MERCEDES-BENZ M-Class 2012 W166 Owner's Manual

3
T
Parking lamps,license plateand
inst rument clusterlighting
4c Automaticheadlamp mode/daytime
runnin glamps
5L Low-beam/high- beamheadlamps
BR Rearfoglamp
The turn signals, high-beam headlamps and
the high-beam flasherareoperated usingthe
combinat ionswitch (Ypage 111).
! Ifthe batter yhas been excess ively
discharged, theparking lampsorstandin g
lamps areautomatically switchedoffto
enable thenext engine start.Always park
your vehic lesafely andsufficien tlylit
acc ordin gto legal standard s.Av oid the
con tinuous useofthe T parkinglamps
for sever alhours. Ifpossible ,switc hon the
X rightorthe W leftstandin glamp.
The exterior lighting(exc eptthepark ing/
st andin glamps) switchesoffautom atically if
you:
R remo vethe SmartKey fromt heignition lock
R open thedriver's doorwiththeSmartK ey
in position 0
If you hear awarning tonewhen youleave the
vehicle, thelights maystillbeswitched on.
X Turn thelight switch toc orÃ.
Low -beam headlam ps X
To switch onthe low-be amheadlam ps:
turn theSmartK eyinthe ignition lockto
position 2or start theengine.
X Turn thelight switch toL.
The L indicator lampinthe instrumen t
cluster lightsup.
Daytime runninglamps Daytime
runninglampsinCanada
The daytime runninglampsfunctionis
required bylaw inCanada .Itc ann otthere fore
be deac tivate d. X
Turn thelight switchtoc orÃ.
Wit hth een gin erun ning:depen dingon the
ambie ntlight ,th edayti merunninglamps or
th elow- beam headlam psare swit ched on.
When thelow- beam headlam psare
swit ched on,th eL indicat orlamp inthe
ins trumen tcluster lightsup.
When theengineisrunn ingand thevehic leis
st ation ary:ifyou mov ethe selec torlever from
a drive positiontoP,the daytime running
lamps/ low-beamheadlamps goout after
thr ee min utes.
When theengineisrunn ing,thevehic leis
st ation aryand inhigh ambien tlight
bright ness:ifyou turnthe light switch
to T, thedaytime runninglampsandthe
parking lampsareswitched on.
If the engine isrunning andyouturn thelight
switch toL, themanual settingstake
precedence overthedaytime runninglamps.
Daytime runninglampsinthe USA
In the USA, thedaytime runninglampsare
deactivated upondelivery fromthefactory.
X To activate thedayt imerunning
lamps: activate thedaytime runninglamps
funct ioninthe on-board computer
(Y page 234).
X Turn thelight switch toc orÃ.
With theengine running: depending onthe
ambient light,thedaytime runninglampsor
the low-beam headlampsareswitched on.
When thelow-beam headlampsare
switched on,the L indicator lampinthe
instrumen tcluster lightsup.
If the engineisrunn ingand youturnthe light
switch toT orL, themanual settings
take precedence overthedaytime running
lamps. Exterior
lighting
109Lights and windshield wipers

Aut
oma tic hea dlamp mod e X
To swit chon autom atic hea dlamp
mod e:tur nth eligh tswit chtoc or
Ã.
Sm artKey inpos ition 1in theign ition lock:
th epark inglamp sare swit ched on oroff
auto maticallydepe nding onthebrig htne ss
of theambi entlight .
With theenginerunn ing:depen dingonthe
bright nessof the ambien tlight ,the daytime
runn inglamps 6
or the low-be amheadlamps
are switc hedonoroff autom atically.
When thelow-be amheadlamps are
switc hedon,the L indicatorlamp inthe
inst rumen tcluster lightsup. G
WARN
ING If
the light switc his set toc orÃ, the
low-be amheadlamps willnotcom eon
autom atically ifit is fogg y.This could
endan geryou and others. There fore,tur nthe
light switch toL infog.
The automatic headlampfeature isonly an
aid. Thedriver isresponsible forthe vehicle's
lighting atall times.
Rear foglamp X
To switch onthe rear foglamp: turnthe
SmartK eyinthe ignition locktoposition 2
or start theengine.
X Turn thelight switch toL orc or
Ã.
If the light switch isset toc orÃ,
the rear foglamp onlylights upifthe low-
beam headla mpsareon.
X Press theR button.
The yellow R indicator lampinthe
instrumen tcluster lightsup.
X To switch offther ear foglam p:pres sth e
R button.
The yellow Rindicatorlamp inthe
ins trumen tcluster goesout. i
If
you switc hthe engineoff(Sm artKey in
posit ion1in the ignit ionlock )and then
rest artit,the prev ious rearfoglamp
set tings are rest ored.
Rea rfog lamp X
To switch ontherea rfog lamp:tur nthe
Sm artKey inthe ignit ionlock toposit ion2
or start the engin e.
X Turn thelight switc hto L orc or
Ã.
If the light switc his set toc orÃ,
the rear foglamp onlylightsup ifthe low-
beam headlamps areon.
X Press theR button.
The yellow Rindicatorlamp inthe
inst rumen tcluster lightsup.
X To switch offther ear foglam p:pres sth e
R button.
The yellow Rindicatorlamp inthe
ins trumen tcluster goesout. i
If
you switc hthe engineoff(Sm artKey in
posit ion1in the ignit ionlock )and then
rest artit,the prev ious rearfoglamp
set tings are rest ored.
Head lampcleaning system The
headlamps areclean edautomat icallyif
the "Wipe withwasher fluid"function is
operat edten timeswhile thelight sare onand
the engin eis runn ing(Ypage 118).When you
switc hoff the ignit ion,theautomat ic
headlamp cleaningsyste misreset and
counting isresumed from0.
6 Only ifdaytime runninglampshavebeen activated viathe on-board computer. 110
Exterior
lightingLights and windshield wipers

Comb
inationswit ch
Tu rn signa ls :
High-beam headlam ps
; Right turns ignal
= High- beam flasher
? Left turnsign al
X To indica tebrief ly:press thecom binat ion
switc hbrief lyto the press urepoint inthe
direc tionofarrow ;or?.
The correspo ndingtur nsignal flashes three
tim es.
X To indica te:press thecom binat ionswitc h
beyond thepress urepoint inthe direc tion
of arrow ;or?.
High- beam headlamps X
To switch ontheh igh-b eamhead lamps:
turn theSmar tKey inthe ignit ionlock to
posit ion2or star tthe engin e.
X Turn thelight switc hto L orc or
Ã.
X Press thecom binat ionswitc hbeyond the
pressure pointinthe direct ionof
arrow :.
In the c orà position ,the high-
beam headlamps areonly switched on
when itis dark andtheengin eis runn ing. The
K indicat orlamp inthe instrument
cluster lightsupwhen thehigh-beam
headlamps areswitch edon.
X To switch offthe high-bea m
headla mps:move thecombin ationswitch
back toits norm alposition .
The K indicat orlamp inthe instrument
cluster goesout.
High-beam flasher X
To switch on:turn theSmart Keyinthe
ignition locktoposition 1or 2or start the
engin e.
X Pull thecombin ationswitch inthe direct ion
of arrow =. Haz
ard warning lamps The
hazard warning lampsautomatic ally
switch onif:
R an air bag isdeployed.
R the vehicle isslowed downseverely froma
speed ofover 45mph (70km/ h)and comes
to ahalt.
X To switch onthe hazard warning lamps:
press button :.
All turn signals flash.Ifyou now switch on
a turn signal usingthecombin ationswitch ,
only theturn signal lamponthe
corr espondin gside ofthe vehicle willflash.
X To switch offthe hazard warning
lamp s:press button :. Exterior
lighting
111Lights and windshield wipers Z

The
hazard warning lampsaredeactivated
automatically ifthe vehicle returnsto aspeed
of over 6mph(10 km/h)after afull
application ofthe brakes. i
The
hazard warning lampsstilloperate if
the ignition isswitched off. Adapt
iveHighbeam Assist
You canusethis funct iontoset the
headlamps tochange between lowbeam and
high beam automatically. Thesystem
recogn izesvehicles withtheir lights on,either
approaching fromtheopposite direction or
traveling infron tof your vehicle, and
cons equently switches theheadlamps from
high beam tolow beam.
The system automatically adaptsthelow-
beam headlamp rangedepending onthe
distanc eto the other vehicle. Oncethe
system nolonger detectsany other vehicles,
it reactivat esthe high-beam headlamps.
The system's opticalsensorislocated behind
the windshield neartheoverhead control
panel. X
To activat e:activat ethe Adaptive
Highbeam Assistfunctionusing theon-
board computer (Ypage 234).
X Turn thelight switch toc orÃ. X
Press thecombinat ionswitch beyond the
pressure pointinthe direction ofarrow :
(Y page 111).
If it is dark andthelight sensor activates
the low-beam headlamps, the_
indicator lampinthe instr ument cluster
lights up.
If you drive faster thanapproximately
28 mph (45km/ h):
the headlamp rangeisset automatically
depending onthe distanc ebetween the
vehicle andother roadusers.
If you drive faster thanapproximately
35 mph (55km/ h)and noother roadusers
are identified:
the high-beam headlamps areswitched on
automatically. The
K indicator
lampin
the instr ument cluster alsolights up.
When youdrive slower thanapproximately
30 mph (45km/ h)or ifother roadusers
are identified orifthe roads aresufficient ly
illuminated:
the high-beam headlamps areswitched off
automatically. TheK indicator lampin
the instr ument cluster goesout.The_
indicator lampinthe instr ument cluster
stays on.
X To deactivat e:move thecombinat ion
switch backtoits normal position.
The _ indicator lampinthe instr ument
cluster goesout. G
WARNIN
G The
Adaptive Highbeam Assistisonly anaid
inten dedtosupport youwhile driving. The
driver isand remains responsible forproper
vehicle lighting inaccordanc ewith the
prevailing light,sightandtrafficcondit ions.
The system maybeimpaired orunavailable
when
R visibility ispoor, e.g.due tosnow, rain,fog,
or heavy spray
R the optical sensorareaofthe windshield is
dirty, fogged up,orcovered byastick erfor
example 112
Exterior
lightingLights and windshield wipers

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 switcho ff:set the rocker switch tothe
| position.
The interior lighting automatical lyswitches
on ifyou :
R unlock thevehicl e
R open adoor
R remove theSmartKey fromtheignitio nlock
The interior lightisactivated forashort while
when theSmart Keyisremoved fromthe
ignition lock.Youcanactivate thisdelay ed
switch- offusing theon-board computer
(Y page 235).
Manua linterior lighting control X
To switch thefront interior lighting on:
set the rock erswitch tothe c position.
X To switch thefront interior lighting off:
set the rock erswitch tothe | position.
X To switch therear interior lighting on/
off: press theu button .
X To switch thereading lampson/off:
press thep button . Crash-
responsive emergency lighting
The interior lighting isactivated automatically
if the vehicle isinvolved inan accident .
X To switch offthe crash- responsive
emergency lighting:pressthehazard
warning lampbutton .
or
X Lock andthen unlock thevehicle usingthe
Smart Key. Replacing
bulbs Import
antsafety notes
Xenon bulbs If
your vehicle isequipped withXenon bulbs,
you can recogn izethis bythe following: the
cone oflight from theXenon bulbsmoves
from thetop tothe bottom andback again when
youstart theengine. Forthis tobe
observed, thelights mustbeswitched on
before startingthe engine. G
DANGER Xenon
bulbscarryahigh voltage. Youcould
get anelectric shockandbeseriously oreven
fatally injured ifyou touch theelectric
cont acts onXenon bulbs.Therefore, never
remove thecover fromXenon bulbs.
Do not change Xenonbulbsyourself, buthave
them replaced ataquali fiedspecialist
workshop whichhasthenecessary specialist
knowledge andtools tocarry outthework
required.
Mercedes-B enzrecommen dsthat youusean
authorized Mercedes-B enzCenter forthis
purpose. Inparticular, workrelevant tosafety
or on safety-related systemsmustbecarried
out ataquali fiedspecialist workshop.
Bulbs andlamps areanimportant aspectof
vehicle safety.Youmust therefor emake sure
that these functioncorrec tlyatall times.
Have theheadlamp settingcheck edregularly .
Other bulbs There
arebulbs otherthantheXenon bulbs
that youcann otreplace. Replaceonly the
bulbs listed (Ypage 115). Havethebulbs that
you cann otreplace yourself changed ata
quali fiedspecialist workshop.
Mercedes-B enzrecomm endsthatyouusean
authorized Mercedes-B enzCenter forthis
purpose. Inparticular, workrelevant tosafety
or on safety-related systemsmustbecarried
out ataquali fiedspecialist workshop.
If you require assistance changingbulbs,
consult aquali fiedspecialist workshop.
Do not touch theglass tubeofnew bulbs with
your bare hands. Evenminor contamination
can burn intotheglass surface andreduce
the service lifeofthe bulbs. Always usealint-
free cloth oronly touch thebase ofthe bulb
when installing.
Only usebulbs ofthe correc ttype. 114
Rep
lacingbul bsLights an dwindshield wipers

If
the new bulbstill does notlightup,con sult
a qualified specialist workshop.
Bulbs andlamps areanimport antaspect of
vehicle safety.Youmust therefore make sure
that these function correctlyat all times .
Have theheadlamp settingchec kedregularly. G
WARN
ING Bulbs
andlamps canbevery hot.Youshould
ther efore allowthemtocool down before you
chang ethem .Othe rwise, yo ucou ldbe burned
if yo utou chthe m.
Kee pbu lbsou to fthe reach ofchildren.
Otherwise, theycould damage thebulbs, for
example, andinjure themselves.
Never useabulb which hasbeen dropped.
Such abulb maybreak oreven explode and
injure you.
Halogen bulbsarepressurized andcan
explode whenyouchange them,particularly
if they arevery hot.Youshould therefore wear
eye protect ionand gloves whenyouare
changing them. Overview:
changingbulbs/bulb types
You canchange thefollowing bulbs.Thebulb
type canbefound inthe legend. Halogen
headlamps
: Low-beam headlamp:H755W
; High-beam headlamp:H755W
= Parking lamp/standing lamp:W5W BV
? Side marker lamp:WY5W Tail
lamp
: Brake lamp:P21 W-L Changing
thefront bulbs
Removing andinstalling thecover inthe
front wheel arch You
must remove thecover fromthefront
wheel housing beforeyoucan change the
front bulbs. X
To remove: switchoffthe lights.
X Turn thefront wheels inwards.
X Slide upcover :and liftitout.
X To install: insertcover:again andslide
it downwards untilitengages. Replacing
bulbs
115Lights and windshield wipers Z

Low-bea
mheadlam ps(ha logen
hea dlamp s) X
Remov eth ecov erinthefron twheel arch
(Y page 115).
X Turn housin gcov er: coun ter-clo ckwise
and pullitout.
X Turn bulbholde r; coun ter-clo ckwise and
pull itout .
X Take thebulb outofbulb holde r;.
X Inser tthe new bulb intobulb holder ;.
X Insert bulbholder ;into thelamp andturn
it clockwise.
X Align housing cover:and turn it
clockwise untilitengages.
X Repla cethe cover inthe front wheel arch
(Y page 115).
High-beam headlamps(halogen
headlam ps) X
Switch offthe lights.
X Open thehood. X
Turn housing cover:counter- clockwise
and pullitout.
X Pull lever =upwa rdsand remove bulb
holder ;.
X Take thebulb outofbulb holder ;.
X Insert thenew bulb intobulb holder ;.
X Simultaneously pressbulbholder ;and
pull lever =downwards.
X Align housing cover:and turn it
clockwise untilitengages.
Parking lamps/sta ndinglamps
(halogen headlamps) X
Turn housing cover:counter- clockwise
and pullitout.
X Pull outbulb holder ;.
X Take thebulb outofbulb holder ;.
X Insert thenew bulb intobulb holder ;.
X Insert bulbholder ;.
X Align housing cover:and turn it
clockwise untilitengages. 116
Replacing
bulbsLights and windshield wipers

Side
markerlamp s X
Remove thecover inthe front wheel arch
(Y page 115).
X Turn cap;counter -clockwiseandremove
it.
X Pull outbulb holder :.
X Take thebulb outofbulb holder :.
X Insert thenew bulb intobulb holder :.
X Insert bulbholder :.
X Align cap;and turn itclockwise.
X Inst allthe cover inthe front wheel arch
(Y page 115). Changing
therear bulbs
Opening andclosi ngthe service flap You
must opentheservice flapinthe cargo
compartmen tbefore youcan change the
bulbs inthe taillamps. Left-
hand service flap Right-hand
serviceflap
X To open: release serviceflap:atthe top,
e.g. with ascrewdriver, andswing it
downward inthe direction ofthe arrow.
X Right side:remove thefirst- aidkit
beforehand andpulltheparcel netdown.
X To close :reinsert serviceflap:.
Bra kelamp X
Switch offthe lights.
X Open thecargo compartmen t.
X Open theservice flap(Ypage 117). :
Brake lamp
X Turn thebulb holder counter -clockwiseand
remove it.
X Remove thebulb from thebulb holder.
X Insert thenew bulb intothebulb holder.
X Insert thebulb holder andturn itclockwise.
X Close theservice flap(Ypage 117). Replacing
bulbs
117Lights and windshieldwipers Z

Windshi
eldwipers Swi
tchin gthe windshie ldwipers on/
off G
WARNING Wip
erbla des arecomponents thataresub ject
to wea rand tea r.Re place thewipe rb lades
twic eayear, preferably inthe sprin gand fall.
Oth erwise thewindows willnotbewiped
proper ly.As aresult ,you may notbeable to
obser vesurro undin gtraffic condition sand
could cause anacc ident .
! Donot operat ethe windsh ieldwipers
when thewindsh ieldisdry, asthis could
damage thewiper blades. Moreover,dust
that hascollec tedonthe windsh ieldcan
scr atc hthe glass ifwiping takesplace when
the windsh ieldisdry.
! Ifthe windsh ieldwipers leavesmear son
the windsh ieldafterthe vehic lehas been
washed inan autom aticcarwash, waxor
oth erresidues maybethe reason forthis .
Clean thewindsh ieldusing washer fluid
aft erwashing thevehic lein an autom atic
car wash. Combin
ationswitch
1 $ Winds hieldwipers off
2 Ä Inter mit ten twipe, low7
3 Å Inter mit ten twipe, high8
4 ° Continuous wipe,slow
5 ¯ Continuous wipe,fast B
í Single wipe
C î Towipe withwasher fluid
X Swit chon the ignit ion.
X Turn thecom binat ionswitc hto the
appropr iateposit ionorpress thebutt onon
the side.
! Inter mit ten twiping withrainsensor: due
to optic alinf luenc esand thewindsh ield
becom ingdirtyin dry weather condition s,
the windsh ieldwipers maybeact ivate d
inadv ertent ly.This could thendamage the
wind shieldwiper blades orscrat ch the
wind shield.
For this reas on,you should always switch
off thewind shieldwiper sin dry weat her.
In theÄ orÅ position,theappro priate
wipin gfrequen cyisset auto maticall y
acc ording totheint ensityof therain .In
th eÅ position,therain sensor ismor e
sen sitive than intheÄ position,caus ing
th ewind shieldwiper sto wipe more
fr equen tly. Swit
ching therea rwindow wiperon/
off Combin
ationswitch
: è Rearwindow wiperswitch
2 b Towipe withwasher fluid
3 ° Toswitc hon intermit tentwiping
7 Rain sensorset tolow sens itivity.
8 Rain sensorset tohigh sensitivity. 118
Wind
shield wipersLights and windshield wipers