stop start MERCEDES-BENZ C-CLASS COUPE 2015 Repair Manual

Display messages
Possible causes/consequences and
M
MSolutions DISTRONIC PLU
Scur‐
DISTRONIC PLU Scur‐
rently unavailable
rently unavailable
See Owner' sManual
See Owner' sManual DISTRONI
CPLUSist emporarily inoperative.
Steering Assis tand Stop&Go Pilo tare temporarily inoperative.
Possibl ecauses:
R ther adar sensor system is temporarily inoperative, e.g. due to elec-
tromagneti cradiation emitted by nearby TV or radi ostation sor
other source sofelectromagneti cradiation
R thes ystem is outside th eoperating temperature range
R theo n-bo ardv oltag eistoolow.
Aw arning tone also sounds.
Once th ecauses listed abov enolonger apply, th edisplay message
goe sout.
DISTRONI CPLUSiso 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 Restart th eengine. DISTRONIC DISTRONIC
PLUS
PLUSinop‐
inop‐
erative
erative DISTRONI
CPLUSisf aulty.
The followin gmay hav ealso failed:
R BA SP LUSw ithC ross-Traffic Assist
R PRE-SAFE ®
Brake
R Steering Assis tand Stop&Go Pilot
Aw arning tone also sounds.
X Consult aqualified specialist workshop. DISTRONIC PLU
Ssus‐
DISTRONIC PLU Ssus‐
pended
pended You hav
edepressed th eaccelerato rpedal .DISTR ONICPLUSisno
longer controllin gthe speed of th evehicle.
X Remove your foo tfromt heaccelerato rpedal. DISTRONIC PLUS
DISTRONIC PLUS
---m
ph
---m ph An activation condition for DISTRONI
CPLUSisn otfulfilled.
X Chec kthe activation condition sfor DISTRONI CPLUS(Ypage 184). DISTRONIC PLU
Sand
DISTRONIC PLU Sand
SPEEDTRONIC inoper‐ SPEEDTRONIC inoper‐
ative ative DISTRONI
CPLUSa nd SPEEDTRONI Care faulty. Awarning tone also
sounds.
Steering Assis tand Stop&Go Pilo tare therefor ealso unavailable.
X Consult aqualified specialist workshop. 274
Display
messagesOn-boardcomputer an ddisplays

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

Display messages
Possible causes/consequences and
M
MSolutions Check tyre(s)
Check tyre(s) The tyr
epressur einoneor mor etyres has dropped significantly. The
whee lposition is displayed in th emultifunction display.
Aw arning tone also sounds.
G WARNING
Underinflated tyres pos ethe followin grisks:
R thet yres may burst, especially as th eload and vehicl espeed
increase
R thet yres may wear excessivel yand/o runevenly, whic hmay greatly
impair tyr etraction
R thed rivin gcharacteristics ,aswell as steering and braking ,may be
greatl yimpaired
There is ariskofana ccident.
X Stop th evehicl ewithout making any sudden steering or braking
manoeuvres .Pay attention to th etraffic condition sasyou do so.
X Safeguar dthe vehicl eagainst rollin gaway (Y page 172).
X Chec kthe tyres and ,ifneces sary, follow th einstruction sfor aflat
tyr e(Ypage 337).
X Chec kthe tyrep ressur e(Ypage 359).
X If necessary, correc tthe tyrep ressure. Warnin
gtyred efect
Warnin gtyred efect The tyr
epressur einoneor mor etyres has dropped suddenly. The
whee lposition is displayed in th emultifunction display.
G WARNING
If you drive wit haflat tyre, there is ariskoft hefollowin ghazards:
R af lat tyr eaffects th eabilit ytos teer or brak ethe vehicle
R you could lose control of th evehicle
R continued drivin gwithaf lat tyr ewill caus eexces sive heat build-up
and possibl yafire
There is ariskofana ccident.
X Stop th evehicl ewithout making any sudden steering or braking
manoeuvres .Pay attention to th etraffic condition sasyou do so.
X Safeguar dthe vehicl eagainst rollin gaway (Y page 172).
X Chec kthe tyres and ,ifneces sary, follow th einstruction sfor aflat
tyr e(Ypage 337). Tyre
Tyre
press.
press. monitor
monitor
currently unavaila‐
currently unavaila‐
ble ble No signals can be received from th
etyrep ressur esensor sdue to
stron gRFi nterference. The tyr epressur emonitor is temporarily mal-
functioning.
X Drive on.
The tyr epressur emonitor restarts automatically as soo nasthe
caus ehas been rectified. 278
Display
messagesOn-boardcomputer an ddisplays

Display messages
Possible causes/consequences and
M
MSolutions Wheel sensor(s)
Wheel sensor(s)
missing missing There is no signal from th
etyrep ressur esensor of on eorseveral
wheels. The pressur eoftheaffecte dtyreisn otdisplayed in th emul-
tifunction display.
X Hav ethe fault ytyrep ressur esensor replace dataqualified spe-
cialist workshop. Tyre Tyre
press.
press. monitor
monitor
inoperative No
inoperative No
wheel sensors wheel sensors The wheels fitte
ddonothav esuitable tyr epressur esensors. The tyre
pressur emonitor is deactivated.
X Fit wheels wit hsuitable tyr epressur esensors.
The tyr epressur emonitor is activated automatically after drivin gfor
af ew minutes. Tyre
Tyre
press.
press. monitor
monitor
inoperative
inoperative The tyr
epressur emonitor is faulty.
X Consult aqualified specialist workshop. Vehicle
Display messages
Possible causes/consequences and
M
MSolutions To start engine,
To start engine,
shift to either P shift to either P
or N or N You hav
eattempte dtostart th eenginew itht he transmission in posi-
tion Ror D.
X Shift th etransmission to position Por N. Apply
Apply
brake
braketo
todese‐
dese‐
lec tP ark( P) posi‐
lec tP ark( P) posi‐
tion
tion You hav
eattempte dtomovet he transmission selector lever to posi-
tion D,Ror Nwithout depressing th ebrak epedal.
X Depress th ebrak epedal. To shift out of P
To shift out of P
or or
N,
N,depress
depress brake
brake
and start engine
and start engine Wit
hthe engin eswitched off ,you hav eattempte dtoshift th etrans-
mission out of position Por Nint oa nother transmission position.
X Depress th ebrak epedal.
X Start th eengine. Ris
kofv ehicle
Ris kofv ehicle
rollin gTransmis‐
rollin gTransmis‐
sio nn ot in P
sio nn ot in P The driver's door is open or no
tfully closed and th etransmission is in
position R,Nor D.
Aw arning tone also sounds.
G WARNING
The vehicl emay rol laway.
There is ariskofana ccident.
X Shift th etransmission to position P.
X Safeguar dthe vehicl eagainst rollin gaway (Y page 172).
X Clos ethe driver's door fully. Onl
ys elect Park
Onl ys elect Park
(P)
(P) when
when vehicle
vehicle is
is
stationary
stationary The vehicl
eismoving.
X Pull ove rand stop th evehicl esafely as soo naspossible, paying
attention to roa dand traffic conditions.
X Shift th etransmission to position P. Display
messages
279On-boardcomputer an ddisplays Z

Display messages
Possible causes/consequences and
M
MSolutions Withou
tchanging
Withou tchanging
gear, consul twork‐
gear, consul twork‐
shop
shop You canno
tchang et he transmission position due to amalfunction.
Aw arning tone also sounds.
If transmission position Dis selected:
X Drive to aqualified specialist workshop without shifting th etrans-
mission from position D.
If transmission position R,Nor Pis selected:
X Safeguar dthe vehicl eagainst rollin gaway (Y page 172).
X Consult aqualified specialist workshop. Reversing
Reversing
not
not poss.
poss.
Consul tworkshop
Consul tworkshop You canno
tshift int othe transmission position Rdue to amalfunction.
The transmission positions P,N or Dcontinu etobea vailable.
Aw arning tone also sounds.
X Consult aqualified specialist workshop. Transmission Mal‐
Transmission Mal‐
function Stop function Stop Am
alfunction has occurred in th emechanical transmission compo-
nents.
Aw arning tone also sounds. The transmission shift sautomatically to
position N.
X Pull ove rand stop th evehicl esafely as soo naspossible, paying
attention to roa dand traffic conditions.
X Shift th etransmission to position P.
X Safeguar dthe vehicl eagainst rollin gaway (Y page 172).
X Consult aqualified specialist workshop. Depres
sclutch
Depres sclutch
fully to start fully to start
engine engine You hav
eattempte dtostart th eenginew ithout depressing th eclutch
pedal.
X Full ydepress th eclutch pedal.
X Restart th eengine. The engin
ehas stalled while pullin gaway, e.g. because th eclutch
pedal was release dtoo quickly.
X Depress th eclutch pedal again.
The engin estartsa utomatically.
X Slowly release th eclutch pedal to pull away. 280
Display
messagesOn-boardcomputer an ddisplays

Display messages
Possible causes/consequences and
M
MSolutions j
Check Check
trailer
trailer hitch
hitch
lock
lock The trailer to
whitch is no tcorrectly engaged.
Aw arning tone also sounds.
G WARNING
If th eball couplin gisnotengaged, th etrailer may come loose. There
is ar iskofana ccident.
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 Engage th etrailer coupling's ball couplin gintheendp osition
(Y page 228). &
Function available Function available
again after engine again after engine
start start Vehicles wit
hthe BlueEFFICIENCY package:
Wit hthe engin eswitched off ,you hav eattempte dtoswitch on remote
activation of heating and ventilation systems mor ethant hree times.
X Let th eenginer un for te nseconds.
Afte rrunnin gthe engine, th epre-entry climat econtro lisopera-
tional again. &
inoperative inoperative
Battery
Battery
low
low th
eo n-bo ardv oltag eistoolow.
The auxiliary heating (Y page 138) has switched itself off .The auxiliary
heating or remot eactivation of heating and ventilation systems can-
no tbes witched on.
X Drive for aconsid erable distance.
The battery charges. The auxiliary heating or remot eactivation of
heating and ventilation systems is operational again as soo nasthe
on-boar delectrical system voltag eissufficient. &
inoperative Refuel inoperative Refuel
vehicle vehicle There is to
olittl efuel in th efuel tank. The auxiliary heating canno tbe
switched on (Y page 138).
X Refue lattheneares tfilling station. &
inoperative inoperative
See
SeeOwn‐
Own‐
er' sM an.
er' sM an. The auxiliary heating is temporarily malfunctioning or faulty.
X Whe nthe vehicl eisonal evel surfac eand th eengineh as cooled
down ,makeuptof oura ttempts to switch on th eauxiliary heating,
waiting several minute sbetween eac hattemp t(Y page 138).
If th eauxiliary heating does no tswitch on:
X Consult aqualified specialist workshop. 282
Display
messagesOn-boardcomputer an ddisplays

Display messages
Possible causes/consequences and
M
MSolutions Ð
Power steering mal‐ Power steering mal‐
function See Own‐ function See Own‐
er'
sM anual
er' sM anual The powe
rsteering assistanc eisfaulty.
Aw arning tone also sounds.
G WARNING
You will need to use mor eforce to steer.
There is ariskofana ccident.
X Chec kwhether you are able to apply th eextra force required.
If you ar eabletos teer safely:
X Drive on carefully.
X Consult aqualified specialist workshop immediately.
If you ar eunable to steer safely:
X Do no tdrive on.
X Consult aqualified specialist workshop. Ð
Steering malfunc‐ Steering malfunc‐
tio
nS ee Owner's
tio nS ee Owner's
Manual Manual Vehicl
ewithm anual transmission :the electric steering loc kismal-
functioning.
G WARNING
The steering may be locke dbytheelectric steering lock.
There is ariskofana ccident.
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 Do no tdrive on.
X Consult aqualified specialist workshop. _
Before Before
starting
starting the
the
engine ,turnt he
engine ,turnt he
steering wheel.
steering wheel. Vehicl
ewithm anual transmission :the electric steering loc kismal-
functioning.
X Remove th ekeyfrom th eignition lock.
X To unloc kthe steering ,movet he steering whee lslightly.
X Inser tthe keyintot he ignition loc kagain. Telephone Telephone
No
Noservice
service Your vehicl
eisoutside th enetwork provider' stransmitter/receiver
range.
X Wait until th emobile phone operational readiness symbol appears
in th emultifunction display. ¥
Top up washer fluid Top up washer fluid The washer flui
dlevel in th ewasher flui dreservoir has dropped below
th em inimum.
X Top up th ewasher flui d(Ypage 325). Display
messages
283On-boardcomputer an ddisplays Z

Key
Display messages
Possible causes/consequences and
M
MSolutions Â
Key Key
does
does not
notbelong
belong
to vehicle
to vehicle You hav
eput th ewrong ke yintheignition lock.
X Use th ecorrect key. Â
Replac
ekey
Replac ekey The ke
yneeds to be replaced.
X Consult aqualified specialist workshop. Â
Change Change
key
keybatteries
batteries The ke
ybattery is discharged.
X Replac ethe batterie s(Ypage 83). Â
Key not detected Key not detected
(whit
edisplay message) The ke
yiscurrentl yundetected.
X Change th elocation of th ekeyin th evehicle.
If th ekeystill canno tbedetected:
X Inser tthe keyintot he ignition loc kand tur nittot hedesire dposi-
tion. Â
Key not detected Key not detected
(re
dd isplay message) The ke
yisnotin th evehicle.
Aw arning tone also sounds.
If th eengineiss witched off ,you can no longer loc kthe vehicl ecen-
trally or start th eengine.
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 Locate th ekey.
X Press aon thesteering whee ltoc onfir mthedisplay message. Becaus
ethe re is interferenc efromas tron gs ource of radi owaves, the
ke yisn otdetecte dwhilstthe engin eisrunning.
Aw arning tone also sounds.
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 Inser tthe keyintot he ignition loc kand bring int okeymode. Â
Remove Remove
starting
starting but‐
but‐
ton,
ton, then
theninsert
insert key
key The ke
yiscontinually undetected.
The ke ydetection function has atem porar ymalfunction or is faulty. A
warning tone also sounds.
X Inser tthe keyintot he ignition loc kand tur nittot hedesire dposi-
tion.
X Consult aqualified specialist workshop. 284
Display
messagesOn-boardcomputer an ddisplays

Safety systems
Warning/
indicator
lamp
N N
Signal type
Possible causes/consequences and M
MSolutions J
N
The yellow brake system warning lamp lights up while the engine is running or
the ECO start/stop function is activated.
G WARNING
The brake system is malfunctioning and the braking characteristics may be affec- ted.
There is arisk of an accident.
X If the multifunction display shows adisplay message, please observe this.
X Drive on carefully.
X Consult aqualified specialist workshop immediately. J
N
The red brake system warning lamp is lit while the engine is running.
Aw arning tone also sounds.
G WARNING
The brake boosting effect is malfunctioning and the braking characteristics may be
affected.
There is arisk of an accident.
X Pull over and stop the vehicle safely as soon as possible, paying attention to road
and traffic conditions. Do not continue driving under any circumstances.
X Safeguard the vehicle against rolling away (Y page 172).
X Consult aqualified specialist workshop.
X Observe the additional display messages in the multifunction display. J
N
The red brake system warning lamp is lit while the engine is running.
Aw arning tone also sounds.
There is insufficient brake fluid in the brake fluid reservoir.
G WARNING
Braking efficiency may be impaired.
There is arisk of an accident.
X Pull over and stop the vehicle safely as soon as possible, paying attention to road
and traffic conditions. Do not continue driving under any circumstances.
X Safeguard the vehicle against rolling away (Y page 172).
X Do not top up the brake fluid. Topping up will not rectify the fault.
X Consult aqualified specialist workshop.
X Observe the additional display messages in the multifunction display. 286
Warning and indicator lampsint
he instrument clusterOn-board computer and displays

Warning/
indicator
lamp
N N
Signal type
Possiblec auses/consequences and M
MSolutions å
N
The yellow ESP ®
OFF warning lamp is lit while the engine is running or the ECO
start/stop function is activated.
ESP ®
is deactivated.
G WARNING
If ESP ®
is deactivated, ESP ®
is unable to stabilise the vehicle.
Further driving systems or driving safety systems are thus restricted, e.g. Active
Blind Spot Assist. The system does not perform braking actions.
There is an increased dange rofskidding and risk of an accident.
X Reactivate ESP ®
.
In rare cases it may be better to deactivate ESP ®
:
R all vehicles except Mercedes-AMG vehicles (Y page72)
R Mercedes-AMG vehicles (Y page73)
Observe the important safety notes on ESP ®
(Y page7 2).
X Adapt yourd riving style to suitt he road and weather conditions.
If ESP ®
cannot be activated:
X Drive on carefully.
X Contact aqualified specialist worksho pimmediatel yand have the ESP ®
system
checked. M
N
Mercedes-AMG vehicles only:
The yellow SPORT handling mode warning lamp is lit while the engine is running.
SPORT handling mode is activated.
G WARNING
When SPORT handling mode is activated, ESP ®
is unable to stabilise the vehicle.
There is an increased dange rofskidding and risk of an accident.
X Only switch to SPORT handling mode in accordance with the conditions descri-
bed in the "Activating/deactivating ESP ®
"s ection (Y page73). Warning and indicator lamps in the instrument cluster
289On-board computer and displays Z