2012 MERCEDES-BENZ M-Class bulb

If
the new bulbstill does notlightup,con sult
a qualified specialist workshop.
Bulbs andlamps areanimport antaspect of
vehicle safety.Youmust therefore make sure
that these function correctlyat all times .
Have theheadlamp settingchec kedregularly. G
WARN
ING Bulbs
andlamps canbevery hot.Youshould
ther efore allowthemtocool down before you
chang ethem .Othe rwise, yo ucou ldbe burned
if yo utou chthe m.
Kee pbu lbsou to fthe reach ofchildren.
Otherwise, theycould damage thebulbs, for
example, andinjure themselves.
Never useabulb which hasbeen dropped.
Such abulb maybreak oreven explode and
injure you.
Halogen bulbsarepressurized andcan
explode whenyouchange them,particularly
if they arevery hot.Youshould therefore wear
eye protect ionand gloves whenyouare
changing them. Overview:
changingbulbs/bulb types
You canchange thefollowing bulbs.Thebulb
type canbefound inthe legend. Halogen
headlamps
: Low-beam headlamp:H755W
; High-beam headlamp:H755W
= Parking lamp/standing lamp:W5W BV
? Side marker lamp:WY5W Tail
lamp
: Brake lamp:P21 W-L Changing
thefront bulbs
Removing andinstalling thecover inthe
front wheel arch You
must remove thecover fromthefront
wheel housing beforeyoucan change the
front bulbs. X
To remove: switchoffthe lights.
X Turn thefront wheels inwards.
X Slide upcover :and liftitout.
X To install: insertcover:again andslide
it downwards untilitengages. Replacing
bulbs
115Lights and windshield wipers Z

Low-bea
mheadlam ps(ha logen
hea dlamp s) X
Remov eth ecov erinthefron twheel arch
(Y page 115).
X Turn housin gcov er: coun ter-clo ckwise
and pullitout.
X Turn bulbholde r; coun ter-clo ckwise and
pull itout .
X Take thebulb outofbulb holde r;.
X Inser tthe new bulb intobulb holder ;.
X Insert bulbholder ;into thelamp andturn
it clockwise.
X Align housing cover:and turn it
clockwise untilitengages.
X Repla cethe cover inthe front wheel arch
(Y page 115).
High-beam headlamps(halogen
headlam ps) X
Switch offthe lights.
X Open thehood. X
Turn housing cover:counter- clockwise
and pullitout.
X Pull lever =upwa rdsand remove bulb
holder ;.
X Take thebulb outofbulb holder ;.
X Insert thenew bulb intobulb holder ;.
X Simultaneously pressbulbholder ;and
pull lever =downwards.
X Align housing cover:and turn it
clockwise untilitengages.
Parking lamps/sta ndinglamps
(halogen headlamps) X
Turn housing cover:counter- clockwise
and pullitout.
X Pull outbulb holder ;.
X Take thebulb outofbulb holder ;.
X Insert thenew bulb intobulb holder ;.
X Insert bulbholder ;.
X Align housing cover:and turn it
clockwise untilitengages. 116
Replacing
bulbsLights and windshield wipers

Side
markerlamp s X
Remove thecover inthe front wheel arch
(Y page 115).
X Turn cap;counter -clockwiseandremove
it.
X Pull outbulb holder :.
X Take thebulb outofbulb holder :.
X Insert thenew bulb intobulb holder :.
X Insert bulbholder :.
X Align cap;and turn itclockwise.
X Inst allthe cover inthe front wheel arch
(Y page 115). Changing
therear bulbs
Opening andclosi ngthe service flap You
must opentheservice flapinthe cargo
compartmen tbefore youcan change the
bulbs inthe taillamps. Left-
hand service flap Right-hand
serviceflap
X To open: release serviceflap:atthe top,
e.g. with ascrewdriver, andswing it
downward inthe direction ofthe arrow.
X Right side:remove thefirst- aidkit
beforehand andpulltheparcel netdown.
X To close :reinsert serviceflap:.
Bra kelamp X
Switch offthe lights.
X Open thecargo compartmen t.
X Open theservice flap(Ypage 117). :
Brake lamp
X Turn thebulb holder counter -clockwiseand
remove it.
X Remove thebulb from thebulb holder.
X Insert thenew bulb intothebulb holder.
X Insert thebulb holder andturn itclockwise.
X Close theservice flap(Ypage 117). Replacing
bulbs
117Lights and windshieldwipers 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