2012 MERCEDES-BENZ M-Class low

Disp
laymessa ges Gen
eral not es G
WAR
NING Al
lcat ego riesof mes sagescontain imp ortant info rm ation whic hsho uld betake nn ote ofand,
where amalfunct ionisindicated, addressed assoon aspossible atan authorized Mercedes-B enz
Center.
Failure torepair thecondit ionnoted maycause damage notcovered bythe Mercedes-B enz
Limited Warranty, orresult inproperty damageorpersonal injury.
Display messages appearinthe multifunct iondisplay .
Display messages withgraphic displaysmay beshown insimplified forminthe Operator's
Manual andmay differ fromthemessages showninthe multifunct iondisplay .
Please respond inaccordanc ewith thedisplay messages andfollow theadditional notesin
this Operator's Manual.
Certain displaymessages areaccompanied byan audib lewarning toneor acont inuous tone.
When youstop andpark thevehicle, pleaseobserve thenoteson the HOLD function
(Y page 179)andparking (Ypage 155). Hiding
display messages
You canhide some display messages withalow priority.
X Press thea or% button onthe steering wheeltohide thedisplay message.
The display message iscleared.
Display messages withahigh priority areshown inred.
You cann othide display messages ofthe highest priority. Themultifunct iondisplay shows
these messages continuously untilthecauses forthe messages havebeen remedied. Message
memory
The on-board computer savescertaindisplay messages. Youcancallupthe display messages
in the message memory.
X Press the= or; button onthe steering wheeltoselect the Serv. menu.
If there aredisplay messages, themultifunct iondisplay shows,forexample, 2
Messages .
X Press the9 or: button toselect theentr y,e.g. 2
Messages .
X Confirm witha.
X Press the9 or: button toscroll through thedisplay messages.
When theignition isswitched off,alldisplay messages aredeleted apartfromsome high-
priority displaymessages. Oncethecauses ofthe high-priority displaymessages havebeen
rect ified, thecorrespon dingdisplay messages arealso deleted. 238
Display
messagesOn-board computer and displays

Disp
laymessa ges Poss
iblecauses/c onseq uences and M Solu
tions F(U
SA
on ly)!(Can ada
on ly) Par
kingBra keSee Ope
rator'sMan ual The
yello w! warning lamp lightsup.
The electric park ing brak eis malf unction ing.
To apply:
X Swi tchof fth eign ition .
X Pre sstheelec tric park ingb rake handl efor atlea st10 seconds.
X Shift thetransmissi ontoP.
X Consu ltaqua lified speci alist workshop . The
yellow ! warning lampandthered F (USA
only )/! (Canada only)indica torlamp light up.
The electric parking brakeismalfu nctioning.
To rele ase:
X Switch offthe ignitio nand turn itback on.
X Rel ease theelectric parking brakemanua lly.
or
X Rel ease theelectric parking brakeautomatical ly(Y pag e156).
If the yellow ! warning lampremai nslitor continues toflas h:
X Do not drive on.
X Consu ltaqua lified speci alist workshop . The
redF (USAonly)/! (Canada only)indica torlamp
flas hes and theyellow ! warning lamplights up.
The electric parking brakeismalfu nctioning.
To rele ase:
X Switch offthe ignitio nand turn itback on.
X Rel ease theelectric parking brakemanua lly.
To apply:
X Switch offthe ignitio nand turn itback on.
X Apply theelectric parking brakemanua lly.
If the red
F (USA
only)/
! (Ca
nada only)indica torlamp
continues toflas h:
X Do not drive on.
X Secure thevehicl eaga inst rolling away (Ypag e334).
X Shift thetransmissi ontoP.
X Turn thefront wheelstoward sthe curb.
X Consu ltaqua lified speci alist workshop . 242
Di
splay messag esOn-board computer and displays

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 G
Tel
eAid Ino
perative US
Ao nly:one ormor eof the mainfunctio nsinthe mbr ace system
ar ema lfunctio ning.
Ca nad aonl y:one ormor eof the mainfunctio nsofthe TELEAI D
sy stem arema lfunctio ning.
X USA only:ha ve the mbr ace system checked ataq ualifi ed
spec ialist workshop.
X Canad aon ly: have theTE LE AIDs ystem checke dat aqualif ied
spe cialist wor kshop . PRE
-SAFE Ino
perative See Ope
rator'sMan ual G
Ri
sk ofinjury Im
por tant fun ction sofPRE-SAFE ®
have failed .Alloth erocc upant
safet ysyst ems, e.g.airbags, remain available.
X Visit aqualified specialist workshop immed iately. PRE-
SAFE Func
tion Curr
ently Limi
tedSee Oper. Manu
al G
Risk
ofacciden t PRE-
SAFE®
Br ake istem porar ilyinope rative if:
R the DISTRON ICPLUS coverinthe radiat orgrill isdirt y.
R the sensors inthe bumper sare dirty.
R its func tion isimpaired duetoheavy rainorsno w.
R the radar sensor syst emistem porar ilyinope rative, e.g. due to
elect romagnet icradiat ionemit tedbynear byTV orradio
st ation sor oth ersourc esofelect romagnet icradiat ion.
R the syst emisouts idethe operat ingtem perat urerang e.
R the on-board voltage istoo low.
PRE- SAFE®
Br ake isoperat ionalagain andthedisplay message
disappears if:
R the dirt (e.g.slush) drops awaywhile thevehic leisin mot ion.
R the syst emdete ctsthat thesensors arefully available again.
R the syst emiswithin theoperat ingtem perat urerang e.
If the display messagecontinues tobe displayed:
X Clean theDISTRON ICPLUS coverinthe radiat orgrill
(Y page 322).
X Clean thebumper s(Y page 322).
X Restar tthe engine.
X Wait untilthebattery issufficiently charged. Display
messages
245On-board computer and displays Z

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

G
WARNING If
the 45 indicatorlamp remai nslitwith anadu ltoccupa nton the front-passenge rseat
even afterperform ingthe above corrective steps, donot have anypassenger usethefron t-
passenger seatuntil thesystem hasbeen repaired. Lights
i
Display
messages aboutLEDs:
This display message willonly appear ifall LED shave failed. Display
messages Possible
causes/consequences andM Solutions
b
Check
Left Corneri
ng Light or Check
Right
Corneri ng Light The
leftorright- hand cornering lightisdefect ive.
X Check whether youarepermitt edtochange thebulb yourself
(Y page 114).
or
X Visit aqualified specialist workshop. b
Check
LeftLow Beam or Check Right
Low
Beam The
leftorright- hand low-beam headlamp isdefect ive.
X Check whether youarepermitt edtochange thebulb yourself
(Y page 114).
or
X Visit aqualified specialist workshop. b
Check Trailer Left
Tail
Lamp or Check
Trailer Right Tail
Lamp The
leftorright- hand trailer taillamp isfaulty.
X Check whether youarepermitt edtochange thebulb yourself.
or
X Visit aqualified specialist workshop. b
Check Trailer Left
Turn
Signal or Check
Trailer Right Turn
Signal The
leftorright- hand trailer turnsignal lampisdefect ive.
X Check whether youarepermitt edtochange thebulb yourself.
or
X Visit aqualified specialist workshop. b
Check
Trailer Brake
Lamp The
trailer brakelampisdefect ive.
X Check whether youarepermitt edtochange thebulb yourself.
or
X Visit aqualified specialist workshop. 250
Display
messagesOn-board computer and displays

Engine
Displ
aymes sage s Possib
lecau ses/cons equences andM Solu
tions +
Che
ckCoolant Lev
elSee Ope
rator'sMan ual The
coolant levelis toolow.
X Add coolant ,obse rving thewarn ingnoteswhen doingso
(Y page 315).
X Ifcoo lant needs tobe added moreoft en than usual, havethe
en gin ecoo lant systemcheck edataqualifie dspec ialist
work shop. G
WAR
NING Do
notspill antif reeze onhot engin eparts. Antifr eeze contains ethylene glycolwhich mayburn
if it comes intocon tact with hotengin eparts. Youcould beseriously burned.
! The coolant levelistoo low. Avoid makin glong journ eyswith toolittlecoolant inthe cooling
system. Theengin ewill other wisebedamaged.
The display messages andthecorr espondin gsymbol thatindicat ethat thecoolant levelis
too low must notbeignored. 254
Display
messagesOn-board computer and displays