Display messages Possible causes/consequences and
0050
0050 Solutions 003F The battery is no
tbein gcharged. Awarnin gton ea lso sounds.
Possibl ecauses are:
R af ault yalternator
R at ornp oly-V-belt
R am alfunction in th eelectronics
X Pull ove rand stop th evehicl esafely, payin gattention to
roa dand traffic condition sand leav ethe engin erunning.
X Ope nthe bonnet.
X Chec kwhether th epoly-V-belt is torn.
If th epoly-V-belt is torn:
! do no tcontinu edriving. The engin ecould otherwise over-
heat.
X Switc hoffthee ngine.
X Consult aqualified specialist workshop.
If th epoly-V-belt is OK:
X Visit aqualified specialist workshop. 0026 Check
brake wear The brak
epads/lining shaver eached their wear limit.
X Visit aqualified specialist workshop. 004D Check
brake
fluid
level
G
Risk of accident
There is insufficien tbrak efluidint hebrak efluidr eservoir .In
addition ,the 004D indicato rlamp in th einstrument cluster
lights up and awarnin gtones ounds.
X Pull ove rand stop th evehicl esafely as soo naspossible,
payin gattention to roa dand traffic conditions. Do no tcon-
tinue drivin gunder any circumstances.
X Consult aqualified specialist workshop.
Do no ttop up th ebrak efluid. This will no trectify th efault. 004D Release
parking
brake You are drivin
gwitht he parkin gbrak eapplied. Awarnin gtone
also sounds.
X Releas ethe parkin gbrake. Display
messages
219Practical advice
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Display messages Possible causes/consequences and
0050
0050Solutions 004D EBD
,A BS
and ESP
inopera‐
tiv eS ee
Owner's
Manual G
Risk of accident
EB V( electronic brak eforce distribution), ABS, ESP ®
,B AS,
PRE-SAFE ®
,t he HOLD function ,hill start assist and ESP ®
trailer stabilisation are no tavailable due to amalfunction .In
addition ,the 00C6 ,00C7 and0031 warnin glamp sint he
instrumen tcluster ligh tupandaw arnin gtones ounds.
The brak esystem continues to function normally, but without
th ef unction slisted above. ATTENTION ASSIST is deactivated.
X Drive on carefully.
X Visit aqualified specialist workshop immediately. 004D Brake
immedi‐
ately Am
alfunction has occurred while th eHOLDf unction or DIS-
TRONIC PLUS* is active.
or
Vehicles wit hmanual transmission: wit hthe HOLD function
activated, you hav eeither:
R opened th edriver's doo rand release dthe seat belt or
R switched of fthe engin eor
R opened th ebonnet
At onem ay also soun datregular intervals. The tone becomes
loude rifyou attemp ttolockt he vehicle.
You canno tstart th eengine.
X Payin gattention to th etraffic situation ,immediately
depress th ebrak epedal firmly and hold until th edisplay
message disappears.
X Preven tthe vehicl efromr ollin gaway before you leav eit
( Ypage 100).
You can restar tthe engine. 00AE Coolant
Sto
pv ehi‐
cle
Switch
engine off The coolan
tistoohot .Ina ddition ,the 00AE warnin glamp in
th ei nstrument cluster lights up and awarnin gtones ounds.
X Pull ove rand stop th evehicl esafely and switch of fthe
engine, payin gattention to roa dand traffic conditions.
X Mak esuret hatthe air supply to th eradiato risnotblocked,
e.g. by snow, slus horice.
X Wait until th edisplay message disappear sbefore restarting
th ee ngine. Otherwise ,the re is ariskofe ngined amage.
X Pay attention to th ecoolan ttem perature display.
X If th ecoolan ttem perature increase sagain ,visit aqualified
specialist workshop immediately. 220
Display
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Display messages Possible causes/consequences and
0050
0050Solutions 0055 Lef
tc or‐
nering
light
or
Right cor‐
nering
light The left- or right-hand cornering lamp
*isfaulty.
X Visit aqualified specialist workshop. 0055 Left
dipped
beam
or
Right
dipped
beam The left- or right-hand dipped-beam headlamp is faulty.
X
Halogen headlamp: replacethe bulb ( Ypage 260).
X Bi-xenon headlamp*: consultaqualified specialist work-
shop. 0055 Active
Light Sys‐
tem inop‐
erative
The active ligh
tfunction *isfaulty.
X Visit aqualified specialist workshop. 0055 Trailer
lef
ti ndi‐
cator
or
Trailer
right
indic. The left- or right-hand trailer tur
nsignal lamp is faulty.
X Replac ethe bulb. 0055 Trailer
brake lamp The trailer brak
elamp is faulty.
X Replac ethe bulb. 0055 Trailer
lef
tt ail
lamp
or
Trailer
right
tai ll amp The left- or right-hand trailer tai
llamp is faulty.
X Replac ethe bulb. 0055 AUTO
lights
inopera‐
tive The ligh
tsensor is faulty.
X Visit aqualified specialist workshop. 222
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messagesPractical advice
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Display messages Possible causes/consequences and
0050
0050 Solutions 0055 Rea
rl eft
indicator
or
Rear
right
indicator The rear left-han
dorrear right-hand tur nsignal is faulty.
X Visit aqualified specialist workshop. 0055 Lef
tm ir‐
ror indi‐
cator
or
Right mir‐
ror indi‐
cator The tur
nsignal in th eleft-han dand/o rright-hand exterior
mirror is faulty. The display message will only appea rifall
LEDs hav efailed.
X Visit aqualified specialist workshop. 0055 Front
lef
ti ndi‐
cator
or
Front
right
indicator The fron
tleft-han dorfrontright-hand tur nsignal is faulty.
X Replac ethe bulb (Y page 260). 0055 Third
brake lamp The third brak
elamp is faulty. The display message will only
appea rifall LEDs hav efailed.
X Visit aqualified specialist workshop. 0055 Left-hand
tai
ll amp/
brake lamp
or
Right-
han dt ail
lamp/
brake lamp The left- or right-hand tai
llamp/brak elamp is faulty. The dis-
play message will only be shown if several LEDs hav efailed.
X Visit aqualified specialist workshop. 0055 Lef
tm ain
beam
or
Right
mai nb eam The left- or right-hand high beam is faulty.
X
Halogen headlamp: replacethe bulb ( Ypage 260).
X Bi-xenon headlamp*: consultaqualified specialist work-
shop. 0055 Intell.
Light Sys‐
tem inop‐
erative
The Intelligent Light System* is faulty. The lights remain avail-
able without th
eIntel ligent Light System*.
X Visit aqualified specialist workshop. Display
messages
223Practical advice
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Display messages Possible causes/consequences and
0050
0050 Solutions 0055 Switch
off lights The lights are still switched on when you leav
ethe vehicle. A
warnin gtonea lso sounds.
Coupé:
X Tur nthe ligh tswitch to 0027or0066.
or
X If th erear foglam pisswitched on :press th eligh tswitch in
to th estop.
Cabriolet:
X Tur nthe ligh tswitch to 0066. 0055 Malfunc‐
tio
nS ee
Owner's
Manual The exterio
rlighting is faulty.
X Visit aqualified specialist workshop. Vehicles wit
htrailer to whitch*: afusem ay hav eblown.
X Chec kthe fuses (Y page 281).
X If necessary, replac ethe blown fuse. Observ ethe warning
notes.
If th edisplay message continues to be displayed:
X Visit aqualified specialist workshop. 00A0 Replace
air
cleaner
The engin
eair filte risdirty and mus tbereplaced. 41
X Visit aqualified specialist workshop. 00B4 Check
eng
.o il
lev .w hen
nex tr efu‐
elling The engin
eoil level has dropped to acriticallevel. Awarning
tone also sounds.
X Chec kthe engin eoil level ( Ypage 182).
X If necessary, to puptheengin eoil.
X Hav ethe engin echecked forl eak sift heengin eoil needs
toppin gupm oreo ften than usual. 0039 Change
key bat‐
teries The ke
ybatterie sare discharged.
X Change th ebatterie s(Ypage 259). 41
Only fo rcertai nvehicles. Display
messages
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Display messages Possible causes/consequences and
0050
0050 Solutions 0039 Key does
not
belong to
vehicle You hav
eput th ewrong ke yint he ignition lock.
X Use th ecorrect key. 0039 Close
doors to
loc
kv ehi‐
cle At leas
tone doo riso pen.Aw arnin gtonea lso sounds.
X Clos eall doors and loc kthe vehicl eagain. 0039 Remove
starting
button,
then
insert key
KEYLESS-GO
*ist emporarily malfunctioning or is defective. A
warning tone also sounds.
X Remove the Start/Stop button from the ignition lock*
(Y page 66).
X Insert the key into the ignition lock and turn it to the desired
position. 006F Front
left seat
backrest
not locked
or
Front
right
seat back‐
rest not
locked The seat backrest is not engaged.
Awarning tone also sounds.
X Push the backrest back until it engages. 006F Rear left
seat back‐
rest not
locked
or
Rear
right
seat back‐
rest not
locked
G
Risk of injury
The backrest in the rear is not engaged on the left-hand and/
or right-hand side. Awarning tone also sounds.
X Push the backrest back until it engages (Y page 169).0081 Restraint
sys. mal‐
function
Consult
workshop
G
Risk of injury
There is amalfunction in the SRS (Supplemental Restraint
System). The 0081warning lamp also lights up in the instru-
ment cluster.
X Visit aqualified specialist workshop. Display messages
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Display messages Possible causes/consequences and
0050
0050Solutions 0081 Front
lef
tm al‐
function
Consult
workshop
or
Front
right mal‐
function
Consult
workshop G
Risk of injury
SRS has malfunctioned at th efront on th eleftorr ight.The
0081 warnin glamp also lights up in th einstrument cluster.
X Visit aqualified specialist workshop. 0081 Rea
rl eft
malfunc‐
tio nC on‐
sul tw ork‐
shop
or
Rear
right mal‐
function
Consult
workshop G
Risk of injury
SRS has malfunctioned in th erear *ont heleftorr ight.The
0081 warnin glamp also lights up in th einstrument cluster.
X Visit aqualified specialist workshop. 0081 Left
windowbag
malfunc‐
tio
nC on‐
sul tw ork‐
shop
or
Right
windowbag
malfunc‐
tio nC on‐
sul tw ork‐
shop G
Risk of injury
There is amalfunction in th eleft-han dand/o rright-hand
windowbag. The 0081warnin glamp also lights up in the
instrumen tcluster.
X Visit aqualified specialist workshop. 00AA There is only
asma ll amount of fue linthefuel tank.
X Refuel at th eneares tfillin gstation. 00B8 Reserve
fue
ll evel The fuel level has fallen belo
wthe reserv erange.
X Refuel at th eneares tfillin gstation. 228
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Troubleshooting
Points to remember
G
Ris
kofa ccident and injury
If work relevant to safety is carrie doutincorrectly ,thisc ould impai rthe operating safety of your
vehicle. Yo ucould lose contro lofthe vehicl eand cause an accident. In addition, the safety
system smayno longe rbeabletop rotect yo uorothers as the yaredesigne dtodo.
Alway shavem aintenance work carrie doutataq uali fied specialis tworkshop .The workshop must
have the necessary specialis tknowledg eand tool stocarry ou tthe work required .Mercedes-
Benz recommends tha tyou useaM ercedes-Benz Service Centre for thi spurpose. In particular,
work relevant to safety or on safety-relate dsystem smustbec arriedoutataq uali fied specialist
workshop. Warning and indicator lamps in switche
sand buttons Problem Possible causes/consequence
sand 0050
0050Solutions The sea
tventilation*
ha ss witched off pre-
maturel yorcannotbe
switched on. The on-board voltag
eistoo low, because too many consumers are
switched on.
X Switch off consumers tha tare not required ,e.g.r ea rw indow
heating or interio rlighting. The sea
theating* has
switched off prema-
turel yorc annotbe
switched on. The on-board voltag
eistoo low, because too many consumers are
switched on.
X Switch off consumers tha tare not required ,e.g.r ea rw indow
heating or interio rlighting. The warnin
glam pon
the sport button of the
dynamic handling pack-
ag ew iths ports mode*
is lit. If yo
uselect comfort mod eand the indicator lamp does not go out,
the dynamic handling packag ewiths ports mode* is faulty.
X Visi taq ualified specialis tworkshop. When yo
upress the
005C button on the
contro lpan el for
Thermatic 2-zone auto-
matic climate control/
Thermotroni clux ury3-
zone automatic climate
control* ,the indicator
lamp in the button
flashe sthre etime sor
remains off .The cool-
ing system canno tbe
switched on. Cooling ha
sbeend eactivated du etoamalfunction.
X Visi taq ualified specialis tworkshop. 230
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