2012 MERCEDES-BENZ M-Class four wheel drive

X
Pull theleft orright release lever;
upwards inthe direction ofthe arrow until
the relevant backrest :isfully released.
X Pull thebackrest :forwards inthe
direction ofthe arrow andallow itto
engage.
X Lean backfirmly against thebackrest :to
ensure itis engaged. Adju
sting thefour- waylumbar
supp ort
You canadjust thecont ourofthe fron tseat
backrest sindividually toprovide optimum
support foryour back. :
Toraise thebackrest contour
; Tosoften thebackrest contour
= Tolower thebackrest contour
? Toharden thebackrest contour Switching
theseat heating on/off
Switching on/off G
WARNIN
G Repeatedly
settingthe seat heating tolevel
3 may result inexcess iveseat temperat ures.
The health ofpassengers thathave limited
temperat uresensit ivityoralimited abilityto
react toexcess ivelyhightemperat uresmay
be affect edorthey mayeven suffer burn-lik e
injuries. Therefore, donot use seat heating
level 3repeatedly. The
three redindicator lampsinthe button
indicate theheating levelyouhave selected. i
If
the batter yvoltage istoo low, theseat
heating mayswitch off. Driver
'sand front-passen gerseat Rear-compart
mentseats
The system automatically switchesdown
from level3to level 2after approximately
eight minutes.
The system automatically switchesdown
from level2to level 1after approximately ten
minutes.
The system automatically switchesoff
approximately 35minutes afteritis set to
level 1.
X Make surethattheSmart Keyisin position
1 or 2in the ignition lock.
X To switch on:press button :repeatedly
until thedesired heating levelisset.
X To switch off:press button :repeatedly
until allthe indicator lampsgoout. Seats
99Seats, steering wheel and mirrors Z

If
indicator lamp;islit:
X Press button :.
Indicator lamp;flash es.The vehicle is
adjus tingtohighw ay/high-spee dlevel .
Whil ethe adjus tment istaking place, a
messag eapp ears inthe multifu nction
disp lay,e.g.: If
you press the% ora button onthe
multifu nctionsteering wheel,the messag e
wil ldisa ppea r.
Once highw aylevel hasbeen reached ,
indicator lamp;goes out.The Lowering
messag
edisa ppea rsfrom themultifu nction
disp lay.
The vehicle automaticallyselects highway
level ifyou aredriving ataspeed above
50 mph (80km/h) orifyou drive for
app roximately 20seconds between40m ph
(64 km/ h)and 50mph (80km/ h).Depen ding
on the ADSm ode selected (Ypage 180), the
vehicle islowered tohigh-speed levelat
higher speeds. PARKTRON
IC
Import antsafety notes G
WARNIN
G The
PARKTRONIC isasupplemental system.
It is not inten dedto,nor does itreplace, the
need forextr eme care. Theresponsibility
during parking andother criticalmaneuvers
alway sremains withthedriver. G
WARNIN
G Make
surenopersons oranimals areinor
near thearea inwhich youareparking/ maneuvering.
Otherwise,theycould be
injured.
PARKTRONIC isan electron icparking aidwith
ultrasonic sensors.Itindicates visuallyand
audib lythe distance between yourvehicle
and anobject .
PARKTRONIC isactivated automatically when
you:
R switch onthe ignition
R shift thetrans mission toposition D,Ror N
R release theelectric parking brake
PARKTRONIC isdeactivated atspeeds above
11 mph (18km/ h).It is reactivat edatlower
speeds.
PARKTRONIC monitorsthe area around your
vehicle usingsixsensors inthe front bumper
and four sensors inthe rear bumper. :
Sensor sin the front bumper, left-hand
side (example)
Range ofthe sensors General
notes
The sensors mustbefree ofdirt, iceand
slush; otherwise theymaynotfunct ion
correc tly.Clean thesensors regularly ,takin g
care nottoscratc hor damage them
(Y page 322). Driving
systems
183Driving and parking Z

R
you switchon thetur ns ignals .Int his
event, thewarnings aresuppressed fora
certain periodoftime.
R adriving safetysystem interven es,e.g.
ABS ,BAS orESP ®
.
R you accelerate hard,e.g.kickdown.
R you brake hard.
R you steer actively, e.g.swerve toavoid
an obstacle orchange lanequickly.
R you cutthe corner onasharp bend.
Tra iler towing
When youattach atrailer, makesureyouhave
correct lyestablished theelectrical
conn ection. Thiscanbeaccomplished by
check ingthe trailer lighting. Off-r
oaddriving systems 4MATIC
(permanentfour-wheel drive)
4MATIC ensuresthatallfour wheels are
permanent lydriven. Together withESP®
and
4ETS, itimproves thetract ionofyour vehicle
whenever adrive wheel spinsdueto
insufficient grip. G
WARNING If
adrive wheel isspinning duetoinsufficient
tract ion:
R While driving off,apply aslittle throttleas
possible.
R While driving, easeupon the accelerator
pedal.
R Adapt yourspeed anddriving styletothe
prevailing roadcondition s.
Failure toobserve theseguidelinescould
cause thevehicle toskid.
The 4MATIC cannotprevent accidents
resulting fromexcessive speed.
! Never towthevehicle withoneaxle
raised. Thismay damage thetransf ercase.
Damage ofthis sort isnot covered bythe
Mercedes-Ben zLimited Warranty. All
wheels mustremain eitheronthe ground or
be fully raised. Observe theinstruct ions
for towing thevehicle withallwheels infull
cont actwith theground. i
In
wintry driving condition s,the maximum
effect of4MATIC canonly beachieved if
you usewinter tires(M+S tires ),wi th snow
chai nsifnecessa ry.
! Function orperfo rmance testsmayonly
be perfo rmed ona2-axle dynamome ter.If
you wish tooper atethe vehi cleonsuch a
dy namome ter,please consul tan
auth orizedMer cedes-Ben zCent er
beforehan d.You could otherwisedamage
the drive trainorthe brake system.
For infor mation aboutdriving off-road, see
(Y page 162). DSR
(Dow nhillSpeed Regulat ion)
Impor tantsafet ynotes DS
Rassists youwhen driving downhill. It
keeps thespeed oftravel atthe speed seton
the on-board comput er.The steeper the
downhill gradient,the greater theDSR
brakin geffec tonthe vehicle. Whendriving on
flat stret ches ofroad oron anuphill gradient,
the DSR braking effectisminimal ornon-
existent . G
WARNING Downhill
SpeedRegulation (DSR) isa
conven iencesystem designed toassist the
driver during vehicle operation. Thesystem
settin gmust beappropriate tothe
topographical andweather condition s
encount ered,which canchange quickly. The
driver isresponsible forthe vehicle speedand
for safe brake operation atall times.
Depending onthe programmed speed,actual
vehicle speedandgradient, switching onDSR
while driving cancause thevehicle toslow
down rapidly ,and youmay hear asound,
caused bythe activation ofthe vehicle's brake
system through DSR.Sudden andunexpected
deceleration canresult inloss ofvehicle 208
Off-r
oaddriving systemsDriving and parking

G
WARNING The
tirepressu reloss warni ngsystem does
not provid eawar ning forwrongl ysele cted tire
infla tion pressu res.Alwa ysadju sttire
infla tion pressu reaccordi ngtothe Tire and
Load ingInformation placard onthe drive r's
door B-pillaror on the tire infla tion pressu re
lab elloca tedonthe insid eof the fuel filler flap .
The tirepressu reloss warni ngsystem does
not repl ace regu larchecks ofthe tire infla tion
pressu ressince agrad ualpressu reloss in
more thanonetirecannot bedetected bythe
tire pressu reloss warning system.
The tirepressu reloss warni ngsystem isnot
abl eto issu eawar ning duetoasud den
drama ticloss oftire infla tion pressu re(e.g.
tire blow outcaus edbyaforeig nobjec t).In
this case bring thevehicle toahalt bycarefully
applying thebrakes andavoiding abrupt
steer ingmaneuver s.
The func tionofthe tire pressure losswarning
system islimited ordelayed if:
R snow chains aremount edtoyour vehicle's
tires.
R road condition sare wintr y.
R you aredriving onsand orgravel.
R you adopt avery sport ydriving style
(corn ering athigh speeds ordriving with
high rates ofaccelerat ion).
R you aretowing avery heavy orlarge trailer.
R you aredriving withaheavy load(inthe
vehicle oron the roof).
Resta rting the tirepr essure loss
warning system Restart
thetire pressure losswarning system
if you have:
R chang edthe tire pressure
R chang edthe wheels ortires
R mount newwheels ortires
X Befor erest artin g,con sult theTire and
Loading Informat ionplacard onthe
B- pillar onthe driver's sideorthe tire pressure
tableonthe inside ofthe fuel filler
flap toensure thetire pressure inall four
tires isset corr ectlyfor the curren t
operatin gcon dition s.
X Observe thenotesinthe sect ionontire
pressures (Ypage 353). G
WARN
ING The
tirepressure losswarning systemcan
only givereliable warning sif you have setthe
corr ecttire pressure.
If an incor recttirepressure isset, these
incor rectvalues willbemonit ored.
At ire with insufficientpress ureresult sin
vehic leinst ability whendriving,thus
inc reasin gthe risk ofan acc ident .
X Make surethattheSmartKey isin
posit ion2(Y page 139)int he ignition lock.
X Press the= or; button toselect the Serv. menu.
X Press the9 or: button toselect Tire
Pressure .
X Press thea button.
The Run
Flat Indicator Active Press
'OK'toRestart message
appea rsinthe multifunction display.
If you wish toconfirm therestar t:
X Press thea button.
The Tire
Pressure NowOK? message
appea rsinthe multifunction display.
X Press 9or: toselect Yes .
X Press thea button.
The Run
Flat Indicator Restarted message
appearsinthe multifunction
displa y.
Aft erateach-in period,thetire pressure
loss warning systemwillmonitor theset
tire pressures ofall four tires. 358
Tire
pressureWheels and tires

If
you wish tocancel theres tart:
X Pre ssthe% button.
or
X Ifth e Tir
ePre ssureNow OK? mes
sage
appear s,pre ss9 or: tosele ct Can
cel .
X Pre ssthea button.
The tirepre ssur evalues store dat thelast
res tartw illcon tinue tobe mon itored. Tir
epr essur emonit or
Imp ortant safety notes If
atir epress uremon itorsyst emisinst alled,
the vehic le'swheels havesensors that
mon itorthetirepress uresinall four tires. The
tir epress uremon itorwarns youifthe
press uredrops inone ormor eof the tires. The
tir epress uremon itoronly functionsif the
cor rectwheel electronic sunits areinstalled
on allwheels.
The tirepressure monitorhasayell ow
warning lampinthe instrumen tcluster for
indicating pressureloss/malfunction s(USA)
or pressure loss(Canada ).Whether the
warning lampflashes orlights upindicates
whether atire pressure istoo low orthe tire
pressure monitorin gsystem is
malfunctionin g:
R ifthe warning lampislit cont inuously ,the
tire pressure onone ormore tiresis
significantly toolow. Thetirepressure
monitor isnot malfunctionin g.
R USA only: ifthe warning lampflashes for
60 seconds andthen remains litconst antly,
the tire pressure monitorismalfunctionin g. G
WARNING Each
tire,including thespare (ifprovided),
should becheck edatleast once amont h
when coldandinflated tothe pressure
recommen dedbythe vehicle manufacturer
on the Tire andLoading Informationplacard
on the driver's doorB-pillar orthe tire
pressure labelonthe inside ofthe fuel filler flap.
Ifyour vehicle hastires ofadifferent size
than thesize indicated onthe Tire andLoading
Inform ationplacard orthe tire pressure label,
you should determine theproper tirepressure
for those tires.
As anadded safetyfeature, yourvehicle has
been equipp edwith atire pressure monitorin g
system (TPMS)thatilluminates alow tire
pressure telltalewhenoneormore ofyour
tires aresignificantly underinflated.
Acc ordingly, whenthelow tirepressure
telltale illuminates, youshould stopandcheck
your tires assoon aspossible, andinflate
them tothe proper pressure. Drivingona
significantly underinflated tirecauses thetire
to overheat andcanlead totire failure.
Underinflation alsoreduces fuelefficiency
and tiretread life,and may affect thevehicle's
handling andstopping ability.
Please notethattheTPMS isnot asubstitute
for proper tiremaintenanc e,and itis the
driver's responsibility tomaintain correcttire
pressure, evenifunderinflation hasnot
reached thelevel totrigger illumination ofthe
TPMS lowtirepressure telltale.
USA only:
Your vehicle hasalso been equipp edwith a
TPMS malfunction indicatortoindicate when
the system isnot operating properly.The
TPMS malfunction indicatoriscombined with
the low tirepressure telltale.Whenthe
system detects amalfunction, thetelltale will
flash forapproximately oneminute andthen
remain continuously illuminated. This
sequence willberepeated everytimethe
vehicle isstarted aslong asthe malfunction
exists.
When themalfunction indicatorisillu minated,
the system maynotbeable todetect orsignal
low tirepressure asintended. TPMS
malfunctions mayoccur foravariety of
reasons, including theinstallation of
incompatible replacementoralternate tires
or wheels onthe vehicle thatprevent the
TPMS fromfunctioning properly. Always
check theTPMS malfunction telltaleafter Tire
pressure
359Wheels and tires
Z

mounted
isnot thesame asthe spare
whee l/emerg encyspare wheel'scurrent
tire pressu re.
Tire pressure monitorwarning
message s If
the tire pressu remonitor detectsa
signifi cantpressu reloss onone ormore tires,
a warni ngmessa geisshow nint he
multifunction display.Aw arning tone also
soun dsand thetir epres sure warninglamp
light sup intheins trumen tcluster .
Eac htir ethat isaffec tedbyasign ificant loss
of press ureishighligh tedwith acolor .
If the Corr
ect Tire Pressure mess
age
appears inthe mult ifunc tiondisplay:
X Check thetirepress ureonallfour wheels
and correctit ifnec essary. i
If
the wheel positionsonthe vehic leare
int erc hang ed,the tirepress uresmaybe
displayed forthe wron gposit ionsfora
shor ttime. Thisisrec tified afterafew
min utes ofdrivin g,and thetirepress ures
are displayed forthe correctpositions.
Restar tingthetire pressur emonitor G
WARNIN
G It
is the driver's responsibility toset the tire
pressure tothe recommen dedcold tire
pressure. Underinflatedtiresaffect theability
to steer orbrake thevehicle. Youmight lose
cont rolover thevehicle.
When yourestart thetire pressure monitor,
all existin gwarning messages aredeleted and
the warning lampsgoout. Themonit oruses
the current lyset tire pressures asthe
referen cevalues formonit oring. Inmost
cases, thetire pressure monitoringsystem
recogn izesthenew referen cevalues
automatically. However,
youcan also define referen ce
values manually asdescribed here:
X Set thetire pressure (Ypage 353)tothe
value recomm endedforthe correspon ding
driving situation onthe Tire andLoading
Infor mation placard onthe driver's side
B-pillar.
Additional tirepressure valuesfordriving
at high speeds orwith heavy loadscanbe
found inthe tire pressure tableonthe
inside ofthe fuel filler flap.
X Make surethatthetire pressure iscorrec t
on allfour wheels.
X Make surethattheSmart Keyisin position
2 in the ignition lock.
X Press the= or; button onthe
steerin gwheel toselect the Serv. menu.
X Press the9 or: button toselect Tire
Pressure .
X Press thea button .
The multifunct iondisplay showsthe
current tirepressure ofthe individual tires
or the Tire
pressure willbe displayed
afterdriving afew minutes message.
X Press the: button .
The Use
Current Pressures asNew Reference
Values message
appearsin
the multifunct iondisplay .
If you wish toconfirm theresta rt:
X Press thea button .
The Tire
Press. Monitor Restarted message
appearsinthe multifunct ion
display .
Aft erdriving forafew minutes, thesystem
check swhether thecurrent tirepressures
are within thespecified range.Thenew tire
pressures arethen accepted asreferen ce
values andmonit ored.
If you wish tocancel theresta rt:
X Press the% button .
The tirepressure valuesstored atthe last
restart willcont inue tobe monit ored. Tir
epr essure
361Wheels and tires Z

You
should payspec ialattent ion toroad
con dition swhen temperat uresarearound
the free zingpoint .
Merc edes- Benzrecomm endsaminimum tire
tread depth of1
/ 6in
(4 mm) forallfour winter
tires (Ypage 352)tom aint ainnorm aldriv ing
ch arac teris tic sin wint er.Win tertir es can
reduc eth ebrak ingdist anceonsnow cove red
su rfa ces incomp arison tosumme rtires.
St oppin gdist ance,howeve r,is still
con siderably greaterthan when theroad is
not covered withiceorsno w.Take
appropr iatecare when driving.
! Avoid wheelspin .This can lead todamage
to the drive train. Temp
erature G
WARNING The
temperature gradeforthis tireis
established foratire that isproperly inflated
and notoverloaded. Excessive speed,
underinflation, orexcessive loading,either
separately orincombination, cancause
excessive heatbuild-upand possible tire
failure.
The temperature gradesareA(the high est),
B, and C.Theserep resent thetire's
res istanc eto the genera tiono fheat and its
ability todissipate heatwhen testedunder
con trolled conditions onaspecified indoor
laboratory testwheel. Sustain edhigh
temper aturecancause thematerial ofthe tire
to degenerat eand reduce tirelife, and
exc essive temper aturecanlead tosudden
tire failure. Thegrade Ccorresponds toalevel
of performanc ewhich allpassenger cartires
must meet under theFederal MotorVehicle
Safety Standard No.109. Grades Band A
represent higherlevelsofperformanc eon the
laboratory testwheel thantheminimum
required bylaw. Tire
labeling Tire
labeling overview
The following markings areonthe tire in
addition tothe tire name (sales designation)
and themanufacturer 'sname: :
Uniform tireQuality Grading Standard
(Y page 371)
; DOT, TireIdent ification Number
(Y page 370)
= Maximum tireload (Ypage 365)
? Maximum tirepressure (Ypage 356)
A Manufacturer
B Tire material (Ypage 371)
C Tire size designation, load-bearing
capacity andspeed rating(Ypage 368)
D Load index (Ypage 370)
E Tire name i
Tire
data isvehicle-specif icand may
deviate fromthedata inthe example. Tir
elabeling
367Wheels and tires Z