2015 MERCEDES-BENZ C-CLASS COUPE lock

Display messages
Possible causes/consequences and
M
MSolutions Clutch overheated
Clutch overheated
Avoid pullin
gaway
Avoid pullin gaway
Engage/disengage Engage/disengage
clutch quickl yif
clutch quickl yif
req. req. The clutch is under considerable load and th
epermitte doperating
temperature has been exceeded .Awarning tone also sounds.
Avoid frequen tpullin gaway and drivin gatwalking pac eoverlonger
distances.
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 Leav ethe engin erunning.
The clutch is cooled mor equickl ywitht he engin erunning.
or
X If possible, continu edrivin gatas teady speed.
X Remove your foo tfro mt heclutch pedal and do no tallow th eclutch
to slip.
The clutch may also cool down during th ejou rney.
It may tak eseveral minute sfor it to cool down .Whent he clutch has
cooled down ,the display message disappears. The clutch is fully
operational again. N The boot lid is open.
X Clos ethe boot lid. M The bonne
tisopen.Aw arning tone also sounds.
G WARNING
The open bonne tmay then bloc kyour vie wwhen th evehicl eisin
motion.
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 Clos ethe bonnet. Active bonnet mal‐ Active bonnet mal‐
function See Own‐ function See Own‐
er'
sM anual
er' sM anual The active bonne
t(pedestrian protection )isnotactive due to amal-
function or because it has already been triggered.
X Consult aqualified specialist workshop. C At least on
edoor is open .Awarning tone also sounds.
X Clos eall doors. _
Front lef
tseat
Front lef tseat
backrest backrest not
notlocked
locked
or Front right seat
Front right seat
backrest not locked
backrest not locked The driver's or front-passenger seat backrest is no
tengaged. Awarn-
ing tone also sounds.
X Push th ebackrest bac kuntil it engages. Display
messages
281On-boardcomputer an ddisplays Z

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

Warning/
indicator
lamp
N N
Signal type
Possiblec auses/consequences and M
MSolutions !
N
The yellow ABS warning lamp is lit while the engine is running.
ABS (Anti-lock Braking System) is faulty.
An additiona lwarning tone indicates that EBD (electronic brake force distribution)
is faulty.
Other driving and driving safety systems may alsobef aulty.
G WARNING
The brake system continues to function normally, but without the functions listed above. The front and rear wheels coul dtherefore lock, for example, if you brake
hard.
The steerability and braking characteristics may be severely affected. The braking
distance may increas einanemergency braking situation.
If ESP ®
is not operational ,ESP ®
is unable to stabilise the vehicle.
There is an increased dange rofskidding and risk of an accident.
X Observe the additiona ldisplay messages in the multifunction display.
X Drive on carefully.
X Consult aqualified specialist worksho pimmediately.
If the ABS control unit is faulty, there is alsoap ossibility that other systems,such
as the navigation system or the automatic transmission, willbeu navailable.J÷
!
N
The red brake system warning lamp and the yellow ESP ®
and ABS warning lamps
light up while the engine is running.
ABS and ESP ®
are faulty.
Other driving and driving safety systems may alsobef aulty.
G WARNING
The brake system continues to function normally, but without the functions listed above. The front and rear wheels coul dtherefore lock, for example, if you brake
hard.
The steerability and braking characteristics may be severely affected. The braking
distance may increas einanemergency braking situation.
If ESP ®
is not operational ,ESP ®
is unable to stabilise the vehicle.
There is an increased dange rofskidding and risk of an accident.
X Observe the additiona ldisplay messages in the multifunction display.
X Drive on carefully.
X Consult aqualified specialist worksho pimmediately. Warning and indicator lamps in the instrument cluster
287On-board computer and displays Z

Warning/
indicator
lamp
N N
Signal type
Possiblec auses/consequences and M
M Solutions ?
N
The red coolant warning lamp comes on while the engine is running.
The coolant leve listoo low.
If the coolant leve liscorrect, the airflow to the engine radiator may be blocked or
the electric engine radiator fan may be malfunctioning.
The coolant is too hot and the engine is no longer being coole dsufficiently.
X Observe the additiona ldisplay messages in the multifunction display.
X Stop the vehicl eimmediately, paying attention to road and traffic conditions,
and switch off the engine.
X Safeguard the vehicl eagainst rolling away( Ypage1 72).
X Leave the vehicl eand keep asafe distance from the vehicl euntil the engine has
coole ddown.
X Check the coolant leve land top up the coolant, observing the warning notes
(Y page3 24).
X If you have to top up the coolant frequently, have the engine cooling system
checked.
X Make sure that the air supply to the engine radiator is not blocked ,e.g. by frozen
slush.
X Do not start the engine again until the coolant temperature is below 120 †. The
engine may otherwise be damaged.
X Drive to the neares tqualified specialist workshop.
X Avoid heavy loads on the engine as you do so, e.g. driving in mountainous terrain
and stop-start traffic. ?
N
The red coolant warning lamp comes on while the engine is running. Awarning
tone alsos ounds.
The coolant temperature has exceede d120 †. The airflow to the engine radiator
may be blocked or the coolant leve lmay be too low.
G WARNING
The engine is not being coole dsufficiently and may be damaged.
Never drive with an overheated engine. Driving when youre ngine is overheated
can caus esome fluids which may have leaked into the engine compartment to
catch fire.
In addition, steam from an overheated engine can caus eserious burns, which can
occur just by opening the bonnet.
There is arisk of injury.
X Observe the additiona ldisplay messages in the multifunction display.
X Stop the vehicl eimmediately, paying attention to road and traffic conditions,
and switch off the engine.
X Safeguard the vehicl eagainst rolling away( Ypage1 72).
X Leave the vehicl eand keep asafe distance from the vehicl euntil the engine has
coole ddown.
X Check the coolant leve land top up the coolant, observing the warning notes
(Y page3 24).
X If you have to top up the coolant frequently, have the engine cooling system
checked. 292
Warning and indicator lamps in the instrument clusterOn-board computer and displays

Warning/
indicator
lamp
N N
Signal type
Possiblec auses/consequences and M
MSolutions X
Make sure that the air supply to the engine radiator is not blocked ,e.g. by frozen
slush.
X If the coolant temperature is below 120 †, you can continue driving to the
neares tqualified specialist workshop.
X Avoid heavy loads on the engine as you do so, e.g. driving in mountainous terrain
and stop-start traffic. Driving systems
Warning/
indicator
lamp
N N
Signal type
Possiblec auses/consequences and M
MSolutions ·
N
The red distance warning lamp lights up while the vehicl eisinmotion.
The distance to the vehicl einfront is too smal lfor the spee dselected.
X Increase the distance. ·
N
The red distance warning lamp lights up while the vehicl eisinmotion.Awarning
tone alsos ounds.
You are approaching avehicle, apedestrian or astationary obstacl einyourline of
travel at too high aspeed.
X Be prepared to brake immediately.
X Pay carefu lattention to the traffic situation. You may have to brake or take
evasive action.
Further information on PRE ‑SAFE®
Brake (Y page75).
For further information on the distance warning function of COLLISION PREVEN-
TION ASSIST PLUS, see (Y page69). Warning and indicator lamps in the instrument cluster
293On-board computer and displays Z

You can navigate in menus and lists via touch-
sensitiv esurface :by using asingle finger
swiping gesture .
X To select th emenu item: swipe up, down, to
the left or right.
X Press the touchpad.
X To move th edigital map: swipe in all direc-
tions.
Use atwo-finger swiping gesture ,e.g. to use
these functions:
X To show or hide th eaudio menu: swipe up
or down with two fingers.
X To increase or reduce th
evehicle settings
and sound settings: turn two fingers clock-
wise or anti-clockwise.
X To zoom in and out of th emap:move two
fingers together or apart.
Character inpu twith handwriting rec-
ognition Entering characters
X Use one finger to write characters on the sur-
face.
The character is entered in the input line. If
the character that you have entered can be
interpreted in differen tways, the suggested
characters are displayed.
X If character suggestions are shown ,turn and
press the controller.
X Resume character input on the touchpad.
Handwriting recognition :
Activ einput line
; To enter aspace
= Character input on the touchpad
? To delete characters
X To display th emenu: press the touchpad. :
To exit the menu
; To return to handwritin grecognition
= To use the phon ebook or tex ttemplates
(COMAN DOnline)
? To selec tthe input line or to change the
position of the cursor
A To switc hthe language
B To finish character entry
X To select th einpu tline: select p.
X Swipe up or down.
X To move th
ecursor within th einpu tline:
select p.
X Swipe to the left or right.
X To delet echaracters: swipe to the left if an
input line is selected.
X To confirm th eentry: press the touchpad.
Switchin gthe handwriting recognition
read-aloud function on and off
Multimedia system:
X Select Vehicle VehicleQ System set‐ System set‐
tings
tingsQRead out handwriting recog‐ Read out handwriting recog‐
nition
nition.
The read-aloud function is switched on Oor
off ª. 298
Operating systemMultimedia system