2012 MERCEDES-BENZ M-Class ignition

Disp
laymessa ges Poss
iblecauses/c onseq uences and M Solu
tions The
yello w! warning lamp lightsup. The redF (USA
on ly)/ ! (Canadaonly) indic ato rlamp flashes for
appro ximately10 sec onds aftertheelec tric park ingbrak ehas
been applied orrele ased. Itth en goes outorrem ains lit.
The electric park ingbrak eis malf unctionin g.
X Swit choff theign ition and turnit back on.
X En gage theelec tric park ingbrak e.
If it is no tp ossible toengage theelectric parking brake:
X Shift thetrans mission toP.
X Visit aquali fiedspecialist workshop.
If it is not possible torelease theelectric parking brake:
X Release theelectric parking brakeautomatically (Ypage 156).
If the electric parking brakestillcann otbe released:
X Consult aquali fiedspecialist workshop. The
yellow !warning lamplights up.When yourelease orapply
the electric parking brakemanually ,the red F (USA
only)/ !(Canada only)indicator lampflashes.
The electric parking brakeismalfunct ioning.Itis not possible to
apply theelectric parking brakemanually .
X Shift thetrans mission toP.
X Visit aquali fiedspecialist workshop. F(USA
only)!(Canada
only) Pkg
Brake Inoperative The
yellow !warning lamplights up.The redF (USA
only)/ !(Canada only)indicator lampflashes for
approximately 10seconds aftertheelectric parking brakehas
been applied orreleased. Itthen goes outorremains lit.
The electric parking brakeismalfunct ioning,e.g.because of
overvoltage orundervoltage.
X Remove thecause forthe overvoltage orundervoltage, e.g.by
charging thebattery orrestart ingthe engine.
X En gage orrelease theelectric parking brake.
If it remains impossible toapply orrelease theelectric parking
brake:
X Switch offthe ignition andturn itback on.
X En gage orrelease theelectric parking brake.
If the electric parking brakestillcann otbe released:
X Consult aquali fiedspecialist workshop. Display
messages
243On-board computer and displays Z

Disp
laymessa ges Poss
iblecauses/c onseq uences and M Solu
tions The
displaymes sage ison lysho wnwhile theveh icleis in mot ion.
The yello w! warning lamp lightsup and thered F (USA
on ly)/ ! (Canadaonly) indic ato rlamp flashes.
It is no tp ossible toapply theelectric parking brakemanually .
X Shift thetrans mission toP.
X Visit aquali fiedspecialist workshop. F(USA
only)!(Canada
only)
Turn
Onthe Ignition
to Release
the Parking
Brake The
redF (USAonly)/ !(Canada only)indicator lamplights
up.
You attempt edtorelease theelectric parking brakewhilethe
ignition wasswitched off.
X Smar tKey: turntheSmart Keytoposition 1in the ignition lock.
X KEYL ESS-GO: switchonthe ignition. $(USA
only)J(Canada
only)
Check
BrakeFluid Level G
Risk
ofaccident There
isnot enough brakefluidinthe brake fluidreservoir.
Additionally, thered $ (USAonly)/ J(Canada only)
warning lamplights upinthe instr ument cluster andawarning
ton esounds.
X Pull over andstop thevehicle safelyassoon aspossible, paying
atten tiontoroad andtraffic conditions.Donot cont inue driving
under anycircumst ances.
X En gage theelectric parking brake.
X Consult aquali fiedspecialist workshop.
X Do not add brake fluid.Thiswillnotrect ifythe malfunct ion. G
WARNIN
G Drivin
gwith themessage Check Brake Fluid Level display
edcan result inan accident .Have
your brakesyst emcheck edimm ediat ely.
Do notadd brake fluidbefore checkingthe brake system. Overfillingthebrake fluidreserv oircan
result inspilling brakefluidonhot engin eparts andthebrake fluidcatching fire.Youcanbe
seriously burned. 244
Display
messagesOn-board computer and displays

Disp
laymessa ges Poss
iblecauses/c onseq uences and M Solu
tions Fro
ntPassenger Air
bag Enabled See
Operator's Man
ual The
fron t-pass enger airbag isen abled duringthejo urn ey, even
th ough :
R ach ild, asm alladult oran obj ectw eighing lessthan the
system' sweight threshold islocated onthe fron t-passenger
seat.
R the fron t-passenger seatisunocc upied.
The system maydetec tobjec tsor forc esapplying additional
weight onthe seat.
X Pull over andstop thevehicle safelyassoon aspossible, paying
att ent ion toroad andtrafficcon dition s.
X En gage theparkin gbrake.
X Switc hoff the ignit ion.
X Open thefron t-passenger door.
X Remove thechild andthechild restraint system fromthefron t-
passenger seat.
X Ifnec essary, securethechild inachild restraint system ona
suitable rearseat.
X Make surethatthereare noobjec tson the seat adding tothe
weight.
The system mayother wisedetec tthe additional weightand
interpret theseat occupant's weightasgreater thanitactually
is.
X Keep theseat unoccupied, closethefront -passenger doorand
switch onthe ignition.
Observe the45(Y page44)indicator lampandthe
multifunction displayand check thefollowing:
Seat unoccupied andignition switched on:
R the 45 indicatorlampmust lightupand remain lit.When
the indicator lampison, OCS (Ypage 44)has deactivated the
front -passenger airbag.
R the Front
Passenger AirbagEnabled SeeOperator's Manual or Front
Passenger AirbagDisabl'd See Operator's
Manual displa
ymessages mustnotappea rint he
multifunction display.Wait foraperiod ofat least 60seconds
until thenecessary systemcheckshave been completed andto
make surethatthedispla ymessages donot appea rint he
multifunction display.
If these condition sare fulfilled ,the front -passenger seatcanbe
occupied again.Whether the45 indicatorlampremains lit
or goes outdepends onhow OCS classifies theoccupant.
If the condition sare not fulfilled ,the system isnot operating
correct ly. 248
Display
messagesOn-board computer and displays

Disp
laymessa ges Poss
iblecauses/c onseq uences and M Solu
tions X
Vis itaqualif iedspecialist wor kshop immediat ely. G
WAR
NING If
th e45 indic ato rlamp remains offeven afterperf ormingtheabove correctivest eps, do
no th ave any childre n12years oldand under andother smallindividuals usethefron t-passenger
seat until thesystem hasbeen repaired. Display
messages Possible
causes/consequences andM Solutions
Front
Passeng er Airbag
Disabl' d See
Operato r's Manual The
front-passenger airbag isdeactivat edduring thejourn eyeven
though anadult oraperson largerthanacert ainsize isoccupying
the fron t-passenger seat.Ifadditional forcesare applied tothe
seat, thesystem mayinterpret theoccupant 'sweight aslower
than itactually is.
X Pull over andstop thevehicle safelyassoon aspossible, paying
atten tiontoroad andtrafficcon ditions .
X En gage theparking brake.
X Switc hoff the ignition .
X Have theoccupant getout ofthe vehicle.
X Keep theseat unocc upied, closethefron t-passenger doorand
switch onthe ignition .
Observe the45(Y page44)indicat orlamp andthe
multifunc tiondisplay andchec kthe following:
Seat unoccupied andignition switched on:
R the 45 indicatorlampmust lightupand remain lit.When
the indicator lampison, OCS (Ypage 44)has deactivated the
front -passenger airbag.
R the Front
Passenger AirbagEnabled SeeOperator's Manual or Front
Passenger AirbagDisabled See Operator's
Manual displa
ymessages mustnotappea rint he
multifunction display.Wait foraperiod ofat least 60seconds
until thenecessary systemcheckshave been completed andto
make surethatthedispla ymessages donot appea rint he
multifunction display.
If these condition sare fulfilled ,the front -passenger seatcanbe
occupied again.Whether the45 indicatorlampremains lit
or goes outdepends onhow OCS classifies theoccupant.
If the condition sare not fulfilled ,the system isnot operating
correct ly.
X Visit aqual ified specialist workshop immediately. Display
messages
249On-board computer and displays Z

Disp
laymessa ges Poss
iblecauses/c onseq uences and M Solu
tions Pho
neNoSer vice Your
vehicleis out side thene twork provider'strans mitter/
rec eiverran ge.
X Wait untilth emob ilepho neoper ationalread iness sym bol
appea rsinthemult ifunction disp lay. ¥
Che
ckWasher Fluid The
wash erflui dlev elin thew asher fluidreservoir has dropped
below themin imum .
X Ad dwashe rfluid (Y page 315). Sma
rtKey Displa
ymessag es Possibl
ecaus es/conseq uencesandM Solut
ions +
Key
DoesNot Bel
ong toVehicle You
have putthewron gSm artKey intheign itio nlock.
X Use thecorrec tSmart Key. +
Take Your Key from
Ignition The
Smart Keyisin the ignition lock.
X Remove theSmart Key. +
Obtain
aNew Key The
Smart Keyneeds tobe replaced.
X Visit aquali fiedspecialist workshop. +
Replace Key Battery The
batteries ofthe KEYLE SS-GO key aredischarged.
X Change thebatteries (Ypage 75). +
Don't
Forget Your Key The
display message isshown foramaximum of60 seconds and
is only areminder.
You have opened thedriver's doorwiththeengine switched off.
The KEYLE SS-GO key isnot inthe ignition lock.
X Remember totake theKEYLE SS-GO key with youwhen you
leave thevehicle. Display
messages
267On-board computer and displays Z

Disp
laymessa ges Poss
iblecauses/c onseq uences and M Solu
tions +
Key
NotDetected (re
ddisp laymes sage ) The
KEYLE SS-GO keyis no tin theveh icle.
Aw arning tone also soun ds.
If th een gin eis swit ched off,you can nolonger lockthe vehicle
cent rally orstart theengine.
X Pull over andstop thevehicle safelyassoon aspossible, paying
attent iontoroad andtraffic condition s.
X Apply theelectric parking brake.
X Locate theKEYLE SS-GO key. The
KEYLE SS-GO key isnot detect edwhile theengine isrunning
because thereisinterfer encefromastron gsource ofradio waves.
Aw arning tone also soun ds.
X Pull overand stop thevehiclesa fel yas soo naspossible ,pay ing
attent iontoroad andtraffic conditions.
X Engage theelectric parking brake.
X Operate thevehicle withtheSmartKey inthe ignition lock. +
Key
NotDetected (White
display
message) The
KEYLES S-GOkeycannot bedetected atpresent.
X Change thelocation ofthe key with theKEYLES S-GOfunction s
in the vehicle.
If the KEYLES S-GOkeyisstill notdetected:
X Operate thevehicle withtheSmartKey inthe ignition lock. +
Key
Detected in Vehicle The
KEYLES S-GOkeyhas been detected insidethevehicle during
locking.
X Remove theKEYLES S-GOkeyfrom thevehicle. +
Remove
'Start' Button
andInsert Key KEYLES
S-GOistemporarily malfunctioning orisdefective. A
warning tonealsosounds.
X Insert theSmartKey intotheignition lockandturn itto the
desired position.
X Visit aqual ified speciali stworkshop. +
Close
Doorsto Lock
Vehicle At
least onedoor isopen. Awarning tone also soun ds.
X Close alldoor sand lockthe vehicle again. 268
Display
messagesOn-board computer and displays

G
WARNING In
the event amalfu nction ofthe SRS isindica tedasoutli nedabove,the SRS may notbe
opera tional.
For yoursafet y,we stron gly recomm endthat you contactana uth oriz edMer cedes-Ben zCent er
immediately tohave thesystem checked.Other wisetheSRS may notbeactivat edwhen needed
in an acciden t,which couldresult inserious orfatal injury, oritmight deploy unexpec tedlyand
unnec essarily whichcouldalsoresult ininjury. Engine
Problem Possible
causes/consequences andM Solutions
;
The
yellow Check
En gine warning lamp
lights upwhile the
engine isrunn ing. There
maybeamalfunct ion,forexample:
R in the engine managemen t
R in the fuel injec tionsystem
R in the exhaust system
R in the ignition system(forvehicles withagasoline engine)
R in the fuel system
The emission limitvalues maybeexceeded andtheengine may
be runn inginemergen cymode.
X Have thevehicle checkedassoon aspossible ataqualified
specialist workshop. i
In
some states,you arerequired bylaw toimmediately visita
qualified specialist workshop assoon asthe yellow Check
En gine warning lamplights up.Ifin doubt, checkwhether such
legal regulations applyinthe state/prov inceinwhich youare
current lydriving. Vehicles
withadiesel engine: thefuel tank hasbeen rundry
(Y page 152).
X Start theengine threetofour times afterrefueling.
If the yellow Check Enginewarning lampgoesout,emergency
running modeiscanceled. Thevehicle neednotbecheck ed. 8
The
yellow reserve fuel
warning lampflashes
while thevehicle isin
motion. Inaddition, the
yell ow Check Engine
warning lamp;
may light up. The
fuel system pressure istoo low. Thefuel filler capisnot closed
correct lyor the fuel system isleaking.
X Observe theadditional displaymessages inthe multifunction
displa y.
X Check thatthefuel filler capiscorrect lyclosed.
X Ifthe fuel filler capisnot correctly closed:close thefuel filler
cap.
X Ifthe fuel filler capisclose d:visit aqual ified specialist
workshop. 276
War
ning andindicator lampsin the instrum entclusterOn-board computer and displays

X
Turn theSmart Keytoposition 2in the
ignition lock.
X To switch oncooli ngfunction: press
switch =repeatedly untiltheblue
indicator lampinthe switch lightsup.
X To switch onwarm ingfunction: press
switch =repeatedly untilthered indicator
lamp inthe switch lightsup.
X To switch offfunction: pressswitch =
repeatedly untiltheindicator lampinthe
switch goesout.
When usingthewarming functionabove a
cert aintemperat ure,residual heatindicator
lamp ;lights up.This means thatthemetal
insert ofthe cup holder ishot.
Cup holder inthe rear seat armrest !
Donot siton orsupport yourbody weight
on the rear seat armrest whenitis folded
down, asyou could otherwise damageit. X
Fold down therear seat armrest .
Cup holder :isin the rear seat armrest . Sun
visors
Overview ofsun visors G
WARNIN
G Do
not use thevanity mirror whiledriving.
Keep thevanity mirrors inthe sun visors
closed whilethevehicle isin motion .
Reflected glarecanendanger youand others. :
Mirror light
; Brack et
= Retaining clip,e.g.foracar park ticket
? Vanity mirror
A Mirror cover
Vanit ymirr orinthe sun visor Mirror
light:only funct ionsifthe sun visor
is clipped intoretainer ;and mirror cover
A has been folded up.
Glare fromtheside X
Fold down sunvisor :.
X Pull sunvisor :out ofretainer =.
X Swing sunvisor :tothe side.
X Slide sunvisor :forwards andback as
required.
X Fold down additional sunvisor ;. Featur
es
295Stowing and features Z