2012 MERCEDES-BENZ M-Class Owner's Manual

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. Display
messages
247On-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

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

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