2017 MERCEDES-BENZ C-Class COUPE engine

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

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

Cleaning themirror turn signals
!Only use cleanin gagents or cleanin gcloths
that are suitable for plastic lenses.U nsuitable
cleanin gagents or cleanin gcloth scould
scratch or damag ethe plastic lenses of the
mirror tur nsignals.
XClean th eplastic lenses of th emirror tur nsig-
nals in th eexteri or mirror housing usingaw et
sponge and mild cleanin gagent, e.g.
Mercedes-Ben zcar shampoo or cleaning
cloths.
Cleaning th esensors
!If you clean th esensorsw ithapower
washer, mak esure that you keep adistance
of at least 11.8 in (30 cm)between the vehicl e
and th epower washer nozzle. Information
about th ecorrec tdistanc eisavailabl efrom
th ee quipment manufacturer.
XClean sensors :of th edriving systems with
water, car shampoo and asoftc loth.
Cleaning th erearv iew camera and 360°
camera
!Do no tclean th ecamera lensa nd thearea
aroun dthe rear view camera or 360°camera
with ahigh-pressurew aterjet.
XMakes ure that th evehicle is stationar yand
that th eSmartKey is in position 2in th eigni-
tio nlock.
XOpen th ecamera cover for cleanin gvia the
multimedia system (see th eseparate operat-
ing instructions).
XTo clean th ecamera: use clean wate rand a
softc loth to clean camera lens :.
360°camera: if you driveatspeeds above
20 mph (30 km/h) or with th eSma rtKey in posi-
tion 0or 1in th eignition lock, th ecover of the
360° camera closes automatically.
Cleaning th eexhaust pipes
GWARNING
The exhaust tail pipe and tail pipe trim can
become ver yhot.Ify ou com eintoc ontact
with these part softhevehicle ,you coul dburn
yourself. Thereisar isk of injury.
Always be particularly careful aroun dthe
exhaust tail pipe and th etail pipe trim. Allow
these component stocooldown before touch-
ing them.
!Do no tclean th eexhaust pipe with acid-
based cleanin gagents ,suchasb athroom
cleaner or wheel cleaner.
!Mercedes-AM Gvehicle swith black exhaust
pipes:t heblack-chrome tailpipe finishers
shouldn otbe polished with achrom epolish.
They will otherwise lose their black sheen. For
optimal care, th efaceplates shouldber ubbed
with alightly oiled cloth after everyc ar wash.
Commercially availabl eengine and car eoils
are suitable for this.
For heavier soiling, you can apply afinep aint-
work polishw itham icrofiber cloth .Remove
th ee xcess polishr esidue after polishing.
296Care
Maintenance and care

XSwitch off the engine.
XRemove the SmartKey from the ignition lock.
or, in vehicles with KEYLESS-G Ostart-function
or KEYLESS ‑GO
XOpenthe driver' sdoor.
The on-board electronics now have status 0.
Thi sist he same as the SmartKey having been
removed.
XRemove the Start/Sto pbutton from the igni-
tion lock (Ypage 131).
XMake sure that the engine canno tbes tarted
via your smartphone (Ypage 134).
XMake sure that the passenger sare not endan-
gered as they do so. Make sure that no one is neart he danger are awhile awheel is being
changed .Anyone wh oisnot directl yassisting
in the wheel change should, for example,
stand behind the barrier.
XGe toutof the vehicle. Paya ttention to traffic
conditions when doing so.
XClose the driver' sdoor.
MOExtended tires( tires with run-flat
properties)
General notes
With MOExtended tire s(tires with run fla tchar-
acteristics) ,you can continu etodrive your vehi-
cle eve nifthere is atotal loss of pressure in one
or more tires. The affected tire mus tnot show
any clearl yvisible damage.
You can recognize MOExtended tire sbythe
MOExtended marking which appears on the
sidewal lofthe tire .You will find this marking
next to the tire size designation, the load-bear-
ing capacity and the speed index (
Ypage 330).
MOExtended tire smay only be used in conjunc-
tion with an active tire pressure loss warning
system or with an active tire pressure monitor.
If ap ressure loss warnin gmessage appears
in the multifunctio ndisplay:
Robserve the instructions in the display mes-
sages (Ypage 241).
Rcheck the tire for damage.
Rif driving on, observe the following notes.
The driving distance possible in run-flat mod eis
approximately 50 miles (80 km )whent he vehi-
cle is partiall ylad en. Whe nthe vehicl eisfully
laden it is approximately 19 miles (30 km). In addition to the vehicl
eload, the driving dis-
tance possible depends upon:
Rvehicl espeed
Rroa dcondition
Routsid etemperature
The driving distance possible in run-flat mode
may be reduce dbyextremedriving conditions
or maneuvers, or it can be increased through a
moderate style of driving.
The driving distance possible in run-flat mod
eis
co

unted from the moment the tire pressure loss
warning appears in the multifunction display.
You mus tnot excee damaximum speed of
50 mph (80 km/h).
Whe nreplacing one or al ltires, please observe
the following specifications for your vehicle's
tires:
Rsize
Rthe typ eand
Rthe "MOExtended" mark
If at ire hasg one flatand canno tbereplaced
with aMOExtended tire ,astandard tire may be
used as atemporary measure. Make sure that
yo uu sethe proper size and typ e(summer or
winter tire).
Vehicles equipped with MOExtended tire sare
not equipped with aTIREFIT kit at the factory. It
is therefore recommended that yo uaddit ionally
equip your vehicl ewithaT IREFIT kit if yo umount
tire sthat do not feature run-flat properties ,e.g.
winter tires. ATIREFIT kit may be obtaine dfrom
aq uali fied specialist workshop.
Important safety notes
GWARNING
Whe ndriving in emergency mode, the driving
characteristics deteriorate ,e.g. when corner-
ing, accelerating quickl yand when braking.
There is ariskofana ccident.
Do not excee dthe state dmaximum speed.
Avoi dabrup tsteering and driving maneuvers,
and driving ove robstacles (curbs ,potholes,
off-road). Thi sapplies in particula rtoaladen
vehicle.
Stop driving in emergency mod eif:
Ryouh earb anging noises.
Rthe vehicl estarts to shake.
Flat tire301
Breakdown assistance
Z

XPull the tire sealant bottle out of the tire infla-
tion compressor.
The filler hose remains attached to the tire
sealant bottle.
XDrive to the nearest qualified specialist work-
shop and have the tire changed there.
XHave the tire sealant bottle and the filler hosereplaced as soon as possible at aqualified
specialist workshop.
XHave the tire sealant bottle replaced every
four years at aqualified specialist workshop.
Battery (vehicle)
12 Vb attery –important safety notes
Special tools and expert knowledge are required
when working on the battery, e.g. removal and
installation .You should therefore have all work
involvin gthe battery carried out at aqualified
specialist workshop.
GWARNING
Work carried out incorrectly on the battery
can lead, for example, to ashort circuit and
thus damage the vehicle electronics. This can
lead to function restriction sapplying to
safety-relevant systems, e.g the lighting sys-
tem, the ABS (anti-loc kbraking system) or the
ESP
®(Electronic Stability Program). The oper-
ating safety of your vehicle may be restricted.
You could lose control of the vehicle, for
example:
Rwhen braking
Rin the event of abrupt steerin gmaneuvers
and/or when the vehicle's speed is not
adapted to the road conditions
There is arisk of an accident.
In the event of ashort circuit or asimilar inci-
dent, contact aqualified specialist workshop
immediately. Do not drive any further .You
should have all work involvin gthe battery car-
ried out at aqualified specialist workshop.
For further information about ABS and ESP
®,
see (Ypage 62) and (Ypage 67).
All vehicles except vehicles with alithium-
ion battery:
GWARNING
Electrostatic build-up can lead to the creation of sparks, which could ignite the highly explo-
sive gases of abattery. There is arisk of an
explosion.
Before handling the battery, touch the vehicle
body to remove any existin gelectrostatic
build-up.
The highly flammable gas mixture forms when
charging the battery as well as when jump-start-
ing.
Always make sure that neither you nor the bat-
tery is electrostatically charged. Abuild-up of
electrostatic charge can be caused, for exam-
ple:
Rby wearing clothin gmade from synthetic
fibers
Rdue to friction between clothin gand seats
Rif you push or pull the battery across the car-
pet or other synthetic materials
Rif you wipe the battery with acloth
GWARNING
During the charging process, abattery produ-
ces hydrogen gas. If ashort circuit occurs or
sparks are created, the hydrogen gas can
ignite. There is arisk of an explosion.
RMake sure that the positive terminal of a
connected battery does not come into con-
tact with vehicle parts.
RNever place metal object sortools on abat-
tery.
RIt is importan tthat you observe the descri-
bed order of the battery terminals when
connectin gand disconnectin gabattery.
RWhen jump-starting, make sure that the
battery poles with identical polarity are
connected.
RIt is particularly importan ttoobserve the
described order when connectin gand dis-
connectin gthe jumper cables.
RNever connect or disconnect the battery
terminals while the engine is running.
GWARNING
Battery acid is caustic. There is arisk of injury.
Battery (vehicle)305
Breakdown assistance
Z

Jump-starting
For the jump-starting procedure, use only the jump-starting connection point in the engine com-
partment,consisting of apositive terminal and aground point.
All vehiclese xcept vehiclesw ithalithium-ion battery:
GWARNING
Battery acid is caustic. There is arisk of injury.
Avoid contact with skin, eyes or clothing. Do not inhale any battery gases. Do not lean over the
battery. Keep children away from batteries. Wash away battery acid immediately with plenty of
clean water and seek medical attention.
GWARNING
During charging and jump-starting, explosive gases can escape from the battery. There is arisk
of an explosion.
Particularly avoid fire, open flames, creating sparks and smoking. Ensure there is sufficient ven-
tilation while charging and jump-starting. Do not lean over abattery.
GWARNING
During the charging process, abattery produces hydrogen gas. If ashort circuit occurs or sparks
are created, the hydrogen gas can ignite. There is arisk of an explosion.
RMake sure that the positive terminal of aconnected battery does not come into contact with
vehicle parts.
RNever place metal objects or tools on abattery.
RIt is important that you observe the described order of the battery terminals when connecting
and disconnecting abattery.
RWhen jump-starting, make sure that the battery poles with identical polarity are connected.
RIt is particularly important to observe the described order when connecting and disconnecting
the jumper cables.
RNever connect or disconnectt he battery terminals while the engine is running.
GWARNING
Ad ischarged battery can freeze at temperatures below freezing point. When jump-starting the
vehicle or charging the battery, gases can escape from the battery. There is arisk of an explosion.
Allow the frozen battery to thaw out before charging it or jump-starting.
If, at low temperatures, the indicator lamps/warning lamps in the instrument cluster do not light up,
it is highly likely that the discharged battery has frozen.Int his case, you may neither charge the
battery nor jump-start the vehicle. The service life of athawed-out battery may be shorter. The
starting characteristicsc an be impaired, particularly at low temperatures. Have the thawed-out
battery checked at aqualified specialist workshop.
All vehicles:
!Avoid repeated and lengthy starting attempts. Otherwise, the catalytic converter could be
damaged by the non-combusted fuel.
308Jump-starting
Breakdown assistance