2012 MERCEDES-BENZ M-Class brake light

Disp
laymessa ges Poss
iblecauses/c onseq uences and M Solu
tions ÷
Ino
perative See Ope
rator'sMan ual G
Ri
sk ofacci dent ES
P®
,BA S,PRE -SAF E®
,th eHO LD function ,hill start assi stand
ES P®
trailer stabiliz ation are unav ailable duetoamalf unction .
BA SPLU Sand PRE-SAF E®
Br ake may alsohavefail ed.
In addit ion,th e÷ andå warning lamp sligh tupin the
inst rument cluster.
ATTE NTION ASSIS Tis deactiv ated.
The brake system continues tofunc tion norm ally,butwithout the
func tionslisted above.
X Driv eon carefully.
X Visit aqualified specialist workshop. T!
÷
Inoper
ative See Operat
or'sManual G
Risk
ofaccident EB
D(elect ronic brake forcedistr ibution), ABS,ES P®
,BA S,PRE-
SA FE®
,the HOLD function,hill start assist andESP®
trailer
stabilizat ionare unavailable duetoamalfunc tion.
BA SPLUS andPRE-S AFE®
Brak emay alsohave failed.
In addition, the÷, åand! warning lampslightupin
the instrument clusterandawarning tonesounds.
ATTE NTION ASSIS Tis deactiv ated.
The brake system continues tofunc tion norm ally,butwithout the
func tionslisted above. Thewheels couldtherefore lockifyou
brake hard,forexample.
X Driv eon carefully.
X Visit aqualified specialist workshopimmediately. #
Check
Brake Pad Wear The
brake pads/linin gshave reached theirwear limit.
X Visit aqualified specialist workshop. F(USA
only)!
(Canada
only) Please
Release Parkin
gBrake The
redF (USAonly)/ !(Canada only)indicat orlamp
flashes andawarning tonesounds. Acondition forautomatic
release ofthe electric parking brakeisnot fulfilled (Ypage 156).
You aredriving withtheelectric parking brakeapplied .
X Release theelectric parking brakemanually . The
redF (USAonly)/ !(Canada only)indicator lamp
flashes andawarning tonesounds.
You aremaking anemergenc ystop using theelectric parking
brake (Ypage 156). Display
messages
241On-board computer and displays Z

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 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

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 Lan
eKee ping Ass
ist Ino
perative or Act
ive Lane Kee
pingAss ist Ino
perative Lan
eKee pingAs sis torA ctive Lane Keeping Assi stisdef ectiv e.
X Vis itaqu alifi ed spe cialist wo rksho p. Blin
dSpot Assist Curr
ently Unav
ailableSee Oper
ator'sManu al or Acti
veBlin d Spot
Assist Curr
ently Unav
ailableSee Oper
ator'sManu al Bli
nd Spot Assistor Active Blind Spot Assististemp orarily
inop erative .Possible causesare:
R you have established theelectric alconn ection between the
trailer andyour vehicle.
R the sensors aredirty.
R funct ionisimpaired duetoheavy rainorsnow.
R the radar sensor system isoutside theoperating temperature
range.
R the radar sensor system istemporarily inoperative, e.g.due to
electrom agneticradiation emittedbynearby TVorradio
station sor other sources ofelectrom agneticradiation.
The yellow 9indicator lampsalsolight upinthe exter ior
mirrors.
X When towing atrailer, confirmthedisplay message witha.
If you aredriving without atrailer andthedisplay message does
not disappea r:
X Pull over andstop thevehicle safelyassoon aspossible, paying
atten tiontoroad andtraffic conditions.
X Apply theelectric parking brake.
X Clean thesensors (Ypage 322).
X Restart theengine.
If the system detectsthat thesensors arefully operational, the
display message disappears.
Blind SpotAssist orAct ive Blind SpotAssist isoperational again. Blind
SpotAssist Inoperative
or Active
Blind Spot
Assist Inoperative Blind
SpotAssist orAct ive Blind SpotAssist isdefectiv e.
The yellow 9indicator lampsalsolight upinthe exter ior
mirrors.
X Visit aquali fiedspecialist workshop. Park
Assist Canceled The
driver's doorisopen andthedriver's seatbelthasnotbeen
fasten ed.
X Repeat theparking process withtheseat beltfastened andthe
driver's doorclosed. 260
Display
messagesOn-board computer and displays