2015 MERCEDES-BENZ C-CLASS COUPE air condition

Display messages
Possible causes/consequences and
M
MSolutions Front-passenger
Front-passenger
airbag enable
dSee
airbag enable dSee
Owner' sManual
Owner' sManual The front-passenger fron
tairbag and front-passenger kneebag are
enabled during th ejou rney, although:
R ac hild, asmall adult or an objec tweighing less than th esystem
weigh tthreshold is locate donthefront-passenger seat
or
R thef ront-pa ssenger seat is no toccupied
The system may detec tobjects or force stha tare addin gtotheweight
applie dtotheseat.
G WARNING
The airbag may deploy unintentionally.
This poses an increased ris kofinjury.
X Pull ove rand stop th evehicl esafely as soo naspossible, paying
attention to roa dand traffic conditions.
X Safeguar dthe vehicl eagainst rollin gaway (Y page 172).
X Switc hthe ignition off.
X Ope nthe front-passenger door.
X Remove th echild and th echild restrain tsystem from th efront-
passenger seat.
X Mak esuret he re are no objects applyin gadditional force to th eseat.
The system may otherwise detec tthe additional force and interpret
th es eat occupant's weigh tasgreatertha nita ctually is.
X Mak esuret hatthe seat is unoccupied ,close th efront-pa ssenger
door and switch on th eignition.
X Observ ethe PASSENGER AI RBAG indicator lamp sinthecentre
console and th emultifunction display and chec kthe following:
Seat unoccupied and ignition switched on:
R as elf-diagnosis is carrie dout.T he PASSENGER AI RBAG OFFa nd
PASSENGER AI RBAG ON indicator lamp smustligh tups imulta-
neousl yfor approximately six seconds
R theP ASSENG ER AIRBAG OFFindicator lamp mus tthe nligh tup
and remain lit after th eself-diagnosis .Iftheindicator lamp is on,
th ea utomatic front-passenger fron tairbag deactivation system
has disabled th efront-pa ssenger fron tairbag (Y page 48)
R the Front-passenger
Front-passenger airbag airbagenabled
enabled See
SeeOwner's
Owner's Manual
Manual
or Front-passenger
Front-passenger airbag
airbagdisabled
disabled See
SeeOwner's
Owner's Manual
Manual
display message smustn otappear in th emultifunction display
X Wait for aperiod of at least 60 seconds until th eneces sarysystem
checks hav ebeen completed.
X Mak esuret hatthe display message sdonotappear in th emulti-
function display.
If these condition sare met ,the front-passenger seat can be occupied
again .Whether th ePASSENG ER AIRBAG OFForONi ndicator lamp
remain slit or goe sout depend sonhow theautomatic front-passenger
fron tairbag deactivation system classifies th eoccupant.
If th econditi onsa re no tmet,t he system is no toperating correctly.
X Consult aqualified specialist workshop immediately. 264
Display
messagesOn-boardcomputer an ddisplays

Display messages
Possible causes/consequences and
M
MSolutions Further information on th
eautomatic front-passenger fron tairbag
deactivation feature (Y page 47).Lights
Display messages
Possible causes/consequences and
M
MSolutions b
Lef
td ipped beam
Lef td ipped beam
(Example) The correspondin
gbulb is faulty.
X Consult aqualified specialist workshop.
or X Chec kwhether you are permitte dtoreplace th ebulb yourself
(Y page 123).
i LE
Dl igh tbulbs :the display message for th ecorre spondin glamp
only appear swhen all th eLEDsint helamp hav efailed. b
Active Active
Light
LightSystem
System
inoperative
inoperative The active ligh
tfunction is faulty.
X Consult aqualified specialist workshop. b
Intell
.Light Sys‐
Intell .Light Sys‐
tem inoperative tem inoperative The Intelligent Light Syste
misfaulty. The lighting system continues to
function properly without th efunction softheIntelligent Light System.
X Consult aqualified specialist workshop. b
Malfunction Malfunction
See
SeeOwn‐
Own‐
er' sM anual
er' sM anual The exterio
rlighting is faulty.
X Consult aqualified specialist workshop. Vehicles wit
htrailer to whitch :af usem ay hav eblown.
X Pull ove rand stop th evehicl esafely as soo naspossible, paying
attention to roa dand traffic conditions.
X Safeguar dthe vehicl eagainst rollin gaway (Y page 172).
X Chec kthe fuses (Y page 350).
X If necessary, replace th eblown fuse. Observ ethe warning note sas
you do so.
If th edisplay message continues to be displayed:
X Consult aqualified specialist workshop. b
AUT
Ol ights inoper‐
AUT Ol ights inoper‐
ative ative The ligh
tsensor is faulty.
X Consult aqualified specialist workshop. b
Switch off lights Switch off lights You are leaving th
evehicl eand th elights are switched on .Awarning
tone also sounds.
X Turn th eligh tswitch to the Ãposition. Display
messages
265On-boardcomputer an ddisplays Z

Display messages
Possible causes/consequences and
M
MSolutions ?
Coolan
tStopv ehi‐
Coolan tStopv ehi‐
cle Switch engine cle Switch engine
off off The coolan
tistoohot.
Aw arning tone also sounds.
G WARNING
Never drive wit hanoverheate dengine. Drivin gwhen your engin eis
overheate dcan caus esom efluid swhichm ay hav eleaked int othe
engin ecom partmen ttocatch fire.
In addition ,steam from an overheate denginec an caus eserious
burns, whic hcan occur jus tbyopening th ebonnet.
There is ariskofi njury.
X Stop th evehicl eimmediately, payin gattention to roa dand traffic
conditions, and switch off th eengine.
X Safeguar dthe vehicl eagainst rollin gaway (Y page 172).
X Wait until th eengineh as cooled down.
X Mak esuret hatthe air supply to th eenginer adiato risnotblocked,
e.g. by frozen slush.
X Do no tstart th eenginea gain until th edisplay message goe sout and
th ec oolan ttem perature is belo w120†. The engin emay otherwise
be damaged.
X Pay attention to th ecoolan ttem perature display.
If th etemperatur eincreases again:
X Consult aqualified specialist workshop immediately.
Under normal operating condition sand wit hthe specified coolant
level, th ecoolan ttem perature may ris eto1 20 †. #
See Owner'
sManual
See Owner' sManual The battery is no
tbein gcharged.
Aw arning tone also sounds.
Possibl ecauses:
R fault yalternator
R torn poly-V-belt
R am alfunction in th eelectronics
! Do no
tcontinue driving. The engin ecould otherwise overheat.
X Stop th evehicl eimmediately, payin gattention to roa dand traffic
conditions, and switch off th eengine.
X Safeguar dthe vehicl eagainst rollin gaway (Y page 172).
X Consult aqualified specialist workshop. Display
messages
267On-boardcomputer an ddisplays Z

Display messages
Possible causes/consequences and
M
MSolutions 4
Add
1litre engine
Add 1litre engine
oil whe nnextr efu‐
oil whe nnextr efu‐
elling elling The engin
eoil level has dropped to th eminimum level.
! Avoid lon
gjou rneys when there is to olittl ec oolan tint hecooling
system. Otherwise th eenginew ill be damaged.
X Chec kthe oil level when next refuelling, at th elatest (Y page 323).
X If necessary, to puptheengin eoil (Y page 323).
If you have to top up th eengin eoil frequently:
X Contac taqualified specialist workshop and hav ethe engine
checked.
Information on approve dengineo ils can be obtained from aqualified
specialist workshop or on th eInterne tath ttp:// bevo.mercedes-
benz.com. 4
Engine oil level Engine oil level
Stop Stop
vehicle
vehicle Switch
Switch
engine off
engine off The engin
eoil level is to olow. There is ariskofe ngined amage.
X Stop th evehicl eimmediately, payin gattention to roa dand traffic
conditions, and switch off th eengine.
X Safeguar dthe vehicl eagainst rollin gaway (Y page 172).
X Chec kthe engin eoil level (Y page 323).
X If necessary, to puptheengin eoil (Y page 323). 8
Reserv
efuell evel
Reserv efuell evel The fuel level has dropped int
othe reserv erange.
Operation of th eauxiliar yheating is deactivated if th efuel level drops
int ot he reserv erange.
X Refue lattheneares tfilling station. C There is ver
ylittl efuel in th efuel tank.
The auxiliary heating canno tbeoperated.
X Refue lattheneares tfilling station without fail. ¸
Replac
eair cleaner
Replac eair cleaner Vehicles wit
hadiesel engine: th eenginea ir filter is dirty and mus tbe
replaced.
X Consult aqualified specialist workshop. !
Clean the fue
lfil‐
Clean the fue lfil‐
ter ter Vehicles wit
hadiesel engine: there is water in th efuel filter. The water
mus tbed rainedoff.
X Consult aqualified specialist workshop. Refill AdBlue See
Refill AdBlue See
Owner’
sManual
Owner’ sManual The AdBlue
®
level has fallen belo wthe reserv erange. Awarning tone
also sounds.
X Refill AdBlue ®
as soo naspossible(Ypage 169). Refill AdBlue No Refill AdBlue No
start in ... mi start in ... mi
The AdBlue
®
level is only sufficien tfor th eindicated distance. Awarn-
ing tone also sounds.
X Refill AdBlue ®
immediately (Y page 169).
i If you drive th
evehicl efaste rtha n15k m/hthe Refill Refill AdBlue
AdBlue
No start in ... mi No start in ... mi message goesout after approximately one
minute. Display
messages
269On-boardcomputer an ddisplays Z

Display messages
Possible causes/consequences and
M
MSolutions ¨
Sto
pv ehicl eVehi‐
Sto pv ehicl eVehi‐
cle too low cle too low You hav
epulled away while th evehicl elevel is still to olow.
AIRMATIC set sthe vehicl etotheselected level after ashort period.
X Pull ove rand stop th evehicl esafely as soo naspossible, paying
attention to roa dand traffic conditions.
X Safeguar dthe vehicl eagainst rollin gaway (Y page 172).
X Wait until th edisplay message disappear sbefore pullin gaway. AIRMATIC is faulty.
Awarning tone also sounds.
X Do no tdrive at speeds abov e80km/h.
X Mak eonlys light steering movements. Otherwise ,the fron twings or
th et yres could be damaged if th esteering movement is to ogreat.
X Liste nfor scraping sounds.
X Pull ove rand stop th evehicl esafely, payin gattention to roa dand
traffic conditions, and set ahigher vehicl elevel.
Dependin gonthemalfunction ,itmay be possibl etoraisethe vehi-
cle.
X Consult aqualified specialist workshop. ¨
Malfunction Malfunction The AIRMATIC function is restricted. The vehicle's handlin
gcharac-
teristics may be affected.
X Do no tdrive at speeds abov e80km/h.
X Consult aqualified specialist workshop. Lane
Lane
Keeping
Keeping Assist
Assist
currently unavaila‐
currently unavaila‐
ble ble See
SeeOwner's
Owner's Man‐
Man‐
ual
ual orActive Lane
Active Lane
Keepin gAssist cur‐
Keepin gAssist cur‐
rently unavailable
rently unavailable
See Owner' sManual
See Owner' sManual Lan
eKeepin gAssistorA ctiveLaneK eepin gAssistisd eactivated and
temporarily inoperative.
Possibl ecauses:
R thew indscree nisdirty in th ecamera' sfield of vision
R visibilit yisimpaire ddue to heav yrain ,sno worf og
R there hav ebeen no lan emarking sfor an extended period
R thel an em arking sare worn, dark or covered, e.g. by dir torsnow
Once th ecauses listed abov enolonger apply, th edisplay message
goe sout.
Lan eKeepin gAssistorA ctiveLaneK eepin gAssistiso perational
again.
If th edisplay message does no tdisappear:
X Pull ove rand stop th evehicl esafely as soo naspossible, paying
attention to roa dand traffic conditions.
X Safeguar dthe vehicl eagainst rollin gaway (Y page 172).
X Clean th ewindscreen. Lane Lane
Keeping
Keeping Assist
Assist
inoperative
inoperative or
Active
Active Lane
Lane Keeping
Keeping
Assist inoperative
Assist inoperative Lan
eKeepin gAssistorA ctiveLaneK eepin gAssistisf aulty.
X Consult aqualified specialist workshop. Display
messages
271On-boardcomputer an ddisplays Z

Display messages
Possible causes/consequences and
M
MSolutions Active Parking Assis
tisunavailable or faulty.
X Switc hoff th eignition and restar tthe engine.
If Active Parking Assis tcontinue stobeu navailable (the jsymbol
does no tappear in th emultifunction display):
X Consult aqualified specialist workshop. Par
kA ssist
Par kA ssist
switched off
switched off The vehicl
eisparked. Awarning tone also sounds.
The display message disappear sautomatically. Traffic
Traffic
Sign
SignAssist
Assist
currently unavaila‐
currently unavaila‐
ble ble See
SeeOwner's
Owner's Man‐
Man‐
ual
ual Traffic Sig
nAssistist emporarily inoperative.
Possibl ecauses:
R thew indscree nisdirty in th ecamera' sfield of vision
R visibilit yisimpaire ddue to heav yrain ,sno worf og
X Clean th ewindscreen.
If th esystem detects that th ecamera is full yoperational, th edisplay
message disappears.
Traffic Sig nAssistiso perational again. Traffic Traffic
Sign
SignAssist
Assist
inoperative
inoperative Traffic Sig
nAssistisf aulty.
X Consult aqualified specialist workshop. ë
Off Off The HOLD function is deactivated. The vehicl
eisskidding.
Aw arning tone also sounds.
X Reactivat ethe HOLD function later (Y page 192). The HOLD function is deactivated. Whe
nthe brak epedal is firmly
depressed, an activation condition is no tfulfilled.
Aw arning tone also sounds.
X Chec kthe activation condition sfor th eHOLDf unction
(Y page 192). DISTRONIC PLU
Soff
DISTRONIC PLU Soff DISTRONI
CPLUSh as been deactivated (Y page 184).
If it was no tdeactivated by th edriver ,aw arning tone also sounds. DISTRONIC PLUS
DISTRONIC PLUS
available again available again DISTRONI
CPLUSiso perational again after having been temporarily
unavailable .You can no wreactivat eDISTR ONICPLUS(Ypage 184). Display
messages
273On-boardcomputer an ddisplays Z

Display messages
Possible causes/consequences and
M
MSolutions DTR+: steering
DTR+: steering
assist
.currently
assist .currently
unavailable unavailable See
SeeOwn‐
Own‐
er' sM anual
er' sM anual Steering Assis
tand Stop&Go Pilo tare temporarily inoperative.
Possibl ecauses:
R thew indscree nisdirty in th ecamera' sfield of vision
R visibilit yisimpaire ddue to heav yrain ,sno worf og
R there are no lan emarking sfor alon gore xtende dperiod
R thel an em arking sare worn, dark or covered, e.g. by dir torsnow
Once th ecauses listed abov enolonger apply, th edisplay message
goe sout.
Steering Assis tand Stop&Go Pilo tare operative again.
If th edisplay message does no tdisappear:
X Pull ove rand stop th evehicl esafely as soo naspossible, paying
attention to roa dand traffic conditions.
X Safeguar dthe vehicl eagainst rollin gaway (Y page 172).
X Clean th ewindscreen. DTR+: steering
DTR+: steering
assistant inopera‐ assistant inopera‐
tive tive Steering Assis
tand Stop&Go Pilo tare faulty.
However, th eDISTR ONICPLUSfunction sare still available.
Aw arning tone also sounds.
X Consult aqualified specialist workshop. Cruise contro
land
Cruise contro land
SPEEDTRONIC inoper‐
SPEEDTRONIC inoper‐
ative ative SPEEDTRONI
Cand cruise control are malfunctioning.
Aw arning tone also sounds.
X Consult aqualified specialist workshop. SPEEDTRONIC suspen‐
SPEEDTRONIC suspen‐
ded ded Whe
nyou depress th eaccelerato rpedal beyon dthe pressur epoint
(kickdown), SPEEDTRONI Cisswitched to passive mode.
The speed limitation is no tactive.
X Drive slower than th estoreds peed without kickdown.
or X Se tan ewspeed.
or X Call up th elast speed store dagain.
Whe nthe display message disappears, th espeed limitation is active. SPEEDTRONIC Limit
SPEEDTRONIC Limit
---m
ph
---m ph SPEEDTRONI
Ccanno tbea ctivated, as th eactivation condition shave
no ta ll been met.
X Chec kthe activation condition sfor SPEEDTRONI C(Ypage 182). Display
messages
275On-boardcomputer an ddisplays Z

Tyres
Display messages
Possible causes/consequence
sand M
MSolutions Tyre
Tyre
pressure
pressure Check
Check
tyres
tyres The tyr
epressure loss warning system ha sdetecte das ignificant loss
in pressure.
Aw arning tone also sounds.
Possibl ecauses:
R youh avec hange dthe positions of the wheels and tyres or fitte dnew
wheels and tyres
R the tyr epressure in one or mor etyres ha sdropped
G WARNING
Underinflated tyres pose the following risks:
R the tyres ma yburst, especially as the load and vehicl espeed
increase
R the tyres ma yweare xcessivel yand/or unevenly, which ma ygreatly
impai rtyret raction
R the drivin gcharacteristics, as well as steerin gand braking ,maybe
greatl yimpaired
There is ariskofana ccident.
X Stop the vehicl ewithou tmaking any sudden steerin gorbraking
manoeuvres .Pay attentio ntothe traffi cconditions as yo udoso.
X Safeguard the vehicl eagain st rolling away (Y page 172).
X Check the tyres and ,ifnecessary ,follo wthe instructions for aflat
tyr e(Ypage 337).
X Check the tyr epressures and ,ifnecessary ,correct the tyr epres-
sure.
X Restart the tyr epressure loss warning system when the tyr epres-
sure is correct (Y page 358). Check tyr
epres‐
Check tyr epres‐
sures the nrestart
sures the nrestart
Run Fla tIndicator
Run Fla tIndicator The tyr
epressure loss warning system generated adisplay message
and ha snot been restarted since.
X Set the correct tyr epressure in al lfou rtyres.
X Restart the tyr epressure loss warning system (Y page 358).Run Fla
tIndicator
Run Fla tIndicator
inoperative
inoperative The tyr
epressure loss warning system is faulty.
X Consult aquali fied specialis tworkshop. Rectif
ytyrep res‐
Rectif ytyrep res‐
sure
sure The tyr
epressure is too lo winatleastone of the tyres, or the tyre
pressure differenc ebetween the wheels is too great.
X Check the tyr epressures at the next opportunity (Y page 359).
X If necessary ,correct the tyr epressure.
X Restart the tyr epressure monitor (Y page 360). Displa
ymessages
277On-boardcomputer an ddisplays Z