2017 MERCEDES-BENZ C-Class COUPE automatic transmission

ProblemPossible causes/consequences andMSolutions
The engine cannot be
started using the Smart-
Key.The on-board voltage is too low.
XSwitch off non-essential consumers, e.g. seat heating or interior
lighting, and try to start the engine again.
If this does not work:
XCheck the starter battery and charge it if necessary (Ypage 307).
or
XJump-start the vehicle (Ypage 308).
or
XConsult aqualified specialist workshop.
The engine cannot be
started using the Start/
Stop button. The Smart-
Key is in the vehicle.The vehicle is locked.
XUnlock the vehicle and try to start the vehicle again.
The SmartKey battery is discharged or nearly discharged.
XCheck the SmartKey battery (Ypage 77) and replace it if necessary
(Ypage 77).
If this does not work:
XStart your vehicle with the SmartKey in the ignition lock.
There is interference from apowerful source of radio waves.
XStart your vehicle with the SmartKey in the ignition lock.
You have lost aSmart-
Key.XHave the SmartKey deactivated at aqualified specialist workshop.
XReport the loss immediately to the vehicle insurers.
XIf necessary, have the locks changed as well.
You have lost the
mechanical key.XReport the loss immediately to the vehicle insurers.
XIf necessary, have the locks changed as well.
Doors
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.
80Doors
Opening and closing

The rear-view mirror and the exterior mirror on
the driver's side automatically go into anti-glare
mode if the following conditions are met simul-
taneously:
Rthe ignition is switched on
Rincident light from headlamps strikes the sen-
sor in the rear-view mirror
The mirrors do not go into anti-glare mode if
reverse gear is engaged or if the interior lighting
is switched on.
Parking position for the exterior mir-
ror on the front-passenger side
Storing the parking position
You can position the front-passenger side exte-
rior mirror in such away that you can see the
rear wheel on that side as soon as you engage
reverse gear. You can store this position.
Using reverse gear
:Memory button M
;Adjustment button
=Button for the front-passenger side exterior
mirror
?Button for the driver's side exterior mirror
XTurn the SmartKey to position 2in the ignition
lock (Ypage 131).
XPress button =for the exterior mirror on the
front-passenger side.
XEngage reverse gear.
The exterior mirror on the front-passenger
side moves to the preset parking position.
XUse adjustmen tbutton ;to adjust the exte-
rior mirror to aposition that allows you to see
the rear wheel and the curb.
The parking position is stored.
iIf you shift the transmission to another posi-
tion, the exterior mirror on the front-
passenger side return stothe driving position.
Using the memor ybutton
You can store the parking position of the exte-
rior mirror on the front-passenger side using
memory button M:.T he reverse gear must not
be engaged.
XTurn the SmartKey to position 2in the ignition
lock (Ypage 131).
XPress button =for the exterior mirror on the
front-passenger side.
XUse adjustmen tbutton ;to adjust the exte-
rior mirror to aposition that allows you to see
the rear wheel and the curb.
XPress memory button M: and one of the
arrows on adjustmen tbutton ;within three
seconds.
The parking position is stored if the exterior
mirror does not move.
XIf the mirror moves out of position, repeat the
steps.
XAfter successfully storing, reset the driving
position of the exterior mirror.
Calling up astored parking position set-
ting
XTurn the SmartKey to position 2in the ignition
lock (Ypage 131).
XAdjust the exterior mirror on the front-
passenger side using button =.
XEngage reverse gear.
The exterior mirror on the front-passenger
side moves to the stored parking position.
The exterior mirror on the front-passenger side
moves back to its original position:
Ras soon as you exceed aspeed of 9mph
(15 km/h)
Rabout ten seconds after you have disengaged
reverse gear
Rif you press button ?for the exterior mirror
on the driver's side
108Mirrors
Seats, steering wheel and mirrors

GWARNING
If you switch off the ignitio nwhile driving,
safety-relevant functions are only available
with limitations, or not at all .This coul daffect,
for example, the power steering and the brake
boosting effect. You wil lrequire considerably
more effort to steer and brake. There is arisk
of an accident.
Do not switch off the ignitio nwhile driving.
GWARNING
If the parking brake has not been fully
released when driving, the parking brake can:
Roverheat and caus eafire
Rlose its hold function.
There is arisk of fire and an accident. Release
the parking brake full ybefore driving off.
!Do not war mupthe engine with the vehicle
stationary. Drive off immediately. Avoid high
engine speeds and driving at full throttle until
the engine has reache dits operating temper-
ature.
Only shift the automatic transmission to the
desired drive position when the vehicleiss ta-
tionary.
Where possible,a voids pinning the drive
wheels when pulling awa yonslippery roads.
You coul dotherwise damage the drive train.
!Mercedes-AMG vehicles: at low engine oil
temperatures below 68 ‡(+20 †), the max-
imum engine speedisr estricted in order to
protect the engine. To protect the engine and
maintai nsmooth engine operation, avoi ddriv-
ing at full throttle when the engine is cold.
SmartKey positions
SmartKey
gTo remove the SmartKey
1Powe rsupply for some consumers ,such as
the windshiel dwipers
2Ignition (power supply for all consumers)
and drive position
3To start the engine
iThe SmartKey can be turned in the ignition
lock even if it is not the correct SmartKey for
the vehicle. The ignitio nisnot switched on.
The engine cannot be started.
Start/Stop button
General notes
When you insert the Start/Stop button into the
ignitio nlock, the system needs approximately
two seconds recognitio ntime. You can then use
the Start/Stop button.
Pressing the Start/Stop button severalt imes in
succession corresponds to the different key
positions in the ignitio nlock. This is only the
case if you are not depressing the brake pedal.
If you depress the brake pedala nd press the
Start/Stop button, the engine starts immedi-
ately.
Ac heck which periodically establishe saradio
connection between the vehiclea nd the Smart-
Key determines whethe ravalidS martKey is in
the vehicle. This occurs, for example, when
starting the engine.
Driving131
Driving and parking
Z

To start the vehicle without actively using the
SmartKey:
Rthe Start/Stop button must be inserted in the
ignition lock.
Rthe SmartKey must be in the vehicle.
Rthe vehicle must not be locked with the
SmartKey or KEYLESS-GO (Ypage 75).
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.
If you lock the vehicle with the SmartKey's
remote control or with KEYLESS-GO, after a
short time:
Ryou will not be able to switch on the ignition
with the Start/Stop button.
Ryou will not be able to start the engine with the
Start/Stop button until the vehicle is
unlocked again.
If you lock the vehicle centrally using the button
on the front door (
Ypage 81), you can continue
to start the engine with the Start/Stop button.
The engine can be switched off while the vehicle
is in motion by pressing and holding the Start/
Stop button for three seconds. This function
operates independently of the ECO start/stop
automatic engine switch-off function.
Key positions with the Start/Stop button
:Start/Stop button
;Ignition lock
As soon as the ignition is switched on, all the
indicator lamps in the instrument cluster light
up. Further information on situations where an
indicator lamp either fails to go out after starting the engine or lights up while driving
(
Ypage 248).
If Start/Stop button :has not yet been
pressed, this corresponds to the SmartKey
being removed from the ignition.
XTo switch on the power supply: press
Start/Stop button :once.
The power supply is switched on. You can now activate the windshield wipers, for example.
The power supply is switched off again if:
Rthe driver's door is opened and
Ryou press Start/Stop button :twice when in
this position
XTo switch on the ignition: press Start/Stop
button :twice.
The ignition is switched on.
The ignition is switched off again if:
Ryou do not start the engine from this position
within 15 minutes
Ryou press Start/Stop button :twice when in
this position
The power supply is switched off again if:
Rthe driver's door is opened and
Ryou press Start/Stop button :twice when in
this position
Removing the Start/Stop button
You can remove the Start/Stop button from the
ignition lock and start the vehicle as normal
using the SmartKey.
It is only possible to switch between Start/Stop
button mode and SmartKey operation when the
transmission is in position P.
XRemove Start/Stop button :from ignition
lock ;.
You do not have to remove the Start/Stop but-
ton from the ignition lock when you leave the
vehicle. You should, however, alwayst ake the
SmartKey with you when leaving the vehicle. As
long as the SmartKey is in the vehicle:
Rthe vehicle can be started using the Start/
Stop button
Rthe electrically powered equipment can be
operated
132Driving
Driving and parking

Starting the engine
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
Combustion engines emit poisonous exhaust
gases such as carbon monoxide. Inhaling
these exhaust gases leads to poisoning. There
is ar isk of fatal injury. Therefore never leave
the engine running in enclosed spaces with-
out sufficient ventilation.
GWARNING
Flammable materials introduced through
environmental influence or by animals can
ignite if in contact with the exhaust system or
parts of the engine that heat up. There is arisk
of fire.
Carry out regular checkstom ake sure that
there are no flammable foreign materials in
the engine compartmentorint he exhaust
system.
General notes
The catalytic converter is preheated for up to
30 seconds after acold start. The sound of the
engine may change during this time.
Automatic transmission
XShift the transmission to position P
(Ypage 141).
The transmission position display in the mul-
tifunction display shows P(
Ypage 142).
iYou can start the engine in transmission
position Pand N.
Starting procedurew ith the SmartKey
To start the engine using the SmartKey instead
of the Start/Stop button, pull the Start/Stop
button out of the ignition lock.
XTurn the SmartKey to position 3in the ignition
lock and release it as soon as the engine is
running (
Ypage 131).
If the engine will not start:
XRemove the SmartKey from the ignition lock.
XReinsert the SmartKey into the ignition lock
after ashort waiting period.
XTurn the SmartKey to position 2in the ignition
lock (Ypage 131).
The indicator lamps in the instrumentc luster
light up (
Ypage 246).
XTurn the SmartKey to position 3in the ignition
lock (Ypage 131) and release it as soon as the
engine is running.
Starting procedurew ith the Start/Stop
button
The Start/Stop button is only available on vehi-
cles with KEYLESS-GO or the KEYLESS-GO start
function.
The Start/Stop button can be used to start the
vehicle manually without insertingt he SmartKey
into the ignition lock. The Start/Stop button
must be inserted in the ignition lock and the
SmartKey must be in the vehicle. This mode for
startin gthe engine operates independently of
the ECO start/stop automatic engine start func-
tion.
You can start the engine if avalid SmartKey is in
the vehicle. Switch off the engine and always
take the SmartKey with you when leaving the
Driving133
Driving and parking
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

All vehicles (exceptMercedes-AMGvehi-
cles): automat icengines witch-off can take
plac eam aximum of four times inar ow (initial
stop, then three subsequents tops).
Mercedes-AM Gvehicles: then umber of con-
secutiv eautomat icengines witch-off sisunlimi-
te d.
Automatic engine start
The engines tartsa utomaticall yif:
Ryou switch off th eECO start /stopf unction by
pressingt heECO button
Ryou switch to driveprogram S+(all veh icles
excep tMercedes-AM Gvehicle s)
Ryou switch to driveprogram RACE
(S ‑MODEL), S+orS(Mercedes-AM Gvehicle s)
Ryou permanently activatem anual gearshifting
(Ypage 146) (Mercedes-AM Gvehicle s)
Rintransmission position Dor Ntheb rake
pedal isreleased and th eHOLDfunction isnot
active
Ryou depr ess th eaccelerato rpedal
Ryou engage revers egear R
Ryou mov ethe transmission out of position P
Ryou unfasten your seatbeltor open th edriv-
er' sd oor
Rthev ehicle start stor oll
Rtheb rak esystem requires th is
Rthet em peratur eintheveh icle interio rdevi-
ate sfromt heset range
Rthes ystem detect smoistur eont hewind -
shield when th eair-conditionin gsystem is
swit ched on
Rtheb attery's conditio nofcharge istool ow
Sh ifting th etransmission to position Pdoes not
start th eengine.
Deactivatin goractivatin gthe ECO
start/stop function
All vehicles (exceptM ercedes-AMGvehi-
cles)
XTo deactivate: press ECO button :.
In dicato rlamp ;goes out.
XTo activate: press ECO button :.
In dicato rlamp ;lightsu p.
If indicator lamp ;is off ,the ECO start/stop
function has been deactivate dmanually or as
th er esult of amalfunction. The enginew ill then
no tbes witched off automaticall ywhen th evehi-
cle stops.
Selecting driv eprogram S+deactivate sthe ECO
start /stopf unction.Ify ou press ECO button :,
th eE CO start/sto pfunction isactivated.
Mercedes-AM Gvehicles
XTo deactivate: press ECO button :.
In dicato rlamp ;goes out.
XTo activate: press ECO button :.
In dicato rlamp ;lightsu p.
If indicator lamp ;is off ,the ECO start/stop
function has been deactivate dmanually or as
th er esult of amalfunction. The enginew ill then
136Driving
Driving and parking