlyonthe brake pedal
at high speeds. Thisimproves thegrip ofthe
brake pads. G
WARN
ING Make
surethatyoudonot endanger other
road users whenyouapply thebrakes.
You canfind adescript ionofBrak eAssist
(BAS )on (Ypage 61)orofBA SPLUS on
(Y page 62). 160
Driving
tipsDriving and parking

Dri
vin gon wet road s
Hy dropl aning If
wat erhas accumula tedto ace rtain dept h
on thero ad sur face,there isadan ger of
hydr oplaning occur ring,eve nif:
R you drive atlow spee ds.
R the tires have adequa tetread depth.
For this reas on,inthe event ofhea vyrainor
in conditio nsinwhi chhyd ropl aning canoccur
you must driveinthe followi ngmanner:
R low eryou rspeed
R avoid ruts
R brake carefully
Driving onflooded roads !
Donot drive through flooded areas.
Check thedepth ofany water before driving
thr ough it.Driv eslowly through standing
water. Otherwise, water mayenterthe
vehicle interior orthe engin ecompart ment.
This candamage theelect ronic
compon entsin the engin eorthe automatic
transmission. Watercanalso bedrawn in
by the engine's airsuction nozzlesand this
can cause engine damage. i
Vehicles
withtheAIRMATIC package:
Set theraised levelbefore driving through
standing water.
Off-r oadfording Fording
depth Steel-spring
vehicles 20
in.
(50 cm) Vehicles
withtheAIRMATIC
package Raise
dlevel 20
in.
(50 cm) R
Est ablish howdeep thewater isand the
characterist icsofthe body ofwater before
fording.
R Vehicles withtheAIRMATIC package:
Select thehighest possible vehiclelevel.
R Restrict theshift range to1or 2.
R Avoid highengine speeds.
R Ent erand exitthewater ataflat place and
at asteady walking pace.
! Under nocircumst ancesshould you
accelerate beforeenteringthe water. The
bow wave could cause watertoenter and
damage theengine andother assemblies.
R Drive slowly andatan even speed through
the water.
R Do not stop.
! Donot open anyofthe vehicle's doors
while fording. Otherwise, watercouldget
into thevehicle interior anddamage the
vehicle's electronic sand interior
equipment.
R Water offersahigh degree ofresistance,
and theground isslippery andinsome
cases unstable. Therefore, itis difficult and
dangerous topull away inthe water.
R Ensure thatabow wave doesnotform as
you drive.
R Clea nany mud from thetire tread after
fording.
R Apply thebrakes todry them afterfording. Driving
tips
161Driving and parking Z

Winter
driving
Gene ralnote s G
WARNING If
the vehicl ebecome strappe din snow,
ensure thatsnow iskept away from the
exhau stpip eand from aroundthe vehicl eas
long asthe engine isrunning. Otherwise,
poi sonou scarbo nmonoxide (CO)mayenter
the vehicle, resulting inloss ofconsc iousness
and even death.
To assure sufficient freshairvent ilation, open
a window slightlyonthe side ofthe vehicle
not facing thewind.
At the onset ofwinter, haveyourvehicle
winterproof edataquali fiedspecialist
workshop, e.g.atan authorized Mercedes-
Benz Center. i
Vehicles
withadiesel engine: donot
cover theradiator, e.g.with aprotec tive
cover. Themeasuring functionofthe
Onboard Diagnosis Systemmayotherwise
provide inaccurate values.Someofthese
values arerequired bylaw and must
therefor ealwa ysbe accurate.
Driving withsumm ertires Observe
thenotesinthe "Winter operation"
section (Ypage 352).
Slippery roadsurfa ces G
WARNING The
outside temperature indicatorisnot
designed toserve asan ice-warnin gdevice
and istherefor eunsuitable forthat purpose.
Indicated temperatures justabove the
freezin gpoint donot guarantee thattheroad
surface isfree ofice. The road maystillbeicy,
especially inwooded areasoron bridges. G
WARNING On
slippery roadsurfaces, neverdownshift in
order toobtain braking action.Thiscould result
indrive wheel slipand reduced vehicle
cont rol.Your vehicle's ABSwillnotprevent
this type ofloss ofcont rol.
Drive particularly carefullyonslippery road
surfaces. Avoidsudden acceleration, steering
and braking maneuvers. Donot use thecruise
cont rolorDIS TRONIC PLUS.
If the vehicle threaten sto skid orcann otbe
stopped whenmoving atlow speed:
X Shift thetrans mission toposition N. i
For
more informat ionondriving with
snow chains, see(Ypage 353). G
WARNING Make
surethatyoudonot endanger other
road users whenyouapply thebrakes. Off-r
oaddriving
Import antsafety notes G
WARNING Grains
ofsand, particles ofdirt and other
abrasive materials canenter thebrake
system. Thiscanlead toexcessive wearand
unpredictable brakingefficienc y.
Aft erthe brakes havebeen exposed todirty
condit ions,havethem check edand cleaned
at aquali fiedspecialist workshop, e.g.an
authorized Mercedes-B enzCenter.
Otherwise, thereisarisk that braking power
may beinsufficient inthe event ofan
emergenc y,or that thebraking effectmaybe
unpredictable. G
WARNING Do
not load items onthe basic carrier bars.It
may cause instability duringsomemaneuvers
which couldresult inan accident .
Drive slowly inunkn ownterrain. Thiswill
make iteasier torecogn izeunexpect ed
obstacles andavoid damage tothe vehicle.
To help avoid thevehicle rollingover,never
turn itaround onsteep inclines. Ifthe vehicle 162
Driving
tipsDriving and parking

cannot
complete the attem ptedclimb, back it
dow ninr everse gear.
Do not drive along theside ofaslope. The
vehicle mightotherwiserollover. Ifin doing so
the vehicle beginstoshow aten dency toroll,
immediately steerintoaline ofgravity
(straight upordownhill).
Never letthe vehicle rollbackwards inidle.
You may losecontrol ofthe vehicle ifyou use
only theservic ebrake. Forinfor mation on
driving downhill, see"Drivin gdownhill". G
WARN
ING Vehicles
withairsuspension program:Please
be aware thatbyraising thevehicle level,the
cent erofgravity alsorises. Therefor e,alway s
ensure thatthevehicle levelisas low as
possible. Withhigher rideheight theESP®
may activat eearlier incert ainsituation s. G
WARN
ING Do
not reduce thetire inflation pressure
before driving through sand. However, ifyou
do so, remember tocorr ectthe tire inflation
pressure beforecontinuin gyour trip.Drivin g
with reduced tireinflation pressure increases
the risk oflosing control ofthe vehicle and
rolling over.
General notes Read
thissect ioncarefully beforedriving your
vehicle off-road. Practicebydriving overmore
gent leoff- road terrainfirst .
Familiarize yourselfwiththecharact eristics
of your vehicle andthegear shiftoperation
before driving through difficult terrain.
The following drivingsystems arespecially
adapted tooff- road driving:
R Off- road ABS(Ypage 61)
R AIRMA TICpackage (vehiclelevel)
(Y page 180)
R DS R(Downh illSpeed Regulation)
(Y page 208) Observe
thefollowing notes:
R Stop the vehicle beforestartingtodrive
along anoff- road route.
R For vehicles withAIRMA TICpackage:
select avehicle levelthatissuitable forthe
off- road terrain. Make surethere isalway s
sufficien tground clearanc eto preven t
damage tothe vehicle.
R Check thatitems ofluggage andloads are
stowed safelyandarewell secured
(Y page 288).
R Always keeptheengine runningand ingear
when driving onadownhill gradient.
Ac tivat eDS R(Ypage 208).
R Always keepthedoors, tailgate, windows
and sliding sunroof closedwhiledriving.
R Adapt yourspeed tothe terrain. The
rougher, steeperormore rutsonthe
terr ain, theslower yourspeed should be.
R Driv eslowly andatan even speed through
the water. Ensure thatabow wave doesnot
form asyou drive.
R Driv ewith extreme careonunkn ownoff-
road routes wherevisibility ispoor. For
safety reasons ,get out ofthe vehicle first
and survey theoff-road route.
R Look outforobstac lessuch asrock s,holes,
tree stumps andfurrows.
R Check thedepth ofwater before fording
rivers andstreams.
R When fording,do not stop anddonot
switc hoff the engin e.
R On sand, drivequickly tooverc omethe
rolling resistance. Otherwise, thevehicle
could digitself intothe sand.
R Do not jump withthevehicle asthis will
int errupt thevehicle's propulsion.
R Always keeptheengin erunn ingand ingear
when drivingon aslope.
R Do not shift theautomatic transmission to
tran smission positionN. Driving
tips
163Driving and parking Z