2017 MERCEDES-BENZ C-Class COUPE coolant level

Centrallocking
Locking/unlockin g(SmartKey) ........ 74
Changing bulbs
High-beam headlamps .................. .115
Low-beam headlamps .................... 115
Turn signals (front) ......................... 115
Changing the media source ............. 208
Charge-air pressure (on-board
computer, Mercedes-AMG vehi-
cles) .................................................... 216
Child
Restraint system .............................. 58
Child seat
Forward-facing restraint system ...... 61
LATCH-typ e(ISOFIX) chil dseat
anchors ............................................ 59
On the front-passenger seat. ........... 60
Rearward-facing restraint system .... 60
Top Tether ....................................... 59
Children
Specia lsea tb eltr etractor ............... 57
Cigarette lighter ................................ 275
Cleaning
Mirror turn signal ........................... 296
Climate control
Control panel for dual-zone auto-
mati cclimate control ..................... 121
Controlling automaticall y............... 123
Cooling with ai rdehumidifica tion .. 123
Cooling with ai rdehumidifica tion
(multimedia system) ...................... 263
Defrosting the window s................. 125
Defrosting the windshield .............. 124
ECO start/stop function (3-zone
automatic climate control )............. 122
Genera lnotes ................................ 120
Indicato rlam p................................ 123
Ionization ....................................... 128
Ionization (multimedia system) ...... 263
Note sonu sing the automatic cli-
mate control .................................. 121
Overview ........................................ 262
Overview of systems ...................... 120
Perfum eatomize r.......................... 126
Perfum eatomize r(multimedia
system) .......................................... 263
Problem with the rea rwindow
defroster ........................................ 126 Problems with cooling with air
dehumidification
............................ 123
R

efrigerant ..................................... 348
Refrigerant filling capacity ............. 349
Setting the ai rdistribution ............. 124
Setting the ai rvents ...................... 128
Setting the airflow ......................... 124
Setting the climate mod e(multi-
media system) ............................... 263
Setting the temperature ................ 124
Switching air-recirculation mode
on/of f............................................ 126
Switching on/of f........................... 122
Switching the rea rwindow
defroster on/of f............................ 125
Switching the synchronization
function on and off ........................ 124
Synchronization function (multi-
media system) ............................... 263
Climate controls ettings
Multimedia system ........................ 262
Climate controls ystem
Climate control (3-zone automatic
climate control )............................. 122
Cockpit
Overview .......................................... 33
COLLISIO NPREVENTION ASSIST
PLUS
Activating/deactivating ................. 212
Displa ymessage ............................ 225
Operation/note s.............................. 64
COMAND display
Cleaning ......................................... 297
Combination switch .......................... 111
Connecting aUSB device
see also Digital Operator's Man-
ua l.................................................. 258
Consumptions tatistics (on-board
computer) .......................................... 205
Controller ........................................... 259
Convenience closin gfeature .............. 88
Convenience opening feature ............ 88
Coolant (engine)
Checking the level ......................... 290
Displa ymessage ............................ 232
Filling capacity ............................... 348
Important safety notes .................. 347
6Index

Type identificationplate
see Vehicl eide ntificatio nplate
U
Unlocking
Emergency unlocking ....................... 82
From insid ethe vehicl e(central
unlocking button) ............................. 81
US Bd evices
Connecting to the Media Inter-
face ...............................................2 67
V
Vanity mirror (in the sun visor)........275
Vehicle
Correct use ...................................... 29
Data acquisition ............................... 30
Display message ............................ 243
Equipment ....................................... 26
Individua lsettings .......................... 211
Limited Warranty .............................3 0
Loading .......................................... 326
Locking (in an emergency) ............... 82
Locking (SmartKey) .......................... 74
Lowering ........................................ 340
Maintenance .................................... 27
Operating safety .............................. 28
Parking .......................................... 152
Parking for along period. ............... 155
Pulling awa y................................... 134
Raising ........................................... 337
Reporting problems ......................... 29
Securing from rolling away ............ 336
Towing away .................................. 310
Transporting .................................. 312
Unlocking (i nanemergency) ........... 82
Unlocking (SmartKey )...................... 74
Vehicl edata. .................................. 349
Vehicl edata
Roof load (maximum) ..................... 349
Trunk load (maximum) ................... 349
Vehicl edimensions ........................... 349
Vehicl eemergencyl ocking ................ 82
Vehicl eidentificatio nnumber
see VIN
Vehicl eidentificatio nplate .............. 343 Vehicl
elevel
AIRMATIC. ..................................... 172
Displa ymessage ............................ 236
Vehicl etoolkit.................................. 300
Video
Operating the DVD ......................... 209
see also Digital Operator's Man-
ual.................................................. 258
VIN
Seat. .............................................. 344
Type plate ...................................... 343
Voice ControlS ystem
see Separate operating instructionsW
Warning and indicator lamps ABS ................................................ 249
Brakes ........................................... 248
Check Engine ................................. 252
Coolant .......................................... 253
Distance warning ........................... 255
ESP
®.............................................. 249
ESP®OFF ....................................... 251
Fue ltank ........................................ 252
Genera lnotes ................................ 246
Overview .......................................... 34
Parking brake ................................ 252
PASSENGER AIR BAG ...................... 42
Reserve fue l................................... 252
Restraint system ............................ 252
Seatb elt. ....................................... 247
SPOR Thandling mod e................... 251
Steering ......................................... 257
Tire pressure monitor .................... 256
Warranty .............................................. 26
Washer fluid
Displa ymessage ............................ 245
Wheel and tire combinations
Tires ............................................... 340
Wheel bolt tightenin gtorque ........... 340
Wheel chock ...................................... 336
Wheels
Changing awheel .......................... 335
Checking ........................................ 317
Cleaning ......................................... 295
Important safety notes .................. 316
Information on driving .................... 316
Index21

Problems with the engine
ProblemPossible causes/consequences andMSolutions
The engine does not
start. The starter motor
can be heard.RThere isamalfunction in the engine electronics.
RThere is amalfunction in the fuel supply.
Before attempting to start the engine again:
XTurn the SmartKey back to position 0in the ignition lock.
or
XPress the Start/Stop button repeatedly until all indicator lamps in
the instrumentc luster go out.
XTry to start the engine again (Ypage 133). Avoid excessively long
and frequent attemptstos tart the engine as these will drain the
battery.
If the engine does not start after several attempts:
XConsult aqualified specialist workshop.
The engine does not
start. You cannot hear
the starter motor.The on-board voltage is too low because the battery is too weak or
discharged.
XJump-start the vehicle (Ypage 308).
If the engine does not start despite attempt stojump-start it:
XConsult aqualified specialist workshop.
The starter motor was exposed to athermal load that was too high.
XTry to start the engine again (Ypage 133).
If the engine still does not start:
XConsult aqualified specialist workshop.
The engine is not running
smoothly and is misfir-
ing.There is amalfunction in the engine electronics or in amechanical
componentoft he engine management system.
XOnly depress the accelerator pedal slightly.
Otherwise, non-combusted fuel may get into the catalytic converter
and damage it.
XHave the cause rectified immediately at aqualified specialist work-
shop.
The coolant temperature
gauge shows avalue
above 248 ‡(120 †).The coolant level is too low. The coolant is too hot and the engine is no
longer being cooled sufficiently.
XStop as soon as possible and allow the engine and the coolant to
cool down.
XCheck the coolant level (Ypage 290). Observe the warning notes
as you do so and add coolant if necessary.
138Driving
Driving and parking

Tachometer
!
Do not drive in the overrevving range ,asthis
could damage the engine.
The red band in the tachometer indicates the
engine's overrevving range.
The fuel supply is interrupte dtoprotect the
engine when the red band is reached.
Outside temperature display
Yo us houl dpayspecial attentio ntoroadc ondi-
tions when temperatures ar earound freezing
point.
Bea rinm indt hatt he outside temperatur edis-
play indicates the temperatur emeasured and
does not record the roa dtemperature.
The outside temperatur edisplay is in the multi-
functio ndisplay (
Ypage 202).
Changes in the outside temperatur earedis-
played after ashort delay.
Coolant temperature display
GWARNING
Opening the hoo dwhent he engine is over-
heate dorw hent here is afireint he engine
compartment could expose yo utohot gases
or othe rservic eproducts. There is arisko f
injury.
Let an overheate dengine coo ldow nb efore
opening the hood. If there is afireint he
engine compartment, kee pthe hoo dclosed
and contact the fir edepart ment.
!Adisplay message is shown if the coolant
temperatur eistoo high.
If the coolant temperatur eisover2 48 ‡
(12 0† ),do not continue driving. The engine
will otherwis ebedamaged .
The coolant temperatur edisplay is in the lower
sectio nofthe tachometer (
Ypage 34).
Under normal operating conditions and with the
specifie dcoolant level ,the coolant temperature
mayr iseto2 48‡(120† ).
Operatin gthe on-board computer
:Multifunctio ndisplay
;Right contro lpan el
=Lef tcontro lpan el
XTo activate the on-board computer: turn
the SmartKeytop osition1in the ignition lock.
Yo uc an contro lthe multifunctio ndisplay and
the settings in the on-board compute rusing the
buttons on the multifunctio nsteerin gwheel .
Left contro lpanel
òROpens the menu list
9
:Press briefly:
RScrolls in lists
RSelects amenu or function
RIn the RadioorMediamenu:
opens the track or statio nlista nd
selects astation, an audi otrack or
av ideo scene
RIn the Telephonemenu:switches
to the phone book and selects a
nam eorat elephon enumber
9
:Press and hold:
RScrolls quickl ythroug halllists
RIn the RadioorMediamenu:
selects astation, audi otrack or
video scene using rapi dscrolling
RIn the Telephonemenu:starts
rapi dscrolling if the phone book is
open
Displays an doperation201
On-boa rd computera nd displays
Z

Display messagesPossible causes/consequences andMSolutions
Adaptive HighbeamAssist InoperativeAdaptive HighbeamAssistisf aulty.
XVisit aqualified specialist workshop .
Adaptive HighbeamAssist CurrentlyUnavailable SeeOperator'sManual
Adaptive Highbea mAssistisd eactivated and temporarily inoperative.
Possibl ecauses are:
Rthew indshield in th ecamera' sfield of vision is dirty.
Rvisibilit yisimpaire ddue to heav yrain ,sno worf og.
XClean th ewindshield.
If th esystem detects that th ecamera is full yoperational again ,the
Adaptive
HighbeamAssistNowAvailablemessage is displayed.
Adaptive Highbea mAssistiso perational again .
Engine
Display messagesPossible causes/consequences and MSolutions
+
CheckCoolantLevelSee Operator' sMan‐ual
The coolan tlevel is to olow.
!Avoid making lon gjou rneys wit htoo littl ecoolan tint heengin e
coolin gsystem. The engin ewill otherwise be damaged.
XAddc oolant, observing th ewarning note sbefore doin gso
(Ypage 290).
If you have to ad dcoolant frequently:
XContac taqualified specialist workshop and hav ethe engin ecooling
system checked.
?The fan motor is faulty.
XAt coolan ttem peratures belo w248‡(120 †), drive to the nearest
qualified specialist workshop.
XAvoid heavy loads on the engine as you do so, e.g. driving in moun-
tainou sterrai nand stop-and-go traffic.
232Display messages
On-board computer and displays

Display messagesPossible causes/consequences andMSolutions
?
CoolantToo HotStopVehicl eTurnEngine Off
The coolan tistoohot .
Aw arning tone also sounds.
GWARNIN G
Do no tdrive when your engin eisoverheated. This can caus esom e
fluids whic hmay hav eleaked int othe engin ecom partmen ttocatch
fire.
Steam from th eoverheate denginec an also caus eserious burn swhich
can occur jus tbyopening th ehood.
There is ariskofi njury.
XPull ove rand stop th evehicl esafely and switch off th eengine, pay-
ing attention to roa dand traffic conditions.
XSecur ethe vehicl eagainst rollin gaway (Ypage 152).
XWait until th eengineh as cooled down .
XMakesuret hatthe air supply to th eenginer adiato risnotblocked,
e.g. by snow, slus horice.
XDo no tstart th eenginea gain until th edisplay message goe sout and
th ec oolan ttem perature is belo w248‡(120† ). Otherwise ,the
engin ecould be damaged.
XPay attention to th ecoolan ttem perature display.
If th etemperatur eincreases again:
XVisit aqualified specialist workshop immediately.
Under normal operating condition sand wit hthe specified coolan t
level, th ecoolan ttem perature may ris eto2 48 ‡(120† ).
#
See Operator' sMan‐ual
The battery is no tbein gcharged.
Aw arning tone also sounds.
Possibl ecauses are:
Rad efective alternato r
Ratornp oly-V-belt
Ram alfunction in th eelectronics
!Do no tcontinue driving. The engin ecould otherwise overheat.
XPull ove rand stop th evehicl esafely and switch off th eengine, pay-
ing attention to roa dand traffic conditions.
XSecur ethe vehicl eagainst rollin gaway (Ypage 152).
XConsult aqualified specialist workshop .
Display messages233
On-boardc omputer andd isplays
Z

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