2015 MERCEDES-BENZ C-CLASS COUPE Owners Manual

environmentally responsible
recyclin gsystem. Dispose of batteries in an
environmentally responsible
manner. Take discharged
batteries to
aqualified spe-
cialist workshop or to acol-
lection point for used batter-
ies.
Replacing the battery AC
R2450 lithium batter yisrequired when
replacing the battery.
X Press apointed objec tinto recess :.
X Slide batter ycover ;backwards in the direc-
tion of the arrow.
X Inser tnew battery =with the lettering facing
upwards.
X Slide batter ycover ;in the opposite direc-
tion to the arrow on the remot econtrol until it
engages. 142
Operating thec
limatecontrol systemClimatecontrol

Problems with the auxiliary heating/ventilation
Problem
Possible causes/consequences and
M
MSolutions FAIL¨ The signal transmission between the transmitter and the vehicle is
faulty.
X
Change your position in relation to the vehicle, moving closer if
necessary. FAIL The auxiliary heating/ventilation cannot be switched on or has
switched itself off.
The starter battery is not sufficiently charged.
X Charge the starter battery. The fuel tank content is below the reserve fuel level.
X Refuel at the nearest filling station. FAIL
¯ The auxiliary heating/ventilation is malfunctioning.
X Have the auxiliary heating/ventilation checked at aqualified spe-
cialist workshop. Air vents
Important safety notes
G
WARNING
Very hot or very cold air can flow from the air vents. This could result in burns or frostbit ein
the immediate vicinity of the air vents. There
is ar isk of injury.
Make sure that all vehicle occupants always
maintain asufficient distance to the air out-
lets. If necessary, redirect the airflow to
another area of the vehicle interior.
In order to ensure the direct flow of fresh air
through the air ventsi nto the vehicle interior,
please observe the following notes:
R keep the air inlet between the windscreen and
the bonnet free of blockages, such as ice,
snow or leaves
R never cover the ventsorv entilation grilles in
the vehicle interior Adjusting the air vents
Example
:
Side window demister vent
; Side air vent,l eft
= Control for left side air vent
X To open or close: turn thumbwheel=to the
left or right as far as it will go.
X To adjust the air direction: hold side air
vent ;by thumbwheel =and move it up or
down or to the left or right. Air vents
143Climatecontrol Z

Running-i
nnotes Important safety notes
In certain driving and driving safety systems ,the
sensors adjust automaticall ywhile acertain dis-
tance is being driven afte rthe vehicl ehasbeen
delivered or afte rrepairs. Ful lsystem effective-
ness is not reached unti lthe end of this teach-in
process.
Brake pads/linings and discs that are either new or have bee nreplaced only achieve optimum
braking effect afte rsevera lhun dre dkilometres
of driving .Com pensate for the reduce dbraking
effect by applying greate rforce to the brake
pedal. The firs
t1,50 0km
If yo utrea tthe engine with sufficient care from
the very start, yo uwillber ewarded with excel-
lent performance for the remainder of the
engine's life.
R Drive at varying roa dspeeds and engine
speeds for the firs t1,500 km.
R Avoi doverstraining the vehicl eduring this
period, e.g. driving at ful lthrottle.
R Whe nchanging gears manually ,change up in
goo dtime ,before the rev counter needle rea-
ches Ôof the wa ytothe red are aofthe rev
counter.
R Do not shift dow nagearm anually in order to
brake.
R Vehicles with automatic transmission: try to
avoid depressing the accelerato rpedal
beyond the point of resistance (kickdown).
Additiona lnotes on running in Mercedes-AMG
vehicles:
R For the firs t1,500 km do not drive at speeds
above 140 km/h.
R Only allo wthe engine to reach amaximum
engine speed of 4,500 rpm briefly.
R Drive the vehicl emainly in drive program Cfor
the firs t1,500 km.
After 1,500 km ,you may gradually accelerate
the vehicl etofullr oa da nd engine speeds.
Yo us houl dalsoo bserve thes enotes on running-
in if the engine or parts of the drive trai nonyour
vehicl ehaveb eenr eplaced.
Alway sobserve the maximum permissible
speed. Self-lockin
grear axl edifferential
(Mercedes-AM Gvehicles)
Your vehicl eisequipped with aself-locking dif-
ferentia lonthe rea raxle.
Chang ethe oi ltoimprove protectio nofthe rear
axl ed ifferential:
R afte rar unning-in perio dof3,000 km
R every 50,00 0kmo r3y ears
These oi lchanges prolong the service life of the
differential. Have the oi lchange carrie doutat a
qualified specialist workshop. Driving
Important safety notes
G
WARNING
Objects in the driver' sfootwell may restrict
the clearance around the pedal sorblock a
depressed pedal .Thisj eopardise sthe oper-
ating and roa dsafety of the vehicle. There is a
ris kofana ccident.
Stow al lobjects securel yinthe vehicl esothat
they do not get into the driver' sfootwell.
Alway sfit the floormats securel yand as pre-
scribed in order to ensure that there is always sufficient roo mfor the pedals. Do not use
loose floormats and do not place severa lfloor-
mats on top of one another. G
WARNING
Unsuitabl efootwear can hinder correct usage
of the pedals, e.g.:
R shoes with thick soles
R shoes with hig hheels
R slippers
There is ariskofana ccident.
Wea rsuitabl efootwear to ensure correct
usag eoft he pedals. G
WARNING
If yo uswitch off the ignition whil edriving,
safety-relevant functions are only available
with limitations ,ornot at all. Thi scould affect,
for example, the power steering and the brake 144
DrivingDriving and parking

boostin
geffect. You will require considerably
more effor ttosteer and brake. There is arisk
of an accident.
Do not switch off the ignition while driving. G
WARNING
If the parkin gbrake has not been fully
released when driving ,the parkin gbrake can:
R overheat and cause afire
R lose its hold function.
There is arisk of fire and an accident. Release
the parkin gbrake fully before driving off.
! Do not warm up the engin
ewhen the vehicle
is stationary. Driv eoff immediately. Avoid
high engin espeeds and driving at full throttle
until the engin ehas reached its operating
temperature.
Only shift the automatic transmission to the
desired drive position when the vehicle is sta-
tionary.
Where possible, avoid spinning the drive
wheels when pulling away on slippery roads.
You could otherwise damage the drive train.
! Mercedes-AMG vehicles:
at low engineoil
temperatures (below +20 †), the maximum
engin espeed is restricted in order to protect
the engine. To protect the engin eand main-
tain smoot hengin eoperation ,avoid driving at
full throttle when the engin eiscold. Key positions
Key g
To remov ethe key
1 Power supply for some consumers, such as
the windscreen wipers
2 Ignition (power supply for all consumers)
and drive position
3 To start the vehicle
i If the key does not belong to the vehicle, it
can still be turned in the ignition lock .How-
ever, the ignition will not be switched on. The
engin ecannot be started.
Start/Stop button General notes
When you insert the Start/Stop butto nintot he
ignition lock ,the system needs approximately
two seconds recognition time. You can then use
the Start/Stop button.
Pressin gthe Start/Stop butto nseveral times in
succession corresponds to the differen tkey
position sinthe ignition lock .This is only the
case if you are not depressin gthe brake pedal.
If you depress the brake pedal and press the
Start/Stop button, the engin estart simmedi-
ately.
Ac hec kwhich periodically establishes aradio
connection between the vehicle and the key
determines whether avalid key is in the vehicle.
This occurs, for example, when starting the
engine. Driving
145Driving and parking Z

To start the vehicle without actively using the
key:
R the Start/Stop button must be inserted in the
ignition lock
R the key must be in the vehicle
R the vehicle must not be locked with the key or
KEYLESS-GO (Y page 81)
Do not keep the key:
R with electronic devices, e.g. amobile phone
or another key
R with metallic objects, e.g. coins or metal film
R inside metallic objects, e.g. ametal case
This can affect the key's functionality.
If you lock the vehicle with the key's remote
control or with KEYLESS-GO, after ashort time:
R you will not be able to switch on the ignition
with the Start/Stop button
R you 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 (Y page 87), 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
When you switch on the ignition, all of the indi-
cator lamps in the instrument cluster light up.
Further information on situations where an indi-
cator lamp either fails to go out after starting the engine or lights up while driving (Y page 286).If Start/Stop button
:has not yet been
pressed, this corresponds to the key being
removed from the ignition.
X To switch on the power supply: press
Start/Stop button :once.
The power supply is switched on. You can now activate the windscreen wipers, for example.
The power supply is switched off again if:
R the driver's door is opened and
R you press Start/Stop button :twice when in
this position
X To switch on the ignition: press Start/Stop
button :twice.
The ignition is switched on.
The ignition is switched off again if:
R you do not start the engine from this position
within 15 minutes
R you press Start/Stop button :twice when in
this position
The power supply is switched off again if:
R the driver's door is opened and
R you 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 key.
It is only possible to switch between Start/Stop
button mode and key operation when the trans-
mission is in position P.
X Remove 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, alway stake the
key with you when leaving the vehicle. As long as
the key is in the vehicle:
R the vehicle can be started using the Start/
Stop button
R the electrically powered equipment can be
operated 146
DrivingDriving and parking

Starting the vehicle
Important safety notes G
WARNING
If children are left unsupervised in the vehicle, they could:
R open doors, thereby endangering other per-
sons or road users
R get out and be struck by oncomingt raffic
R operate vehicle equipment and become
trapped, for example
In addition, the children could also set the
vehicle in motion, for example, if they:
R release the parking brake
R shift the automatic transmission out of park
position Porshift manual transmission into
neutral
R start the engine
There is arisk of an accident and injury.
When leaving the vehicle, always take the key with you and lock the vehicle. Never leave
children and animals unattended in the vehi-
cle. Keep the keys out of the reach of children. G
WARNING
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. G
WARNING
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 compartmen torinthe exhaust
system. General notes Vehicles with
apetrol engine: the catalytic
converter is preheated for up to 30 seconds
after acold start. The sound of the engine may
change during this time.
Manual transmission X
Depress the brake pedal and keep it
depressed.
X Fully depress the clutch pedal.
X Shift to neutral N.
Automatic transmission X
Shift the transmission to position P
(Y page 158).
The transmission position indicator in the
multifunction display shows P(Y page 159).
i You can start the engine in transmission
position Pand N.
Starting procedurew ith the key To start the engine using the key instead of the
Start/Stop button, pull the Start/Stop button
out of the ignition lock.
X To startad iesel engine:t urn the key to
position 2in the ignition lock (Y page 145).
The % preglow indicator lamp in the instru-
ment cluster lights up.
X Turn the key to position 3in the ignition lock
and release it as soon as the engine is running
(Y page 145).
i Vehicles with
adiesel engine: you can
start the engine without preglow if the engine
is warm.
If the engine will not start:
X Remove the key from the ignition lock.
X Reinsert the key into the ignition lock after
waiting for ashort period.
X Turn the key to position 2in the ignition lock
(Y page 145).
The indicator lamps in the instrumen tcluster
light up (Y page 285).
X Turn the key to position 3(Y page 145) in the
ignition lock and release it as soon as the
engine is running. Driving
147Driving and parking Z

Starting procedureu
sing 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 insertin gthe key into
the ignition lock. The key must be in the vehicle and the Start/Stop button must be inserted in
the ignition lock. This mode for startingt he
engine operates independently of the ECO
start/stop automatic engine start function.
You can start the engine if avalid key is in the
vehicle. Switch off the engine and always take
the key with you when leaving the vehicle, even
if you only leave it for ashort time. Pay attention
to the important safety notes.
X Depress the brake pedal and keep it
depressed.
X Press the Start/Stop button once
(Y page 145).
Vehicles with apetrol engine: the engine
starts.
Vehicles with adiesel engine: preglow is
activated and the engine starts. Pulling away
General notes G
WARNING
Vehicles with automatic transmission:
If the engine speed is above the engine idling speed and you then engage transmission
position Dor R,t he vehicle may accelerate
suddenly. There is arisk of an accident.
When engaging transmission position Dor R,
always keep the brake pedal firmly depressed
and do not depress the accelerator pedal at
the same time.
! Vehicles with manualt
ransmission:
change gear in good time and avoid spinning
the wheels. You could otherwise damage the
vehicle.
Depress the accelerator carefully when pulling
away.
The vehicle locks centrally once you have pulled
away.T he locking knobs in the doors drop down. You can open the doors from the inside at any
time.
You can also deactivate the automatic locking
feature; see the Digital Owner's Manual.
Vehicles with automatic transmission: it is
only possible to shift the transmission from posi- tion Pto the desired position if you depress the
brake pedal. If you do not depress the brake
pedal, the DIRECT SELECT lever can still be
moved but the parking lock remains engaged.
i Vehicles with automatic transmission:
upshifts take place at higher engine speeds
after acold start. This helps the catalytic con-
verter to reach its operating temperature
more quickly.
Information on automatically releasing the elec- trical parking brake (Y page 175).
Pulling away with atrailer To ensure that you do not roll backwards when
pulling away on an uphill slope, apply the electric
parking brake.
X Press and hold handle :.
The electric parking brake continues to brake
and prevent the vehicle from rolling back-
wards.
The red !indicator lamp in the instrument
cluster remains lit.
X Depress the accelerator pedal.
X As soon as the vehicle/trailer combination is
held by the driving force of the engine, release lever :.
The electric parking brake is released.
The red !indicator lamp in the instrument
cluster goes out.
For further information on the electric parking
brake, see (Y page 174).148
DrivingDriving and parking

Hill start assist
Hill start assist help
syou when pulling awa yfor-
wards or in reverse on an uphill gradient. It holds
the vehicl efor as hort time after you have
removed you rfoot from the brake pedal. This
gives you enoug htime to move yourf oot from
the brake peda ltothe accelerator peda land
depress it before the vehicl ebegins to roll. G
WARNING
After awhile, hills tart assist no longer holds
the vehicl eand it may roll away. There is arisk
of an accident and injury.
Therefore, quickly move yourf oot from the
brake peda ltothe accelerator pedal. Never
leave the vehicl ewhen it is held by hills tart
assist.
Hill start assist is not active if:
R you are pulling awayonal evelroad or a
downhill gradient
R on vehicles with automatic transmission, the
transmission is in position N
R the electric parking brake is applied
R ESP ®
is malfunctioning ECOs
tart/stop function
Introduction The ECO start/stop function switches the
engine off automatically if the vehicl eisstopped
under certain conditions.
When pulling awa yagain, the engine starts auto-
matically .The ECO start/stop function thereby
help syou to reduce the fuel consumption and
emissions of you rvehicle.
Important safety notes G
WARNING
If the engine is switched off automatically and you exit the vehicle, the engine is restarted
automatically.T he vehiclemay begi nmoving.
There is arisk of accident and injury.
If you wis htoexit the vehicle, alwayst urn off
the ignitio nand secure the vehicl eagainst
rolling away. General notes
:
ECO start/stop display
All vehicle s(except Mercedes-AMG vehi-
cles): the ECO start/stop function is activated
whenever you switch on the engine using the
key or the Start/Stop button.
If the è ECO symbol is show ningreen in the
multifunction display ,the ECO start/stop func-
tion switches the engine off automatically once the vehicl estops moving.
If the ECO start/stop function has been man-
ually deactivated (Y page151) or amalfunction
has caused the system to be deactivated, the
è ECO symbol is not displayed.
Mercedes-AMG vehicles: the ECO start/stop
function is only available in drive program C.
Mercedes-AMG vehicles: the ECO start/stop
function is activated whenever you switch on
the engine using the key or the Start/Stop but- ton. This is the case if:
R the ignitio nwas switched off for more than
four hour sor
R the ECO start/stop function had been activa-
ted before the engine was switched off
Automatic engine switch-off General notes
The ECO start/stop function is operational and
the è ECO symbol is displayed in green in the
multifunction display ,if:
R the indicator lamp in the ECO button is lit
green
R the outside temperature is withi nthe range
that is suitable for the system
R the engine is at normal operating temperature
R the set temperature for the vehicl einterior
has been reached
R the battery is sufficiently charged
R the system detects that the windscreen is not
misted up when the air-conditioning system isswitched on Driving
149Driving and parking Z