2017 MERCEDES-BENZ C-Class COUPE fuel

Rthe front side windows arelower ed
Rvehicles with amemory function: the electri-
cally adjustable steering whee lisraised
Rthe engine is switched off and the fuel supply
is cut off
Rvehicles with mbrace :automatic emergency
call
Children in the vehicle
Important safety notes
Accident statistics sho wthatc hildren secured
in the rea rsea ts ar esafer thanc hildren secured
in the front-passenge rseat. For thisr eason,
Mercedes-Benz strongl yadvises thaty ouinstall
ac hild restraint systemonar ears eat. Children
ar eg enerall ybetter protecte dthere.
If ac hild younger thant welve yearsoldand
under 5ft(1.50 m)in height is travelingint he
vehicle:
Ralways secur ethe child in achild restraint
system suitable for Mercedes-Ben zvehicles.
The child restraint system must be appropri-
ate to the age, weight and size of the child
Rbe sure to observe the instructions and safety
notes in this section in addition to the child
restraint system manufacturer'si nstallation
instructions
Rbe sure to observe the instructions and safety
notes on the "Occupant classification system
(OCS)" (
Ypage 49)
GWARNING
If you leave children unsupervised in the vehi-
cle, the ycould set it in motion by, for example:
Rrelease the parking brake.
Rshift the automatic transmission out of the
parking position P.
Rstartthe engine.
In addition ,the ym ay operatev ehicle equip-
menta nd becom etrapped. There is arisk of
an accident and injury.
When leavingt he vehicle, always tak ethe
SmartKey with you and lock the vehicle. Never
leave children unsupervised in the vehicle.
GWARNING
If persons, particularly children are subjected to prolonged exposure to extreme heat or
cold, there is arisk of injury, possibly even
fatal. Never leave children unattended in the
vehicle.
GWARNING
If the child restraint system is subjected to
directs unlight, partsm ay get very hot.C hil-
dren may burn themselves on these parts,
particularly on the metal partsoft he child
restraint system. There is arisk of injury.
If you leave the vehicle, taking the child with
you, always ensure that the child restraint
system is not exposed to directs unlight. Pro-
tec titw ithablanket, for example. If the child
restraint system has been exposed to direct
sunlight, let it cool down befores ecuring the
child in it. Never leave children unattended in
the vehicle.
Always ensure that all vehicle occupant shave
their seat belts fastened correctly and are sitting
properly. Particular attention must be paid to
children.
Observe the safetyn otes on the seat belt
(
Ypage 43) and the notes on correctu se of seat
belts (Ypage 44).
Ab ooster seat may be necessary to achieve
proper seat belt positionin gfor children over
41 lbs (1 8kg)until the yreach aheight where a
three-point seat belt can be properly fastened
without abooster seat.
Specia lseat belt retractor
GWARNING
If the seat belt is released while driving, the
child restraint system will no longer be
secured properly. The special seat belt retrac- tor is disabled and the inertia real draws in a
portion of the seat belt. The seat belt cannot
be immediately refastened. There is an
increased risk of injury, possibly even fatal.
Stop the vehicle immediately, paying atten-
tion to road and traffic conditions. Reactivate
Children in th evehicle57
Safety
Z

SmartKey
Important safety notes
GWARNING
If children are left unsupervised in the vehicle,
they could:
Ropen the doors, thus endangering other
people or road users.
Rget out and disrupt traffic.
Roperate the vehicle's equipment.
Additionally, children could set the vehicle in
motion if, for example, they:
Rrelease the parking brake.
Rshifting the automatic transmission out of
park position P
RStart the engine.
There is arisk of an accident and injury.
When leaving the vehicle, always take the
SmartKey with you and lock the vehicle. Never
leave children or animals unattended in the
vehicle. Always keep the SmartKey out of
reach of children.
GWARNING
If you attach heavy or large object stothe
SmartKey, the SmartKey could be uninten-
tionally turned in the ignition lock. This could
cause the engine to be switched off. There is a risk of an accident.
Do not attach any heavy or large object stothe
SmartKey. Remove any bulky key rings before
insertingt he SmartKey into the ignition lock.
!Keep the SmartKey away from stron gmag-
netic fields. Otherwise, the remote control
function could be affected.
Strong magnetic fields can occur in the vicin-
ity of powerful electrical installations.
Do not keep the SmartKey:
Rwith electronic devices, e.g. amobile phone
or another SmartKey.
Rwith metallic objects, e.g. coins or metal foil.
Rinside metallic objects, e.g. ametal case.
This can affect the functionality of the Smart- Key. Vehicles with KEYLESS-GO startf
unction:do
not keep the SmartKey on the parcel shelf or in
the trunk.O therwise, the SmartKey may not be
detected, e.g. when startin gthe engine using
the Start/Stop button.
Ac heck which periodically establishes aradio
connection between the vehicle and the Smart-
Key determines whether avalid SmartKey is in
the vehicle. This occurs, for example:
Rwhen startin gthe engine
Rwhile driving
Rwhen the external door handles are touched
Rduring convenience closing
SmartKey functions
:& To lock the vehicle
;FTo open/close the trunk lid
=%To unlock the vehicle
XTo unlock centrally: press the%button.
If you do not open the vehicle within approx-
imately 40 seconds of unlocking:
Rthe vehicle is locked again.
Ranti-theft protection is reactivated.
XTo lock centrally: press the&button.
The SmartKey centrally locks and unlocks the
following components:
Rthe doors
Rthe trunk lid
Rthe fuel filler flap
The turn signals flash once when unlocking and
three times when locking.
You can also set an audible signal to confirm
that the vehicle has been locked. The audible
signal can be activated and deactivated via the
multimedia system (see the Digital Operator's
Manual).
74SmartKey
Opening and closing

KEYLESS-GOstartfun ction
Gene raln otes
Bear in min dthatthe engin ecan be started by
any of th evehicl eoccupant sifthere is aSmart-
Key in th evehicl e(
Ypage 133).
Changing th esettings ofthel ocki ng
system
You can chang ethe setting softhelocking sys-
tem. This mean sthato nlyt he driver's door and
th ef uel filler flap are unlocke dwhen th evehicl e
is unlocked. This is useful if you frequentl ytravel
alone.
XTo change th esetting: press and hold down
th e% and& buttons simultaneousl y
for approximately six seconds until th ebat-
tery chec klamp (
Ypage 77) flashes twice .
If th esetting of th elocking system is changed
within th esignal range of th evehicle, pressing
th e& or% button:
Rlocks or
Runlocks th evehicl e
The SmartKey no wfunction sasfollows :
XTo unlock: press the% buttononce.
XTo unlock centrally: press the% button
twice .
XTo lock: press the& button.
The KEYLESS-GO function scan be changed as
follows :
XTo unlock th edriver's door :touch th einner
surfac eofthedoor handle on th edriver's
door .
XTo unlock centrally: touch theinner surfac e
of th efront-pa ssenger door handle.
XTo lock centrally: touch theouter sensor
surfac eono neof th edoor handles .
XTo restorethe factory settings: press and
hold th e% and& buttons simultane -
ousl yfor approximately six seconds until th e
bat tery che
c klamp (Ypage 77) flashes
twice .
Mechanical key
Gene raln otes
If th evehicl ecan no longer be locke dor
unlocke dwitht he SmartKey or KEYLESS-GO ,
use th emechanical key.
If you use th emechanical ke ytou nloc kand
open th edriver's door ,the anti-thef talarm sys-
te mw ill be triggered .Switc hoff th ealarm
(
Ypage 73) .
If you unloc kthe vehicl eusingthe mechanical
key, th efuel filler flap will no tbeunlocke dauto -
matically.
XTo unlock th efuelfiller flap: insert the
SmartKey int othe ignition lock.
Removing th emechanicalk ey
XPush release catch :in th edirection of th e
arrow and at th esam etimer emove mechan -
ical ke y; from th eSmartKey.
Further information :
RUnlocking thedriver's door (Ypage 82)
RLocking th evehicl e(Ypage 82 )
Inserting th emechanicalk ey
XPush mechanical ke y; completely int othe
SmartKey until it engage sand release
catch :is bac kinitsbasic position .
76SmartKey
Opening and closing

Unlocking and opening doors from
the inside
You can openadoor from inside the vehicle
even if it has been locked. If the vehicle has been
locked with the SmartKey or with KEYLESS-GO,
openin gadoor from the inside will trigger the
anti-theft alarm system .Switc hoff the alarm
(
Ypage 73).
XPull door handle ;.
If the door is locked, locking knob :pops up.
The door is unlocked and opens.
Centrally locking and unlocking the
vehicle from the inside
You can centrally lock and unlock the vehicle
from the inside. The switches are on the driver’s
door.
XTo unlock: press button :.
XTo lock:press button ;.
When the front-passenge rdoor is closed, the
vehicle is locked.
Meanwhile, the fuel filler flap will not be locked
or unlocked. You cannot unlock the vehicle centrally from the
inside if the vehicle has been locked with the
SmartKey or KEYLESS-GO.
The doors can be opened from the inside.
If the vehicle has been locked with the SmartKey
or with KEYLESS-GO, openin gadoor from the
inside will trigger the anti-theft alarm system.
Switc hoff the alarm (
Ypage 73).
When alocked door is opened from inside the
vehicle, the previous unlocking process will be
acknowledged if the vehicle:
Rhas been locked with the locking button for
the central locking or
Rhas been locked automatically
The vehicle will be fully unlocked if it had previ-
ously been fully unlocked. If only the driver's
door had been previously unlocked, only the
door which has been opened from the inside is
unlocked.
Automatic locking feature
XTo deactivate: press and hold button :for
approximately five seconds until atone
sounds.
XTo activate: press and hold button ;for
approximately five seconds until atone
sounds.
If you press one of the two buttons and do not
hear atone, the relevants etting has already
been selected.
The vehicle is locked automatically when the
ignition is switched on and the wheels are turn-
ing.
You could therefore be locked out if:
Rthe vehicle is being pushed.
Rthe vehicle is being towed.
Rthe vehicle is on aroller dynamometer.
Doors81
Opening and closing
Z

vehicle, even if you only leave it forashort time.
Pay attention to the important safety notes.
XDepress the brake pedala nd keep it
depressed.
XPress the Start/Stop button once
(Ypag e131).
The engine starts.
Starting procedure via smartphone
Observe the important safety notes on starting
the engine (Ypag e133).
You can als ostart you rengine via you rsmart-
phone from outside the vehicle. In this case, the
previousl yselected climate control setting is
activated .Inthis way you can cool or heat the
interior of the vehicl ebefore starting the jour-
ney.
Only start the engine via you rsmartphone if it is
safe to start and run the engine where you rvehi-
cle is parked.
Observe the lega lstipulations in the area where
you rvehicl eisp arked .Engine start via smart-
phone may be limited to certain countries or
regions.
You can execute amaximu moftwo consecutive
starting attempts via you rsmartphone. If you
insert the SmartKey into the ignitio nlock, you
can carry out two more starting attempts.
Once you have started the engine, you can
switch the engine off via you rsmartphone at any
time.
You can only start the engine via you rsmart-
phone if:
Rthe SmartKey is in the ignitio nlock
Rpark position Pis selected
Rthe accelerator pedalisn ot depressed
Rthe anti-theft alarm system is not activated
Rthe panic alarm is not activated
Rthe hazard warning lampsare switched off
Rthe hood is closed.
Rthe doors are closed and locked
Rthe windows and sliding sunroof are closed
Also make sure that:
Rthe fuel tank is sufficiently filled
Rthe starter battery is sufficiently charged
GWARNING
Limbs could be crushed or trappe difthe
engine is started unintentionally during ser-
vice or maintenance work. There is arisk of
injury.
Always secure the engine against uninten-
tional starting before carrying out mainte-
nance or repair work.
Make sure that the engine cannot be started via
you rsmartphone before carrying out mainte-
nance or repairs. You can prevent an engine
start via you rsmartphone, for example, if you:
Rswitch on the hazard warning lamps
Rdo not lock the doors
Ropen the hood
Pulling away
General notes
GWARNING
If the engine speedisa bove the idling speed
and you engage transmission position Dor R,
the vehicl ecould pul lawa ysuddenly.T here is
ar isk of an accident.
When engaging transmission position Dor R,
alway sfirmly depress the brake pedala nd do
not simultaneously accelerate.
Depress the accelerator carefully when pulling
away.
The vehicl elocks centrally once you have pulled
away. The locking knobs in the doors drop down.
You can open the doors from the insid eatany
time.
You can als odeactivate the automatic locking
feature, see the Digital Operator's Manual.
It is only possible to shift the transmission from
position Pto the desired position if you depress
the brake pedal. Only then is the parking lock
released. If you do not depress the brake pedal,
the DIRECT SELECT lever can still be moved but the parking lock remains engaged.
iUpshifts take place at highere ngine speeds
after acold start. This help sthe catalytic con-
verter to reach its operating temperature
more quickly.
Information on the automatic release of the
electric parking brake (
Ypag e154).
134Driving
Driving and parking

Hill start assist
Hill start assist helpsyou when pulling awa yfor-
wards or in reverse on an uphill gradient. It holds
the vehiclef oras hort time after you have
removed you rfoot from the brake pedal. This
gives you enoug htime to move you rfoot from
the brake pedaltot he accelerator pedala nd to
depress it before the vehicleb egins to roll.
GWARNING
After ashort time, hil lstart assist wil lnolon-
ger brake you rvehicl eand it coul droll away.
There is arisk of an accident and injury.
Therefore, quickly move you rfoot from the
brake pedaltot he accelerator pedal. Never
leave the vehiclew hen it is held by hillstart
assist.
Hill start assist is not active if:
Ryou are pulling awa yonalevelroad or on a
downhill gradient.
Rthe transmission is in position N.
Rthe electric parking brake is applied.
RESP®is malfunctioning.
ECOstart/stop function
Introduction
The ECO start/stop function switches the
engine off automatically if the vehicleiss topped
under certain conditions.
The engine starts automatically when the driver
wants to pul lawa ya gain. The ECO start/stop
function thereby help syou to reduce the fuel
consumption and emissions of you rvehicle.
Important safety notes
GWARNING
If the engine is switched off automatically and
you exit the vehicle, the engine is restarted
automatically .The vehiclem ay beginmoving.
There is arisk of accident and injury.
If you wis htoexit the vehicle, alway sturn off
the ignitio nand secure the vehiclea gainst
rolling away.
General notes
:ECO start/stop display
The ECO start/stop function is activated when-
ever you start the engine using the SmartKey or the Start/Stop button.
If the engine has been switched off automati-
call ybyt he ECO start/stop function, the è
ECO symbol is shownint he multifunction dis-
play.
Mercedes-AMG vehicles: the ECO start/stop
function is only available in drive program C.
Automatic engine switch-off
If the vehicleisb raked toastandstil lin D or N,
the ECO start/stop function switches off the
engine automatically.
The ECO start/stop function is operational
when:
Rthe indicator lamp in the ECO button is lit
green.
Rthe outside temperature is withi nthe range
that is suitable for the system.
Rthe engine is at normal operating tempera-
ture.
Rthe set temperature for the vehiclei nterior
has been reached.
Rthe battery is sufficiently charged.
Rthe system detects that the windshiel disnot
fogged up when the air-conditioning system is switched on.
Rthe hood is closed.
Rthe driver's door is closed and the driver's
seat beltisf astened.
All of the vehicle's systems remai nactive when
the engine is stoppeda utomatically.
The HOLD function can als obeactivated if the
engine has been switched off automatically .Itis
then not necessary to continue applying the
brakes during the automatic stop phase. When
you depress the accelerator pedal, the engine
starts automatically and the braking effect of
the HOLD function is deactivated.
Driving135
Driving and parking
Z

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

Drive program S+ (SportPlus)
Drive progra mS+ is characterized by th efol-
lowing:
Rth ev ehicl eexhibits particularl ysport ydrivin g
characteristics .
Rthev ehicl epulls away in first gear .
Rthea utomati ctransmissio nshift supl ater.
The fue lconsum ption possibl ybein gh igher
as aresult of th elater automati ctransmissio n
shift points .
Rthes uspensio nexhibits particularl ystiff
springin gand dampin gsetting s(vehicles wit h
AIRMATIC) .
RtheE CO start/sto pfunction is no tavailable.
Drive program S(Sport)
Drive progra mSis characterized by th efollow-
ing:
Rth ev ehicl eexhibits sport ydrivin gcharacter-
istics .
Rthev ehicl epulls away in first gear .
Rthea utomati ctransmissio nshift supl ater.
The fue lconsu mption possibl ybein gh igher
as aresult of th elater automati ctransmissio n
shift points .
Rthes uspensio nexhibits har dspringin gand
dampin gsetting s(vehicles wit hAIRMATIC) .
Drive program C(Comfort)
Drive progra mCis characterized by th efollow-
ing:
Rth ev ehicl edeliver scomfo rtable, economical
handlin gcharacteristics .
Rthev ehicl epulls away mor egentl yinf orwar d
a
nd revers egears, unless th eaccelerato r
peda lisdepressed fully.
Rthev ehicl ehas improved drivin gstability, fo r
exampl eonslipperyroads urfaces.
Roptimal fue lconsu mption resultin gfromt he
automati ctransmissio nshiftin gups ooner.
The vehicl eisdriven in th elow engin espeed
range and th ewheels are less likely to spin .
Drive programE(Economy)
Drive progra mEis characterized by th efollow-
ing:
Rth ev ehicl eexhibits comfortable, economical
handlin gcharacteristics .
Rthev ehicl epulls away mor egentl yinf orwar d
and revers egears, unless th eaccelerato r
peda lisdepressed fully.
Rthev ehicl ehas improved drivin gstability, fo r
exampl eonslipperyroads urfaces.
Roptimal fue lconsum ption resultin gfromt he
automati ctransmissio nshiftin gups ooner.
The vehicl eisdriven in th elow engin espeed
range and th ewheels are less likely to spin .
Rduring deceleration,the engin eisdisconnec-
te df romt hedrive train .The vehicl euses
kineti cenergya nd consumes less fue l(over-
run mode).
Rth ep erformanc eofair-conditionin gsystem
and heatin gare reduced.
Mercedes-AMG vehicles
Drive program RACE (S‑ MODEL)
TheRACE drive progra mischaracterized by th e
following :
Rthev ehicl eexhibits drivin gcharacteristics
suitable fo rthe racetrack.
Rall vehicl esystems are set fo rmaximum
sportiness .
Rtheg earshift recommendation gives you
information fo rslowly warmin gupthedrive
assemblies and fo radopting afuel-efficien t
drivin gstyle (
Ypage 146). You can follow th e
gearshift recommendation satall times and
shift gear accordingly usin gthe steerin g
whee lpaddl eshifters .Onthebasi soft he
gearshift recommendation ,usin gthe steerin g
whee lpaddl eshifters ,you can optimiz ethe
drive train and engin eoperatin gmodeata ny
time.
Rif you hav eselected agear manually, this will
be maintaine duntil th evehicl espeed increa-
ses or decreases dramatically.
Rth ev ehicl epulls away in first gear .
Rthea utomati ctransmissio nshift supl ater.
The fue lconsum ption possibl ybein gh igher
as aresult of th elater automati ctransmissio n
shift points .
Automatic transmission145
Driving andpark ing
Z