2017 MERCEDES-BENZ C-Class COUPE coolant temperature

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

Start/Stop buttonStarting the engine ........................ 133
Start/stop function
see ECO start/stop function
Starting (engine) ................................ 133
STEER CONTROL ..................................7 2
Steering
Display message ............................2 45
Warning lamps ............................... 257
Steering Assist and Stop&Go Pilot
(DISTRONI CPLUS)
Display message ............................ 240
Steering assistant STEE RCON-
TROL
see STEER CONTROL
Steering wheel
Adjusting (electrically). .................. 104
Adjusting (manually). ..................... 103
Butto noverview ............................... 35
Buttons (on-board computer) ......... 201
Cleaning ......................................... 297
EASY ENTRY/EXI Tfeature ............. 105
Important safety notes .................. 103
Steering wheelh eating .................. 104
Storing settings (memory func-
tion) ............................................... 109
Steering whee lheating
Problem (malfunction) ................... 105
Switching on/of f........................... 104
Steering whee lpaddle shifters ........ 146
Stopwatch (RACETIMER) ................... 217
Stowag eareas ................................... 268
Stowag ecom partments
Armrest (under )............................. 269
Center console .............................. 269
Cu ph olders ................................... 274
Door ............................................... 270
Eyeglasses compartment ............... 269
Glove box ....................................... 269
Important safety information ......... 268
Mapp ockets .................................. 270
Stowag enet ................................... 270
see Stowag eareas
Stowag enet....................................... 270
Stowag ewellb enea th the trunk
floor .................................................... 273 Summert
ires
In winter ........................................ 318
Sun visor ............................................ 274
Suspension setting
AIRMATIC. ..................................... 173
AMG adaptive sport suspension
system ........................................... 173
Suspension settings
SETUP (on-board computer) .......... 216
Switchin gair-recirculatio nmode
on/o ff
................................................. 126
Sw

itchin gonm ediam ode
Via the device list .......................... 266
T
Tachometer ........................................ 201
Tail lamps
Displa ymessage ............................ 231
see Lights
Tank content
Fuelgauge ....................................... 34
Technical data
Capacities ...................................... 344
Information .................................... 342
Tires/wheels ................................. 340
Vehicl edata. .................................. 349
Telephone
Accepting acall( multifunction
steering wheel) .............................. 210
Authorizing amobilephone (con-
necting) ......................................... 265
Connecting amobilephone (gen-
era linformation) ............................ 265
Displa ymessage ............................ 245
Introduction ................................... 210
Menu (on-board computer) ............ 210
Numbe rfrom the phone boo k........ 210
Redialing ........................................ 211
Rejecting/ending acall. ................ 210
see also Digital Operator's Man-
ua l.................................................. 258
Switching between mobile
phones ........................................... 266
Temperature
Coolant (displa yinthe instrument
cluster) .......................................... 201
18Index

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

Warning/
indicator
lampNSignal type
Possiblec auses/consequences and M
Solutions
8NThe yellow reserve fuel warning lamp flashes while the vehicleisinm otion.
In addition, the ;Check Engine warning lamp may light up.
The fuel filler cap is not closed correctly or the fuel system is leaking.
XCheck that the fuel filler cap is correctly closed.
XIf the fuel filler cap is not correctly closed: close the fuel filler cap.
XIf the fuel filler cap is closed:visitaqualified specialist workshop.
?NThe red coolant warning lamp lights up while the engine is running and the
coolant temperature gauge is at the start of the scale.
The temperature sensor for the coolant temperature gage is defective.
The coolant temperature is no longer being monitored .There is arisk of engine
damage if the coolant temperature is too high.
XPul lover and stop the vehicles afelyand switch off the engine, paying attention
to road and traffic conditions. Do not continue driving under any circumstances.
XSecure the vehiclea gainst rolling away(Ypage152).
XConsult aqualified specialist workshop.
Warning and indicator lamps in the instrument cluster253
On-board computer and displays
Z

Warning/
indicator
lampNSignal type
Possiblec auses/consequences and M
Solutions
?NThe 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 cooleds ufficiently.
XObserve the additionaldisplay messages in the multifunction display.
XPul lover and stop the vehicles afelyand switch off the engine, paying attention
to road and traffic conditions.
XSecure the vehiclea gainst rolling away(Ypage152).
XLeave the vehiclea nd keepasafe distance from the vehicleu ntil the engine has
cooledd own.
XCheck the coolant leve land add coolant, observing the warning notes
(Ypag e290).
XIf you have to add coolant frequently, have the engine cooling system checked.
XMake sure that the air supply to the engine radiator is not blocked ,e.g. by snow,
slush or ice.
XDo not start the engine again until the coolant temperature is below 248 ‡
(120 †). Otherwise, the engine coul dbedamaged.
XDrive to the neares tqualified specialist workshop.
XAvoid heavy loads on the engine as you do so, e.g. driving in mountainous terrain
and stop-and-go traffic.
?NThe red coolant warning lamp comes on while the engine is running. Awarning
tone als osounds.
The coolant temperature has exceeded2 48‡(120 †). The airflow to the engine
radiator may be blocked or the coolant leve lmay be too low.
GWARNING
The engine is not being cooleds ufficiently and may be damaged.
Do not drive whe nyoure ngine is overheated. This can cause some fluids which
may have leaked into the engine compartment to catch fire.
Steam from the overheated engine can also cause serious burns which can occur
just by opening the hood.
There is arisk of injury.
XObserve the additiona ldisplaym essages in the multifunction display.
XPullover and stop the vehicle safely and switch off the engine, paying attention
to road and traffic conditions.
XSecure the vehicle against rolling away (Ypag e152).
XLeav ethe vehicle and keep asafe distance from the vehicle until the engine has
coole ddown.
XCheck the coolant leve land add coolant, observing the warning notes
(Ypag e290).
XIf you have to add coolant frequently, have the engine cooling system checked.
XMake sure that the ai rsupply to the engine radiator is not blocked, e.g. by snow,
slush or ice.
254Warning and indicator lamps in the instrument cluster
On-board computer and displays

Warning/
indicator
lampNSignal type
Possiblec auses/consequences and M
Solutions
XAt coolant temperatures below 248 ‡(120 †), drive to the neares tqualified
specialist workshop.
XAvoid heavy loads on the engine as you do so, e.g. driving in mountainous terrain
and stop-and-go traffic.
Driving systems
Warning/
indicator
lampNSignal type
Possiblec auses/consequences and M
Solutions
·NThe red distance warning lamp lights up while the vehicleisinm otion.Awarning
tone als osounds.
You are approaching avehicle, apedestrian or astationary obstacl einyourline of
travel at too high aspeed.
XBe prepared to brake immediately.
XPay carefu lattention to the traffic situation. You may have to brake or take
evasive action.
Further information on PRE ‑SAFE
®Brake (Ypage70).
For further information about the distance warning function of COLLISION PRE-
VENTION ASSIST PLUS, see (
Ypag e64).
Warning and indicator lamps in the instrument cluster255
On-board computer and displays
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