2017 MERCEDES-BENZ C-Class COUPE Owner's Manual

Engine compartment
Hood
Important safety notes
GWARNING
If th ehood is unlatched, it may open up when
th ev ehicle is in motion and blocky our view.
Thereisar isk of an accident.
Never unlatch th ehood while driving .Before
ever ytrip, ensure that th ehood is locked.
GWARNING
When opening and closingt hehood,itm ay
suddenly fall int othe closed position.T hereis
ar isk of injury to personsw ithin range of
movementoft hehood.
Open and close th ehood only when no onei s
within its range of movement.
GWARNING
Opening th ehood when th eengine is over-
heated or when there is afireint heengine
compartmen tcoul de xpose you to hot gases
or other servic eproducts. Thereisar isk of
injury.
Let an overheate dengine coo ldown before
opening th ehood.Ift here is afireint he
engine compartment, keep th ehood closed
and contac tthe fired epartment.
GWARNING
The engine compartmen tcontain smoving
components. Certain components, sucha s
th er adiator fan ,may continue to run or start
again suddenly when th eignition is off .There
is ar isk of injury.
If you nee dtodoany work inside th eengine
compartment:
Rswitch off th eignition
Rnever reac hintot he area wheret here is a
risk of danger from moving components,
suchast hefan rotatio narea
Rremove jewelry and watches
Rkeep items of clothing and hair, for exam-
ple, away from moving parts
GWARNING
The ignition system and th efuel injection sys-
te mw ork unde rhigh voltage. If you touch
component swhicha re unde rvoltage, you
coul dget an electric shock. Thereisar isk of
injury.
Never touch component softheignition sys-
te morf uel injection system when th eignition
is switched on.
Opening th ehood
GWARNING
Certain component sintheengine compart-
ment, suchast heengine ,radiator and parts
of th eexhaust system, can become ver yhot.
Workin gintheengine compartmen tposesa
risk of injury.
Wherep ossible, let th eengine coo ldown and
touch only th ecomponent sdescribe dinthe
following.
GWARNING
When th ehood is open and th ewindshield
wipersa re set in motion,y ou can be injured by
th ew iper linkage. Thereisar isk of injury.
Always switch off th ewindshield wipersa nd
th ei gnition before opening th ehood.
!Makes ure that th ewindshield wipersa re
no tfolded away from th ewindshield. You
coul dotherwise damag ethe windshield wip-
ers or th ehood.
Engine compartment287
Maintenance and care
Z

XMake sure that the windshield wipers are
turned off.
XPull release lever:on the hood.
The hood is released.
XReach into the gap, pull hood catch handle ;
up and lift the hood.
If you lift the hood by approximately 15 in
(40 cm), the hood is opened and held open
automatically by the gas-filled strut.
Closing the hood
XLower the hood and let it fall from aheight of
approximately 8in(20 cm).
XCheck that the hood has engaged properly.
If the hood can be raised slightly, it is not
properly engaged. Open it again and close it
withalittle more force.
Radiator
Do not cover up the radiator, such as with a
thermal mat or insect protection cover. The
readings of the on-board-diagnostic system may
otherwise be inaccurate. Some of these read-
ings are required by law and must be accurate at
all times.
Engine oil
Important safety notes
GWARNING
Certain components in the engine compart-
ment, such as the engine, radiator and parts
of the exhaust system, can become very hot.
Working in the engine compartmentp oses a
risk of injury.
Where possible, let the engine cool down and touch only the components described in the
following.
GWARNING
If engine oil comes into contact with hot com- ponentsint he engine compartment, it may
ignite. There is arisk of fire and injury.
Make sure that engine oil is not spilled next to
the filler neck.L et the engine cool down and
thoroughly clean the engine oil off the com-
ponentsb efore startin gthe engine.
General notes
Depending on your driving style, the vehicle
consumes up to 0.9 US qt (0.8 liters) of oil per
600 miles (1,000 km). The oil consumption may
be higher than this when the vehicle is new or if
you frequently drive at high engine speeds.
Depending on the engine, the oil dipstick may be
inad ifferent location.
When checking the oil level:
Rpark the vehicle on alevel surface
Rthe engine should be switched off for approx-
imately five minutes if the engine is at normal
operating temperature
Rall vehicles (except Mercedes-AMG C63/C
63S): if the engine is not at normal operating
temperature, e.g. if the engine was only star-
ted briefly, wait approximately 30 minutes
before carrying out the measurement
The oil level of the Mercedes-AMG C63/C 63 S
must be checked only when the engine is at
normal operating temperature.
288Engine compartment
Maintenance and care

Checking theoil level usin gthe oil dip-
stick
Example
XPull oil dipstick :out of th edipstick guide
tube.
XWipe off oil dipstick :.
XSlowly slide dipstick :intothe guide tub eto
th es top, and tak eitout again after approx-
imately 3seconds.
If th elevelisb etween MIN mark =and MAX
mark ;,theoil leve liscorrect.
XIf theoil leve lhas dropped to MIN mark =or
below, add 1. 1USqt(1.0l iter) of engineo il.
Adding engine oil
HEnvironmental note
When addingo il, takecaren otto spill any. If
oil enters th esoil or waterways, it is harmful to
th ee nvironment.
!Only use engineo ils and oil filters that have
been approved for vehicle swithas ervicesys-
tem. You can obtain alist of th eengineo ils
and oil filters tested and approved in accord- anc ewitht heMercedes-Ben zSpecifications
for Servic eProduct satany Mercedes-Benz
Servic ecenter.
Damage to th eengineore xhaust system is
caused by th efollowing:
Rusinge ngineo ils and oil filters that have not
been specifically approved for th eservice
system
Rreplacin gengineo il and oil filters after the
interval for replacements pecifiedbythe
servic esystem has been exceeded
Rusinge ngineo il additives.
!Do no tadd to omucho il. addingt oomuch
engineo il can result in damagetot heengine
or to th ecatalyti cconverter. Hav eexcess
engineo il siphoned off.
Example
XTurn cap :counter-clockwise and remove it.
XAdde ngineo il.
If th eoil leve lisatorb elow theMIN mar kon
th eo il dipstick ,add 1. 1USq t(1.0 l)of engine
oil.
XReplace cap :on the filler neck and turn
clockwise.
Ensure that the cap locks into place securely.
XCheck the oil level again with the oil dipstick
(Ypage 289).
Further information on engine oil (
Ypage 346).
Additional service products
Important safety notes
GWARNING
Certain components in the engine compart-
ment,s uch as the engine, radiator and parts
of the exhaust system, can become very hot.
Working in the engine compartment poses a
risk of injury.
Where possible, let the engine cool down and touch only the components described in the
following.
GWARNING
The cooling system is pressurized, particularly
when the motor is warm. If you open the cap,
you could be scalded if hot coolant sprays out.
There is arisk of injury.
Engine compartment289
Maintenance and care
Z

Let the engine cool down before you open the
cap. Wear gloves and eye protection. Slowly
open the cap to relieve pressure.
GWARNING
Windshield washer concentrate could ignite if it comes into contact with hot engine compo-
nents or the exhaust system. There is arisk of
fire and injury.
Make sure that no windshield washer con-
centrate is spilled next to the fillern eck.
Checking coolant level
XPark the vehicle onalevel surface.
Only check the coolant level when the vehicle
is on alevel surface and the engine has cooled
down.
XTurn the SmartKey to position 2in the ignition
lock (Ypage 131).
or
XOn vehiclesw ith KEYLESS-GO, press the
Start/Stop button twice (Ypage 131).
XCheck the coolant temperature display in the
instrument cluster (Ypage 201).
The coolant temperature must be below
158 ‡(70 †).
XTurn the SmartKey to position 0in the ignition
lock (Ypage 131).
or
XOn vehiclesw ith KEYLESS-GO, pul lthe Start/
Stop button from the ignition lock
(
Ypage 131).
XSlowl yturn cap :half aturn counter-clock-
wise to allow excess pressure to escape.
XTurn cap :further counter-clockwise and
remove it.
If the coolant is at the level of marker bar =
in the fillern eck when cold, there is enough
coolant in coolant expansio ntank ;.
If the coolant level is approximately 0.6 in
(1.5 cm) above marker bar =in the fillern eck
when warm, there is enough coolant in expan-
sion tank ;.
XIf necessary ,add coolant that has been tested
and approved by Mercedes-Benz.
XReplace cap :and turn it clockwise as far as
it wil lgo.
For further information on coolant, see
(
Ypage 347).
Adding washe rfluid to the windshield
washe rsystem
XTo open: pullcap : upwards by the tab and
open.
XAdd the premixed washer fluid.
XTo close: press cap :onto the fillern eck
until it engages.
If the washer flui dlevel drops belowt he recom-
mended minimum of 1liter, amessag eappears
in the multifunction display prompting you to
add washer flui d(
Ypage 245).
Further information on windshield washer fluid/
antifreeze (
Ypage 348).
ASSYST PLUS
Servic emessage
The ASSYST PLUS service interval display
informs you of the next service due date.
290ASSYST PLUS
Maintenancea nd care

Information on the type of service and service
intervals (see the separate Maintenance Book-
let).
You can obtain further information from an
authorized Mercedes-Benz Center or at
http://www.mbusa.com (USA only).
iThe ASSYST PLUS service interval display
does not show any information on the engine
oil level.O bserve the notes on the engine oil
level (
Ypage 288).
The multifunction display shows aservice mes-
sage for several seconds, e.g.:
RService AinXXD ays
RServiceADue
RService AOverdue by XX Days
Depending on the operating conditions of the
vehicle,t he remaining time or distance until the
next service due date is displayed.
The letter A
orB,possibly in connection with a
number or another letter, indicates the type of
service. A
stands for aminor service and Bfor a
major service.
You can obtain further information from an
authorized Mercedes-Benz Center.
The ASSYST PLUS service interval display does
not take into account any periodsoft ime during
which the battery is disconnected.
Maintaining the time-dependent service sched-
ule:
XNote down the service due date displaye din
the multifunction display before disconnect-
ing the battery.
or
XAfter reconnecting the battery, subtract the
battery disconnection periodsf rom the ser-
vice date shown on the display.
Hiding aservicem essage
XPress the aor% button on the steering
wheel.
Displaying servic emessages
XSwitch on the ignition.
XUse ò on the steering wheel to call up the
list of menus.
XPress 9or: on the steering wheel to
select the Servicemenu and confirm with
a.
XPress 9or: on the steering wheel to
select the ASSYST PLUSsubmenu and con-
firm with a.
The service due date appears in the multi-
function display.
Information about Service
Resetting the ASSYST PLUS service
interval display
!If the ASSYST PLUS service interval display
has been inadvertently reset, this setting can
be corrected at aqualifieds pecialist work-
shop.
Have service work carried out as describedi n
the Maintenance Booklet. This may otherwise
leadtoi ncreased weara nd damage to the
major assemblies or the vehicle.
Aq ualifieds pecialist workshop, e.g. an author-
ized Mercedes-Benz Center, wil lreset the
ASSYST PLUS service interval display after the
service work has been carried out. You can also
obtain further information on maintenance
work, for example.
Special servic erequirements
The specifiedm aintenance interval takes only
the normal operation of the vehicle into
account. Under arduous operating conditions or
increased load on the vehicle,m aintenance
work must be carried out more frequently, for
example:
Rregular city driving with frequent intermediate
stops
Rif the vehicle is primarily used to travel short
distances
Ruse in mountainou sterrain or on poor road
surfaces
Rif the engine is often left idling for long periods
Under these or similar conditions, have, for
example ,the air filter, engine oil and oil filter
replaced or changed more frequently. Under
arduous operating conditions, the tires must be
checked more often. Further information can be obtained at aqualifieds pecialist workshop, e.g.
an authorized Mercedes-Benz Center.
ASSYST PLUS291
Maintenancea nd care
Z

Drivingabroad
An extensive Mercedes-Ben zService networ kis
also available in other countries. You can obtain
further information from any authorized
Mercedes-Ben zCenter.
Car e
General notes
HEnvironmental not e
Dispose of empty packagin gand cleanin g
cloths in an environmentally responsible man -
ner.
!Fo rc leanin gyour vehicle, do no tuse any of
th ef ollowing:
Rdry, rough or har dcloths
Rabrasiv ecleanin gagents
Rsolvents
Rcleanin gagents containin gsolvents
Do no tscrub .
Do no ttou ch th esurfaces or protective films
wit hh ardo bjects ,e.g.a ringori cescraper.
You could otherwise scratch or damage th e
surfaces and protective film.
!Do no tparkt he vehicle fo ranextende d
period straight after cleanin git,particularly
after havin gcleaned th ewheels wit hwhee l
cleaner. Wheel cleaners could cause
increase dcorro sion of th ebrake discs and
brake pads/linings. Fo rthisr eason ,you
should drive fo rafewminutes after cleaning.
Brakin gheat sthe brake discs and th ebrake
pads/linings, thus drying them. The vehicle
can then be parked.
Regular car eofyour vehicle is aconditi on for
retainin gthe qualit yint he longterm.
Use car eproducts and cleanin gagents recom -
mended and approved by Mercedes-Benz.
Washing th evehicle an dcleaning th e
paintwor k
Automatic car was h
GWARNING
Brakin gefficiency is reduce dafter washin g
th ev ehicle. There is ariskofana ccident.
Afte rthe vehicle has bee nwashed, brake
carefully whil epayin gattenti on to th etraffic
condition suntil full braking powe risrestored .
!If DISTRONIC PLU SortheHOLD function is
activated, th evehicle brake sautomatically in
certain situations.
To preven tdamage to th evehicle, deactivat e
DISTRONIC PLU Sand th eHOLDf unction in
th ef ollowin goro ther similar situations:
Rwhen towin gthe vehicle
Rin th ecar wash
!Never clean your vehicle in aTouchless
Automatic Car Wash as these use special
cleanin gagents .These cleanin gagents can
damage th epaintwor korplasticparts .
!Mak esuret hat:
Rthes idew indows and th eslidin gsunroof
are full yclosed.
Rth ev entilation/heatin gisswitched of f(th e
OF Fb utto nhas bee npressed).
Rthew indshield wipe rswitch is at position 0.
Rthe3 60°c amera or rea rviewc amera is
switched off.
The vehicle may otherwise be damaged .
!If theSmartKey is within th ereard etection
range of KEYLESS-GO ,the followin gsitua-
tions, fo rexample, could lead to th euninte
n
-
tional opening of th etrunk :
Rusin gac ar wash
Rusingap owerwasher
Mak esuret hatthe SmartKey is at leas t10ft
(3 m) away from th evehicle.
!Mak esuret hatthe automatic transmissio n
is in neutral position Nwhen washin gyour
vehicle in atow-throu gh car wash .The vehicle
may otherwise be damaged .
ROperatingwitht he SmartKey:
Do no tremov ethe SmartKey from th eigni-
tion lock. Do no topent he driver's doo r
292Care
Maintenance an dcare

when theengine is switche doff or at very
low speeds.O therwise, when in transmis-
sion position Dor Rthea utomatic trans-
mission will automatically switch to park
position Pand blockt hewheels.
ROperatin gwith th eStart/Stop button:
Do not open th edriver's door when the
engine is switche doff or at veryl ow
speeds.O therwise, when in transmission
position Dor Rth ea utomatic transmission
will automatically switch to park position P
and blockt hewheels.
Observe th efollowing to makes ure that the
automatic transmission stays in position Nneu-
tral:
Operatin gwith th eSmartKey and th eStart/
Stop button:
XMake sure that th eignitio nisswitche don.
XMake sure that th evehicle is stationary.
XDepress and hold th ebrakep edal.
Operatin gwith th eStart/Stop button only:
XEngage park position P.
XRelease thebrakep edal.
XRemoveS tart/Stop button fromi gnitionlock
(Ypage 131).
XInsert th eSmartKey int othe ignitio nlock.
XSwitch on th eignition.
XDepress and hold th ebrakep edal.
Operatin gwith th eSmartKey and th eStart/
Stop button:
XShif tton eutral N.
XRelease th ebrakep edal.
XRelease th eelectric parking brake, if neces-
sary.
XSwitch off th eignitio nand leave th eSma rtKey
in th eignitio nlock.
You can wash th evehicle in an automatic car
wash fromt heverys tart.
If th evehicle is veryd irty, pre-wash it bef

ore
cleaning it in an automatic car wash.
After using an automatic car wash, wipe off wax
fromt hewindshield and th ewiper blades. This
will prevent smearsa nd reducewiping noises
caused by residue on th ewindshield.
Washing by hand
In some countries, washingbyh and is only
allowed at specially equipped washingb ays.
Observe th elegal requirements in each country.
XDo not use hot water and do not wash the
vehicle in directs unlight.
XUseasofts ponge to clean.
XUse amild cleaning agent, such as acar
shampoo approved by Mercedes-Benz.
XThoroughly hose down th evehicle with agen-
tle jet of water.
XDo not pointt hewater jet directly towards the
air inlet.
XUse plenty of water and rinse out th esponge
frequently.
XRinse th evehicle with clean water and dry
thoroughly with achamois.
XDo not let th ecleaning agentd ry on thepaint-
work.
Carefull yremove all deposits of road salt as
soon as possible when driving in winter.
Power washers
GWARNING
The water jet fromac ircular jet nozzle (dirt
blasters) can cause invisible exterior damage
to th etires or chassis components. Compo-
nents damaged in this way may fail unexpect-
edly. Thereisar isk of an accident.
Do not use power washersw ith circular jet
nozzles to clean th evehicle. Have damaged
tires or chassis component sreplaced imme-
diately.
!Always maintain adistanc eofatl east
11.8 in (30 cm) between th evehicle and the
power washer nozzle. Information about the
correctd istanceisavailable fromt heequip-
mentm anufacturer.
Move th epower washer nozzle aroundw hen
cleaning your vehicle.
Do not aim directly at any of th efollowing:
Rtires
Rdoor gaps, roof gaps, joints, etc.
Relectrical components
Rbattery
Rconnectors
Care293
Maintenance and care
Z

Rlights
Rseals
Rtrim
Rventilation slots
Damaged seals or electrical component scan
lead to leaks or failures.
!If the SmartKey is within the rear detection
rang eofK EYLESS-GO, the followings itua-
tions, for example, could lead to the uninten-
tional opening of the trunk:
Rusing acar wash
Rusing apower washer
Make sure that the SmartKey is at least 10 ft
(3 m) away fromt he vehicle.
!Edition1special model: partsofy our vehi-
cle are covered with adecorative foil. Main-
tain adistanc eofatl east 70 cm betwee nthe
foil-wrapped partsoft he vehicle and the noz-
zle of the high pressure cleaner.
Information about the correctd istanceis
available fromt he equipmentm anufacturer.
Move the power washer nozzle around when
cleaning your vehicle.
Cleaning th epaintwork
!Do not affix:
Rstickers
Rfilms
Rmagnetic plates or similar items
to painted surfaces. You could otherwise
damage the paintwork.
Scratches, corrosived eposits, areas affected by
corrosiona nd damage caused by inadequate
care cannot always be completely repaired. In
such cases ,visit aqualified specialist workshop.
XRemove dirt immediately, where possible,
while avoidingr ubbingtoo hard.
XSoak insect remainsw ith insect remover and
rinse off the treated areas afterwards.
XSoak bird droppings with water and rinse off
the treated areas afterwards.
XRemove coolant, brakef luid, tree resin,oils,
fuels and greases by rubbingg ently with a
clot hsoaked in petroleum ether or lighter
fluid.
XUse tar remover to remove tar stains.
XUse silicone remover to remove wax. If water no longer forms "beads" on the paint
surface, use the paint care products recommen-
ded and approved by Mercedes-Benz. This is the
case approximately everyt
hree to five months,
depending on the climat econdition sand the
care productu sed.
If dirt has penetrate dthe paint surfaceorift he
paint has becom edull, the paint cleaner recom-
mended and approved by Mercedes-Benz
should be used.
Do not use these care products in the sun or on
the hood while the hood is hot.
XUse asuitable touch-up stick, e.g. MB Touch-
Up Stick ,torepair slight damage to the paint-
work quickly and provisionally.
Matte finish care
!Never polish the vehicle or the light alloy
wheels. Polishingc auses the finish to shine.
!The followingmay cause the paint to
becom eshinya nd thus reducet he matte
effect:
Rstrong rubbingoft he paintwork with
unsuitable materials
Rfrequent use of automatic car washes
Rwashing the vehicle in directs unlight
!Never use paint cleaner, buffingorp olishing
products, or gloss preserver,e .g. wax. These
products are only suitable for high-gloss sur-
faces. Their use on vehicles with matt efinish
leads to considerable surfaced amage (shiny,
mottled areas).
Always have paintwork repairs carried out at a
qualified specialist workshop.
!Do not use wash programs with ahot wax
treatment under any circumstances.
Observe these notes if your vehicle has aclear
matt efinish. This will help you to avoid damage
to the paintwork due to incorrect treatment.
These notes also apply to light alloy wheels with ac lear matt efinish.
The vehicle should preferably be washed by
hand using asoft sponge, car shampooa nd
plent yofw ater.
Use only insect remover and car shampoof rom
the rang eofapproved Mercedes-Ben zcare
products.
294Care
Maintenance and care