light MERCEDES-BENZ M-Class 2012 W166 Owner's Guide

!
The tailgate swingsupwardsand tothe
rear when opened. Therefore, makesure
that there issufficient clearance aboveand
behind thetailgate.
X Insert mechanical key;into opening in
trim :.
X Turn mechanical key;90° clockwise.
X Push mechanical key;inthe direction of
the arrow andopen thetailgate. Side
window s Importa
ntsafety notes G
WARNING When
opening orclosing thedoor windows,
make surethatthere isno danger ofanyone
being harmed bythe opening/closing
procedure.
The door windows areequip pedwith
automatic operationandtheanti-ent rapment
feature. Ifin automatic modeadoor window
encounters anobstruction thatblocks its
path, theanti-ent rapment featurewillstop the
door window andopen itslightly.
The door windows operatedifferently when
the switch ispull ed. See the"Proble mswith
door windows" sectionfordetails.
The closing ofthe door windows canbe
immediately haltedbyreleasi ngthe switch or,
if the switch waspulledpast theresistance
point andreleased ,by either pressing or
pull ing the respective switch. If
adoor window encounters anobstruction
that blocks itspath inacircumstance where
you areclosing thewindows bypressing and
holding the& button onthe SmartKey or
by pressing andholding thelock button
(vehicles withKEYLES S-GO)onanoutside
door handle, theanti-ent rapment featurewill
not operate.
Act ivate theoverride switchwhenchildren
are riding inthe back seats ofthe vehicle. The
children mayotherwise injurethemselves,
e.g. bybecoming trappedinthe door window
opening. G
WARNING Do
not keep anypart ofyour body upagai nst
the window panewhen opening awindow. The
downward motionofthe pane maypullthat
part ofyour body down between thewindow
pane andthedoor frame andtrap itthere. If
there isarisk ofentrapment ,release the
switch andpullitto close thewindow. Opening
andclosing theside
window s :
Front left
; Front right
= Rear right
? Rear left
The switches forallside windows arelocated
on the driver's door.There isalso aswitch on
each doorforthe corresponding sidewindow. Side
windows
85Opening/closing Z

Using
theSma rtKey i
The
Smar tKeymust beclose tothe
driver' sdoor handle.
X Point thetipofthe Smar tKeyatthe driver' s
door handle.
X Press andhold the& buttonunt ilthe
side windows andthesliding sunrooforthe
panorama roofwith power tilt/sliding
panel arefully closed.
X Make surethatallthe side windows andthe
sliding sunroof orpanorama roofwith
power tilt/sliding panelareclosed.
On vehicles withapanorama roofwith power
tilt/sliding panel:
X Press andhold the& button againuntil
the roller sunblinds ofthe panorama roof
with power tilt/sliding panelclose.
X To interru ptconve nienceclosi ng:
release the& button.
Using KEYLESS-GO The
KEYLE SS-GO key must beoutside the
vehicle. Allthe doors mustbeclosed. X
Touch recessed sensorsurface :onthe
door handle untiltheside windows andthe
sliding sunroof orthe panorama roofwith
power tilt/sliding panelarefully closed. i
Make
sureyouonly touch recessed
sensor surface :.
X Make surethatallthe side windows andthe
sliding sunroof orpanorama roofwith
power tilt/sliding panelareclosed. On
vehicles withapanorama roofwith power
tilt/sliding panel:
X Touch recessed sensorsurface :onthe
door handle againuntiltheroller sunblinds
of the panorama roofwith power tilt/
sliding panelclose.
X To interru ptconve nienceclosi ng:
release recessed sensorsurface :onthe
door handle. Resetting
theside window s
If aside window cannolonger beclosed fully,
you must reset it.
X Close allthe doors.
X Turn theSmartK eytoposition 1or 2in the
ignition lock.
X Pull thecorresponding switchonthe door
cont rolpanel untiltheside window is
completely closed(Ypage 85).
X Hold theswitch foranadditional second.
If the side window opensagainslightly:
X Immediately pullthecorresponding switch
on the door controlpanel untiltheside
window iscompletely closed(Ypage 85).
X Hold theswitch foranadditional second.
X Ifthe corresponding sidewindow remains
closed afterthebutton hasbeen released,
the side window hasbeen reset correct ly.
If this isnot thecase, repeat thesteps
above again. Problems
withtheside window s
Problem: aside window cannotbeclosed
because itis blocked byobject s,e.g.
leaves inthewindow guide.
X Remove theobje cts.
X Close theside window.
Problem :asidewindow cannotbeclosed
and youcannot seethecause. Side
windows
87Opening/closing Z

G
WARNING Clo
sing theside windo wswith increas edforce
or witho utthe anti-entrapme ntfeatu recoul d
lea dto serio usoreven fatalinjury .Make sure
th at nobody canbecome trapped when
clo singth eside windows.
If aside windowisobst ructeddurin gclo sing
and reopen sagain slightly:
X Imm ediat elyafterthewind owbloc ks,pull
th ecor respon dingswit chagain untilth e
side windowhas closed.
The side windowisclo sed with increas ed
for ce.
If aside windowisobst ructedagain during
clo singand reopen sagain slightly:
X Imm ediat elyafterthewind owbloc ks,pull
th ecor respon dingswit chagain untilth e
side windowhas closed.
The side wind owisclo sed with outtheant i-
ent rapm entfeat ure. G
WAR
NING Pullin
gand holdi ngtheswit chtoclo sethe
wind owimm ediat elyafterithad been blocked
two timeswill caus eth ewind owtoclo se
with outtheant i-entrapm entfeat ure foras
lon gas you hold theswit ch. Slid
ingsunroof Imp
ortant safety notes
Your vehicle may beequippe dwith aslidin g
sun rooforapanorama roofwith power tilt/
sliding panel.Inthe following section, the
term "sliding sunroof"refer sto both types of
sliding sunroof . G
WARN
ING When
openin gor closin gthe sliding sunroof ,
make surethatthereis no danger ofanyone
being harmed bythe openin g/closing
procedur e.
The sliding sunroof isequipped with
automatic operationandtheanti- entrapmen t feature.
Ifthe movem entofthe sliding sunroof
is block edduring theclosin gprocedu re,the
slid ing sunroof willstop andopen slightly.
The sliding sunroof operatesdiffere ntlywhen
the slidingsunroof switch ispresse dand held .
See the"Prob lemswiththesliding sunroof"
section formore details.
The opening/cl osingprocedu reofthe sliding
sunroof canbeimmed iatelyhal ted by
relea singthesliding sunroof switch or,ifthe
slid ing sunroof switch was moved pastthe
resista ncepoint andrelea sed,bymoving the
slid ing sunroof switch inany directio n. G
WARNING The
slidingsunroof ismade outofgla ss. Inthe
event ofan accide nt,the glassmay shatter.
This may resul tina no penin gin the roof.
In avehicle rollover, occupants notwearing
their seatbelts ornot wearing themproperly
may bethrown outofthe openin g.Such an
openin galso presen tsapoten tialforinjury for
occ upants wearing theirseatbelts properly,
as ent irebody parts orportion sof them may
protr udefrom thepassenger compartment.
! Only open thesliding sunroof ifit is free
of snow andice.Other wise, malfunc tions
may occur.
Do not allow anythin gto protr udefrom the
sliding sunroof .Othe rwise, the sealscou ld
be dama ged.
! Thewe ath ercan change abruptl y.Itcou ld
sta rtto rain or sno w.Ma kesure tha tthe
sl id ing sunroo fisclosed whenyouleave the
vehicle. Thevehicle electronics canbe
damage difwater enters thevehicle
interior. i
Resonance
noisescanoccur inaddition
to the usua lairflow noiseswhenthesliding
sunroof isopen. Theyarecaused byminor
pressure fluctuations inthe vehicle interior.
Change theposition ofthe sliding sunroof
or open aside window slightlytoreduce or
eliminate thesenoises. 88
Sliding
sunroofOpening/closing

Problems
withthesliding sunroof
Your vehicle maybeequipp edwith asliding
sunroof orapanorama roofwith power tilt/
sliding panel.Inthe following section,the
term "slidingsunroof" referstoboth types of
sliding sunroof.
Problem: thesunroof cannotbeclose d
and youcannot seethecause. G
WARNING You
could beseverely oreven fatally injured
when closing thesliding sunroof with
increased closingforceorifthe anti-
entr apment featureisdeactivated. Makesure
that nobody canbecome trappedwhen
closing thesliding sunroof.
If the sliding sunroof isobstruct edduring
closing andreopens againslightly:
X Immediately afterthesliding sunroof
blocks, pullthe2 switch inthe
overhead controlpanel downtothe point
of resistance andhold ituntil thesliding
sunroof isclosed.
The sliding sunroof isclosed withincreased
force.
If the sliding sunroof isobstruct edagain
during closing andreopens againslightly:
X Immediately afterthesliding sunroof
blocks, pullthe2 switch inthe
overhead controlpanel downtothe point
of resistance andhold ituntil thesliding
sunroof isclosed.
The sliding sunroof isclosed without the
anti-en trapment feature. G
WARNING Pressing
andholding thesliding sunroof
switch toclose thesliding sunroof
immediately afterithad been blocked two
times willcause thesliding sunroof toclose
without theanti-en trapment featureforas
long asyou hold theswitch.
! Ifthe sliding sunroof stillcannot be
opened orclosed asaresult ofa malfunction
,cont actaqual ified specialist
workshop. Sliding
sunroof
91Opening/closing 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). Correct
driver's seatposition Observ
ethe safet yguidelines onseat
adjust ment(Ypage 95).
X Check whether youhave adjust edseat =
properly.
Elec tricalseat adjust ment(Ypage 96)
When adjustingthe seat, make sure:
R you areasfar away fromthedriver' sair
bag aspossible.
R you aresitting inanor mal upright
position .
R you can faste nthe seat beltproperly. R
you have moved thebackrest toan
almost vertical position.
R you have setthe seat cushion angleso
that your thighs aregently supported.
R you can depress thepedals properly.
X Check whether thehead restraint is
adjusted properly(Ypage 97).
When doingso,make surethatyouhave
adjusted thehead restraint sothat theback
of your head issupported ateye level by
the cent erofthe head restraint .Also mak e
sure thatthehead restraint 'sfor e/af t
posit ionisadjust edsothat thehead
rest raint isnot too farfromt heback ofyour
head.
Observe thesafety guidelinesonsteering
wheel adjustment (Ypage 100).
X Check whether steeringwheel:is
adjusted properly.
Adjustin gthe steering wheelmanually
(Y page 101)
Adjustin gthe steering wheelelectrically
(Y page 101)
When adjusting thesteering wheel,make
sure:
R you can hold thesteering wheelwithyour
arms slightly bent.
R you can move yourlegsfreely.
R you can seeallthe displa ysinthe
instrumen tcluste rclearly.
Obser vethe safet yguideline sfor seat belts
(Y page 49).
X Check whetheryou have fastened seat
belt ;proper ly(Y page 51).
The seat beltshould:
R fit snug lyacro ssyour body
R be rout edacro ssthe middle ofyour
shoulder
R be rout edinyour pelvic areaacrossthe
hip joints
X Bef ore start ing off,adjust therear- view
mirr orand theexterior mirrors 94
Corr
ectdriver' sseat posit ionSeats, steering wheel and mirrors

(
Y page 103)in such away that youhave
a good viewofroad andtrafficcon dition s.
X Vehicles withamem oryfunct ion:save
the seat, steeringwheel andexterior mirror
sett ings (Ypage 105). Seats
Impor
tantsafet ynotes G
WARN
ING In
order toavoid possible lossofvehicle
con trol,all seat, head restraint ,steer ing
wheel andrear view mirror adjustm ents,as
well asfasten ingofseat belts, mustbedone
before settingthe vehicle inmot ion. G
WARN
ING Do
not adjust thedriver' sseat while driving.
Adj ustin gthe seat while drivingcould cause
the driver tolose controlof the vehicle.
Never travelin amovin gvehicle withtheseat
backr estinan exc essively reclinedposition as
this canbedangerous. Youcould slideunder
the seat beltinacollision .Ify ou slide under
it, the seat beltwould applyforceatthe
abdomen orneck .This could cause serious or
fatal injuries. Theseat backrest andseat belts
provide thebest restraint whenthewearer is
in aposition thatisas upright aspossible and
seat belts areproperly positioned onthe
body. G
WARNING Your
seatbeltmust beadjusted sothat you
can correct lyfasten yourseatbelt.
Observe thefollowing points:
R adjust theseat backrest untilyour arms are
slightly angledwhenholding thesteering
wheel.
R adjust theseat toacomfort ableseating
position thatstillallow syou toreach the
accelerator/brake pedalsafely. The
position shouldbeasfar back aspossible with
thedriver stillable tooperate the
cont rolsproperly.
R adjust thehead restraint sothat itis as
close tothe head aspossible andthecent er
of the head restraint supports theback of
the head ateye level.
R never placehands undertheseat ornear
any moving partswhile aseat isbeing
adjusted.
Failure todo socould result inan accident
and/or serious personal injury. G
WARNING The
electrically adjustableseatscanbe
operated atany time. Therefore, donot leave
children unattended inthe vehicle, orwith
access toan unlocked vehicle.Achild's
unsupervised accesstoavehicle couldresult
in an accident and/orserious personal injury. G
WARNING Acc
ording toaccident statistics,children are
safer when properly restrained inthe rear
seating positions thaninthe front seating
position. Thus,westron glyrecommen dthat
children beplaced inthe rear seats whenever
possible. Regardlessofseating position,
children 12years oldand under mustbe
seated andproperly securedinan
appropriately sizedinfant restraint ,toddler
restraint ,or booster seatrecommen dedfor
the size andweight ofthe child. Foradditional
information, see"Chil dren inthe vehicle".
Ac hild's riskofserious orfatal injuries is
significantly increasedifthe child restraint s
are not properly securedinthe vehicle and/
or the child isnot properly securedinthe child
restraint . G
WARNING For
your protect ion,drive onlywith properly
positioned headrestraint s.
Adjust thehead restraint sothat itis as close
to the head aspossible andthecent erofthe
head restraint supports theback ofthe head
at eye level. Thiswillreduce thepotent ialfor Seats
95Seats, steering wheel and mirrors
Z

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

Adj
usting thest eer ing wheel
ma nua lly :
Releas elev er
; Toadj ust thest eer ing whee lheig ht
= Toadj ust thest eer ing whee lpos ition
(fo re- and -aftadj ust men t)
X Push release lever: down comple tely.
The steer ing column isunl ocked.
X Ad jus tthe steering wheeltothe desired
position.
X Push release lever:upcompletely.
The steering columnislocked.
X Check ifthe steering columnislocked.
When doingso,trytopush thesteering
wheel upordown ortry tomove itin the
fore-and- aftdirection. Adjust
ingthe steering wheel
elec trically :
Toadjust thesteering wheelheight
; Toadjust thesteering wheelposition
(fore-and-aft adjustment) i Other
topics:
R EAS Y-ENTRY/EXI Tfeature
(Y page 102)
R Stor ingsettin gs(Ypage 105) Steering
wheelheating
Switching on/off X
Make surethattheSmartK eyisin position
2 in the ignition lock.
X To switch on/off: turnthelever inthe
direction ofarrow :or;.
Indicator lamp=lights uporgoes out.
Vehicles withoutKEYLESS-GO: when you
remove thekey from theignition lock,the
steering wheelheating isdeactivated.
Vehicles withKEYLE SS-GO: when youswitch
off the ignition andopen thedriver's door,the
steering wheelheating isdeactivated.
Problems withthesteering wheel
heating The
steering wheelheating 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
101Seats, steering wheel and mirrors Z

Mirrors
Rear-view
mirror
Rear-view mirror(manual anti-glare) X
anti-gl aremode: flickanti-gla re
swi tch :forwa rdsorback. Exteri
ormirrors
Adjusting theexteri ormirrors G
WARNING Exercise
carewhen using the passenger-si de
exterior rearview mirror. Themirror surface
is convex (outward lycurved surfacefor a
wid erfiel dof view ).Objects inmirror are
closer thantheyappear. Checkyou rinteri or
rea rvie wmir ror and glance overyo ur
sho ulde rb efore changin glanes.
The exterior mirror sare automatic allyheated
if the rear window defrosterisswitched on
and theoutside temperatureislow. X
Make surethattheSmart Keyisin position
1 or 2in the ignition lock.
X Press button :for the left- hand exterior
mirror orbutton ;for the right- hand
ext erior mirror .
The indicat orlamp inthe corr espondin g
button lightsupinred.
The indicat orlamp goesoutagain after
some time.Youcanadjust theselect ed
mirror usingadjustm entbutton =aslong
as the indicat orlamp islit.
X Press adjustm entbutton =up, down, to
the right ortothe left until theexterior
mirror isset toaposition thatprovides you
with agood overview oftraff iccon ditions .
Folding theexterior mirrorsin or out
electrically X
Make surethattheSmart Keyisin position
1 or 2in the ignition lock.
X Briefly pressbutton :.
Bot hext erior mirror sfold inor out. i
Make
surethattheexterior mirror sare
alway sfolded outfully while thevehicle is
in motion ,as they mayother wisevibrate. i
If
you aredriving fasterthan
30 mph (47km/ h),you can nolonger fold
in the exterior mirror s.
Sett ingthe exterior mirrors If
the batter yhas been discon nectedor
complet elydischarged, theexterior mirror s
must bereset. Theexterior mirror swill Mirr
ors
103Seats, steering wheel and mirrors Z

otherwise
notfold inwhen youselect the
"Fold inmirrors whenlockin g"funct ioninthe
on-board computer (Ypage 237).
X Make surethattheSmart Keyisin
position 1in the ignition lock.
X Briefly pressbutton :.
Folding theexterior mirrorsinor out
aut omat ically If
the "Fold inmirrors whenlockin g"funct ion
is activated inthe on-board computer
(Y page 237):
R the exter iormirrors foldinautomatically as
soon asyou lock thevehicle fromthe
outside.
R the exter iormirrors foldoutagain
automatically assoon asyou unlock the
vehicle andthen open thedriver's orfront -
passenger door. i
The
mirrors donot fold outifthey have
been folded inmanually .
Exterior mirrorout ofposition If
an exter iormirror hasbeen pushed outof
position, proceedasfollows:
X Vehicles withoutelectrically folding
exterior mirrors: move theexter iormirror
into thecorrec tposition manually.
X Vehicles withelectrically folding
exterior mirrors: press andhold the
mirror- folding button(Ypage 103)untilyou
hear themirror engage inposition.
The mirror housing isengaged againand
you can adjust theexter iormirrors asusual
(Y page 103). Automa
ticanti-glar emirr ors G
WARNIN
G If
incident lightfrom headlamps isprevent ed
from strikingthe sensor inthe rear-view
mirror, forinstan ce,byluggage piledtoohigh in
the vehicle, themirror's automatic anti-
glare functionwill notoperate.
Inc ident lightcould thenblind you.Thismay
distract youfrom thetraffic conditionsand,
as aresult, youmay cause anaccident .
The rear-view mirrorandtheexter iormirror
on the driver's sideautomatically gointo anti-
glare mode ifthe ignition isswitched onand
incident lightfrom headlamps strikesthe
sensor inthe rear-view mirror.
The mirrors donot gointo anti-glare mode if
reverse gearisengaged orthe interior lighting
is switched on. Park
ingposition forthe exterior
mirr oron the front- passenger side
Setting andstoring theparking position You
canposition thefront -passenger side
exter iormirror insuch away that youcan see
the rear wheel onthat side assoon asyou
engage reverse gear.Youcanstore this
position. X
Make surethatthevehicle isstation aryand
that theSmart Keyisin position 2in the
ignition lock.
X En gage reverse gear.
The exter iormirror onthe front -passenger
side moves tothe preset parking position.
X Use adjustmen tbutton =toadjust the
exter iormirror toaposition thatallows you
to see therear wheel andthecurb.
The parking position isstored. 104
Mirr
orsSeats, steering wheel and mirrors