2012 MERCEDES-BENZ M-Class workshop

Disp
laymessa ges Poss
iblecauses/c onseq uences and M Solu
tions PRE
-SAFE Fun
ctions Limited See
Operator's Man
ual G
Ri
sk ofacci dent PRE
-SAF E®
Br ake isdef ective. BASPLU Sor thed istanc ewarning
sign almay alsohave failed.
X Visi taqu alified specialist workshop. 6
SRS
Malfun ction Servic
eRequir ed G
Risk
ofinjur y There
isamalfunc tioninthe SRS (Supplemen talRestrain t
Syst em). The6 warning lampalsolights upinthe instrument
cluster .
X Visit aqualified specialist workshop. 6
Front
LeftSRS Malfun
ction Servic
eRequir ed or
Front
Right Malfun
ction Servic
eRequir ed G
Risk
ofinjur y SRS
hasmalfunc tionedatthe fron ton the left orright .The 6
warning lampalsolights upinthe instrument cluster.
X Visit aqualified specialist workshop. 6
Rear
LeftSRS Malfun
ction Servic
eRequir ed or
Rear
Right SRS Malfun
ction Servic
eRequir ed G
Risk
ofinjur y SRS
hasmalfunc tionedatthe rear onthe left orright .The 6
warning lampalsolights upinthe instrument cluster.
X Visit aqualified specialist workshop. 6
Rear
Center SRS Malfun
ction Servic
eRequir ed G
Risk
ofinjur y SRS
hasmalfunc tionedatthe rear center. The 6 warning lamp
also lights upinthe instrument cluster.
X Visit aqualified specialist workshop. 6
Left
SideCurtai n Airbag Malfun
ction Servic
eRequir ed or
Right Side Curtai
n Airbag Malfun
ction Servic
eRequir ed G
Risk
ofinjur y There
isamalfunc tioninthe left- hand and/or right-handwindow
curt ainairbag. The6 warning lampalsolights upinthe
inst rument cluster.
X Visit aqualified specialist workshop. 246
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

Disp
laymessa ges Poss
iblecauses/c onseq uences and M Solu
tions b
Che
ckRearLef t Tur
n Sig
nal or Che
ck Rea
rRig ht Turn Sig
nal The
rear left-han dor rear right-hand turns ignal isdefec tive.
X Check whetheryou areperm itted tochan gethe bulb yourself
(Y page 114).
or
X Visit aqualified specialist workshop. b
Chec
kFron tLeft Turn
Sign
al or Chec
k Fron
tRigh tTurn Sign
al The
frontleft -han dor fro ntright -handtur nsign alisdefec tive.
X Check whetheryou areperm itted tochan gethe bulb yourself
(Y page 114).
or
X Visit aqualified specialist workshop. b
Chec
kLeft Mirror Turn
Sign
al or Chec
k Righ
tMirr orTurn Sign
al The
turnsign alin the left-han dor right -handext erior mirroris
defec tive.
X Check whetheryou areperm itted tochan gethe bulb yourself
(Y page 114).
or
X Visit aqualified specialist workshop. b
Chec
k Cent
er Brak
e Lamp The
high- moun tedbrak elamp isfaulty.
X Check whetheryou areperm itted tochan gethe bulb yourself
(Y page 114).
or
X Visit aqualified specialist workshop. b
Chec
kLeft Tail and
Brake Lamp
s or Chec
k Righ
tTail and Brak
eLamp s The
leftorright -handbrak elamp isdefec tive.
X Check whetheryou areperm itted tochan gethe bulb yourself
(Y page 114).
or
X Visit aqualified specialist workshop. b
Chec
kLeft High Beam or Chec
k Righ
t High
Beam The
leftorright -handhigh beam isdefec tive.
X Check whetheryou areperm itted tochan gethe bulb yourself
(Y page 114).
or
X Visit aqualified specialist workshop. Display
messages
251On-board computer and displays Z

Disp
laymessa ges Poss
iblecauses/c onseq uences and M Solu
tions b
Lic
ensePla teLamp The
licen se plat elamp sare fault y.
X Chec kwhether youarepermitted tochange thebulb yourself
(Y page 114).
or
X Visit aqual ified specialist workshop. b
Rear
FogLamp The
rear foglamp isdefective.
X Check whether youarepermitted tochange thebulb yourself
(Y page 114).
or
X Visit aqual ified specialist workshop. b
Check
FrontLeft Parking
Lamp or Check Front
Right
Parking Lamp The
front leftorfront rightparking orstanding lampisdefective.
X Check whether youarepermitted tochange thebulb yourself
(Y page 114).
or
X Visit aqual ified specialist workshop. b
Backup
Light The
backup lampisdefective.
X Check whether youarepermitted tochange thebulb yourself
(Y page 114).
or
X Visit aqual ified specialist workshop. b
Check
FrontLeft Sidemarker
Lamp or Check Front
Right
Sidemarker Lamp The
leftorright front sidemarker lampisdefective.
X Check whether youarepermitted tochange thebulb yourself
(Y page 114).
or
X Visit aqual ified specialist workshop. b
Check
LeftTail Lamp or Check Right
Tail
Lamp The
leftorright-hand taillamp isdefective.
or
The rear leftorright sidemarker lampisdefective.
X Check whether youarepermitted tochange thebulb yourself
(Y page 114).
or
X Visit aqual ified specialist workshop. 252
Display
messagesOn-board computer and displays

Disp
laymessa ges Poss
iblecauses/c onseq uences and M Solu
tions b
Che
ck Lef
t Day
time Run
ning Lig
ht or Che
ck Rig
htDaytim e Run
ningLig ht The
lefto rright -han ddaytime runninglamp isdefec tive.
X Check whetheryou areperm itted tochan gethe bulb yourself
(Y page 114).
or
X Visit aqualified specialist workshop. b
Acti
veHead lamps Inop
erative The
active light function isdefec tive.
X Visit aqualified specialist workshop. b
Malf
unction See Oper
ator'sManu al The
exterior lightingisdefec tive.
X Visit aqualified specialist workshop. b
AUTO Lamp Func
tion Inop
erative The
light sensor isdefec tive.
X Visit aqualified specialist workshop. b
Swit
chOff Lights The
light sare still switc hedonwhen youleave thevehic le.A
warnin gton ealso soun ds.
X Turn thelight switc hto c orÃ. Adap
tive Highbeam Assi
stInop erative Adapt
iveHighb eamAssistisfaulty.
X Visit aqualified specialist workshop. Adap
tive Highbeam Assi
stCurr ently Unav
ailable See Oper
ator'sManu al Adapt
iveHighb eamAssistisdeact ivatedand temporar ily
inope rative. Possib lecauses are:
R the windsh ieldinthe came ra'sfield ofvision isdirt y.
R visibilit yis impaired duetoheavy rain,snowor fog.
X Clean thewindsh ield.
If the syst emdete ctsthat thecame raisfully functional again, the Adap
tive Highbeam AssistNow Available display
message
is shown .
Adapt iveHighb eamAssistisoperat ionalagain. Display
messages
253On-board computer and displays Z

Disp
laymessa ges Poss
iblecauses/c onseq uences and M Solu
tions ?
Coo
lantLev elLow Sto
pVeh icl eTur n Eng
ine Off The
coolan tistoo hot.
X Pull over andstop thevehicle safelyandswitch offthe engine,
pay ing attent iontoroad andtraffic conditions.
X Make surethattheairsuppl yto the engine radiatorisnot
blocked, e.g.bysnow, slushorice.
X Wait untilthedispla ymessage disappearsbefore restarting the
engine. Otherwise, thereisarisk ofengine damage .
X Pay attent iontothe coolant temperature display.
X Ifthe temperature increasesagain,visit aqual ified speciali st
workshop immediately . The
poly-V-belt mayhave torn.
X Pull over andstop thevehicle safelyandswitch offthe engine,
pay ing attent iontoroad andtraffic conditions.
X Open thehood.
X Check whether thepoly-V-belt istorn.
If the poly-V-belt istorn:
! Donot cont inue driving. Theengine couldotherwise overheat.
X Consult aqual ified speciali stworkshop.
If the poly-V-belt isnot dam aged:
X Wait untilthedispla ymessage disappearsbefore restarting the
engine. Otherwise, thereisarisk ofengine damage .
X Pay attent iontothe coolant temperature display.
X Visit aqual ified speciali stworkshop. G
WARNING Driving
whenyourengine isoverheated cancause somefluidswhich mayhave leaked intothe
engine compartment tocatch fire.Youcould beseriously burned.
Steam fromanoverheated enginecancause serious burnswhich canoccur justbyopening the
engine hood.Stayawayfrom theengine ifyou seeorhear steam coming fromit.
Stop thevehicle inasafe location awayfrom other traffic. Turnoffthe engine, getout ofthe
vehicle anddonot stand nearthevehicle untiltheengine hascooled down.
! Ifthe coolant temperature exceeds248‡(120 †)donot cont inue driving. Theengine will
otherwise bedamage d. Dis
play messages
255On-board computer and displays Z

Disp
laymessa ges Poss
iblecauses/c onseq uences and M Solu
tions ? The
engin efan isdef ective.
X At coolan ttemperatures under248‡(120 †),drive tothe next
qualified specialist workshop.
X Avo idsubjec tingthe engin etoheavy loads, e.g.driving in
mountainous terrain,andstop- and-go traffic. # The
battery isnot being charged.
Possible causesare:
R adefectiv ealternator
R atorn poly-V-belt
R amalfunct ioninthe electron ics
X Pull over andstop thevehicle safelyandswitch offthe engine,
paying attentiontoroad andtraffic conditions.
X Open thehood.
X Check whether thepoly-V-belt istorn .
If the poly-V- beltistorn:
! Donot cont inue driving. Theengine couldotherwise overheat.
X Consult aquali fiedspecialist workshop.
If the poly-V- beltisnot dam aged:
X Visit aquali fiedspecialist workshop. 4
Check
Engine Oil At
Next Refueling The
engine oillevel hasdropped tothe minimum level.
Aw arning tone also soun ds.
X Chec kthe engine oillevel atthe latest whennextrefueling
(Y page 313).
X Ifnecessary, addengine oil(Ypage 314).
X Ifengine oilneeds tobe added moreoften thanusual,have the
engine checkedataqual ified specialist workshop. Inform
ationonapproved engineoilscan beobtained fromanyqual ified specialist workshop
or on the Internet athttp: //www.mbusa.com (USAonly).
! The oillevel istoo low. Avoid longjourneys withtoolittle engine oil.There isarisk of
engine damage.
The displa ymessages andthecorresponding symbolthatindicate thattheoillevel istoo
low must notbeignored. 256
Display
messagesOn-board computer and displays