2015 MERCEDES-BENZ C-CLASS COUPE brake light

Display messages
Possible causes/consequences and
M
MSolutions !
Parkin
gbrake inop‐
Parkin gbrake inop‐
erative erative The yellow
!warning lamp lights up. The red !indicator lamp
flashes for about te nseconds after th eelectric parking brak ehas been
applie dorreleased. It then goe sout or remain slit.
The electric parking brak eismalfunctioning ,e.g.b ecause of over-
voltag eorundervoltage.
X Rectify th ecaus eoft heovervoltage or undervoltage, e.g. by charg-
ing th ebattery or restarting th eengine.
X Apply or release th eelectric parking brake.
If th eelectric parking brak estill canno tbeappliedorr eleased:
X Switc hoff th eignition and tur nitbacko n.
X Apply or release th eelectric parking brake.
If th eelectric parking brak estill canno tbereleased:
X Consult aqualified specialist workshop.
If it is still no tpossibl etoapply th eelectric parking brake:
X Consult aqualified specialist workshop. The yellow
!warning lamp lights up and th ered ! indicator
lamp flashes.
It is no tpossibl etoapply th eelectric parking brak emanually.
X Vehicles wit hmanua ltra nsmission: engage first gear.
X Vehicles wit hautomatic transmission: shift thetransmission to
position P.
X Consult aqualified specialist workshop. J
Check brake fluid Check brake fluid
level level There is insufficien
tbrak efluid in th ebrak efluid reservoir.
In addition ,the red J warning lamp lights up in th einstrument
cluste rand aw arning tone sounds.
G WARNING
Braking efficiency may be impaired.
There is ariskofana ccident.
X Pull ove rand stop th evehicl esafely as soo naspossible, paying
attention to roa dand traffic conditions. Do no tcontinue driving
under any circumstances.
X Safeguar dthe vehicl eagainst rollin gaway (Y page 172).
X Consult aqualified specialist workshop.
X Do no ttop up th ebrak efluid .This does no tcorrect thef ault. #
Check Check
brake
brakepad
padwear
wear The brak
epads/linings hav ereached their wear limit.
X Consult aqualified specialist workshop. G
Inoperative Inoperative On
eorm orem ain features of th eMercedes-Ben zContac tsystem are
malfunctioning.
X Consult aqualified specialist workshop. Display
messages
259On-boardcomputer an ddisplays Z

Display messages
Possible causes/consequences and
M
MSolutions PRE-SAFE Functions
PRE-SAFE Functions
limited limited
See
SeeOwner's
Owner's
Manual
Manual PRE
‑SAFE ®
PLU SorP RE‑SAFE ®
Brake is unavailable due to amal-
function .BAS PLU SwithC ross-Traffic Assis tmay also hav efailed.
X Consult aqualified specialist workshop immediately. Radar
Radar
sensors
sensors dirty
dirty
See Owner' sManual
See Owner' sManual At least on
eofthefollowin gdrivin gsystems or drivin gsafet ysystems
is temporarily restricted or inoperative:
R PRE-SAFE ®
PLUS
R PRE-SAFE ®
Brake
R COLLISION PREVENTION ASSIST PLUS
R Active Lan eKeepin gAssist
R Active Blind Spot Assist
R DISTRONI CPLUSw ithS teering Assis tand Stop&Go Pilot
If th eradar sensor system in fron tisdirty, Active Blind Spot Assis twill
no tp erfor mac ourse-correcting brak eapplication.
Possibl ecauses:
R thes ensor sintheradiato rtrima nd/o rinthebumpers are dirty
R thef unction of th edrivin gsystem or drivin gsafet ysystem is
impaire ddue to heav yrain or snow
Aw arning tone also sounds.
Once th ecauses listed abov enolonger apply, th edisplay message
goe sout.A lldrivin gsystems or drivin gsafet ysystems are 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 Switc hoff th eengine.
X Clean th esensor s(Ypage 330) in th efollowin glocations:
R in th eradiato rtrim
R in th efront bumper
R in th erear bumper, particularly in th emiddle of th erear bumper
X Restart th eengine.
The display message disappears. 6
Restraint sys
.mal‐
Restraint sys .mal‐
function Consult function Consult
workshop workshop The restrain
tsystem is faulty. The 6warning lamp also lights up in
th ei nstrumen tcluster.
G WARNING
The airbags or belt tensioners may either be triggered unintentionally or, in th eevent of an accident, may no tbetriggered.
This poses an increased ris kofinjury.
X Consult aqualified specialist workshop immediately.
Fo rfurther information about th erestrain tsystem, see (Y page 39). Display
messages
261On-boardcomputer an ddisplays Z

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 !
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 indicator lamp for the electric parking brake flashes or is lit and/or the
yellow warning lamp for the electric parking brake is lit.
X Observe the additiona ldisplay messages in the multifunction display. 6
N
The red restraint system warning lamp is lit while the engine is running.
The restraint system is faulty.
G WARNING
The airbags or beltt ensioners may either be triggere dunintentionally or, in the
event of an accident, may not be triggered.
This poses an increased risk of injury.
X Observe the additiona ldisplay messages in the multifunction display.
X Drive on carefully.
X Contact aqualified specialist worksho pimmediatel yand have the restraint sys-
tem checked.
For further information about the restraint system, see (Y page39). Engine
Warning/
indicator
lamp
N N
Signal type
Possiblec auses/consequences and M
M Solutions ;
N
The yellow engine diagnostics warning lamp lights up while the engine is run-
ning.
There may be afault, for example:
R in the engine management
R in the fuel injection system
R in the exhaust system
R in the ignitio nsystem (for vehicles with petrol engines)
R in the fuel system
The emission limi tvalues may be exceede dand the engine may be running in
emergency mode.
X Consult aqualified specialist worksho pimmediately.
Vehicles with adiesel engine: the fuel tank has been run dry (Y page169).
X Start the engine three to four times after refuelling.
If the yellow engine diagnostics warning lamp goes out, emergency running
mode is cancelled. The vehicl eneed not be checked. 8
N
The yellow reserve fuel warning lamp is on while the engine is running.
The fuel leve lhas dropped into the reserve range.
Operation of the auxiliary heating is deactivated if the fuel leve ldrops into the
reserve range.
X Refuel at the neares tfilling station. 290
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

Observe the legal requirements for each indi-
vidualc ountry.
X Do not use hot water and do not wash the
vehicle in direct sunlight.
X Use asoft sponge to clean.
X Use amild cleaning agent, such as acar
shampoo approved by Mercedes-Benz.
X Thoroughly hose down the vehicle with agen-
tle jet of water.
X Do not point the water jet directly towards the
air inlet.
X Use plenty of water and rinse out the sponge
frequently.
X Rinse the vehicle with clean water and dry
thoroughly with achamois.
X Do not let the cleaning agent dry on the paint-
work.
When using the vehicle in winter, remove all
traces of road salt deposits carefully and as
soon as possible.
High-pressure cleaning equipment G
WARNING
The water jet of circular-jet nozzles (dirt grind- ers) can cause damage not visible from the
outside to tyres or chassis components. Com-
ponents damaged in this way can unexpect-
edly fail. There is arisk of an accident.
Do not use high-pressure cleaners with circu-
lar-jet nozzles to clean the vehicle. Have dam- aged tyres or chassis componentsr eplaced
immediately.
! Alwaysm
aintainadistance of at least 30 cm
between the vehicle and the high-pressure
cleaner nozzle. Information aboutt he correct
distance is available from the equipment
manufacturer.
Move the high-pressure cleaner nozzle
around when cleaning your vehicle.
Do not aim directly at any of the following:
R tyres
R door gaps, roof gaps, joints etc.
R electrical components
R battery
R connectors
R lights
R seals R
trim elements
R ventilation slots
Damaged seals or electrical componentsc an
lead to leaks or failures.
! If the key is within the rear detection range
of KEYLESS-GO, the following situations, for
example, could lead to the boot lid opening
unintentionally:
R using acar wash
R using ahigh-pressure cleaner
Make sure that the key is at least 3maway
from the vehicle.
! Edition
1special model: parts of your vehi-
cle are covered with adecorative foil. Main-
tain adistance of at least 70 cm between the
foil-wrappedp arts of the vehicle and the noz-
zle of the high pressure cleaner.
Information aboutt he correct distance is
available from the equipment manufacturer.
Move the high-pressure cleaner nozzle
around when cleaning your vehicle.
Cleaning the paintwork !
Do not affix:
R stickers
R films
R magnetic plates or similari tems
to painted surfaces. You could otherwise
damage the paintwork.
Scratches, corrosive deposits, areas affected by
corrosion and damage caused by inadequate
care cannot always be completely repaired. In
such cases, visit aqualified specialist workshop.
X Remove impurities immediately,w here pos-
sible, whilst avoiding rubbing too hard.
X Soak insect remains with insect remover and
rinse off the treated areas afterwards.
X Soak bird droppings with water and rinse off
the treated areas afterwards.
X Remove coolant, brake fluid, tree resins, oils,
fuels and greases by rubbing gently with a
cloth soaked in petroleum ether or lighter
fluid.
X Use tar remover to remove tar stains.
X Use silicone remover to remove wax. 328
CareMaintenance and care

Car
eand treatmen tofmattp aintwork !
Never polis
hthe vehicle or th elight alloy
wheels. Polishin gmakes th epaintwork shiny.
! The followin
gmay caus ethe pain tto
become shin yand thus reduc ethe matt
effect:
R vigorous rubbing wit hunsuitable materials
R frequen tuse of car washes
R washin gthe vehicle in direct sunlight
! Never use pain
tcleaner, buffing or polishing
products, or glos spreserver, e.g .wax. These
product sare only suitable for high-gloss sur-
faces. Thei ruse on vehicle swithm attp aint-
work leads to considerable surface damage
(shiny, spotte dareas).
Always have paintwork repairs carried out at a
qualified specialist workshop.
! Do no
tuse wash program swithah ot wax
treatmen tunde rany circumstances.
Observ ethese note sifyour vehicle has aclear
mat tfinish. This will help you to avoid damag eto
th ep aintwork due to incorrect treatment.
Thes enotes also apply to light-alloy wheel swith
ac lear mat tfinish.
The vehicle should preferably be washe dby
han dusingas ofts ponge, car shampoo and
plenty of water.
Use only insect remove rand car shampoo from
th er ange of approved Mercedes-Ben zcare
products. Cleaning vehicle parts
Cleaning th ewheels G
WARNING
The wate rjet of circular-jet nozzles (dir tgrind-
ers )can caus edamag enotvisible from the
outside to tyres or chassis components .Com-
ponents damaged in this way can unexpect-
edly fail. Ther eisariskofana ccident.
Do no tuse high-pressure cleaners wit hcircu-
lar-je tnozzle stoc lean th evehicle .Haved am-
aged tyres or chassis components replaced
immediately. !
Do no
tuse acidic wheel cleanin gproducts
to remove brak edust .This coul ddamage
wheel bolt sand brak ecomponents.
! Do no
tpark up th evehicle for an extended
period straigh tafter cleanin git, particularly
after having cleane dthe wheel swithw heel
cleaner. Whee lcleaners coul dcause
increased corrosion of th ebrak ediscsa nd
brak epads/linings. For this reason ,you
should driv efor afew minute safter cleaning.
Brakin gheat sthe brak ediscsa nd th ebrake
pads/linings, thus dryin gthem. The vehicle
can then be parked up.
Cleaning th ewindows G
WARNING
If th ewindscree nwiper sare set in motion
when cleanin gthe windscree norwiper
blades ,you coul dbecome trapped. Ther eisa
danger of injury.
Always switch off th ewindscree nwiper sand
th ei gnition before cleanin gthe windscree nor
wiper blades.
! Do no
tuse dry cloths, abrasive products,
solvents or cleanin gagents containing sol-
vents to clean th einside of th ewindows. Do
no ttou ch th einsides of th ewindows with
hard objects, e.g .anice scrape rorring. There
is otherwise ariskofd amaging th ewindows.
! Clean th
ewaterdrainage channels of the
windscree nand th erear window at regular
intervals. Deposits suc hasleaves, petals and
polle nmay unde rcertain circumstances pre-
ven twate rfromd raining away. This can lead
to corrosion damag eand damag etoelec-
tronic components.
X Clean th einside and outside of th ewindows
wit had amp cloth and acleanin gagen ttha tis
recommended and approved by Mercedes-
Benz.
Cleaning th ewiper blades G
WARNING
If th ewindscree nwiper sare set in motion
when cleanin gthe windscree norwiper
blades ,you coul dbecome trapped. Ther eisa
danger of injury. Care
329Maintenance and care
Z