2018 MERCEDES-BENZ C-CLASS CABRIOLET gas

Flat tireChanging a wheel/mounting the
spare wheel .................................. .331
MOExtended tires .......................... 297
Preparing the vehicle ..................... 296
TIREFIT kit ...................................... 298
Floormats ...........................................2 80
Folding wind screen
Cleaning ......................................... 290
Installing .......................................... 92
Removing ......................................... 92
Frequencies
Mobile phone ................................. 338
Two-way radio ................................ 338
Front-passenger seat
see Seat
Fuel
Additives ........................................ 342
Consumption statistics .................. 197
Displaying the current consump-
tion ................................................ 197
Displaying the range ......................1 97
Driving tips ....................................1 47
Fuel gauge ....................................... 36
Grade (gasoline) ............................ 341
Important safety notes .................. 341
Problem (malfunction) ................... 143
Refueling ........................................ 141
Tank content/reserve fuel ............. 341
Fuel filler flap
Closing ...........................................1 43
Fuel level
Calling up the range (on-board
computer) ...................................... 197
Fuel tank
Capacity ........................................ 341
Problem (malfunction) ................... 143
Fuses
Allocation chart .............................3 11
Before changing .............................3 09
Dashboard fuse box ....................... 310
Fuse box in the engine compart-
ment .............................................. 310
Fuse box in the front-passenger
footwell .......................................... 310
Fuse box in the trunk ..................... 311
Important safety notes .................. 309G
G-Meter (on-board computer,
Mercedes-AMG vehicles) .................. 208
Garage door opener
Clearing the memory ..................... 280
General notes ................................ 277
Important safety notes .................. 278
Opening/closing the garage door .. 280
Problems when programming ........2 79
Programming (button in the rear-
view mirror) ................................... 278
Synchronizing the rolling code ....... 279
Gear indicator (on-board com-
puter, Mercedes-AMG vehicles) ....... 208
Genuine parts ...................................... 27
Glove box ...........................................2 64
Google™ Local Search
see also Digital Operator's Man-
ual ..................................................2 53
H
Handbrake
see Parking brake
Handling control system
see ESP
®(Electronic Stability Program)
Handwriting recognition
Switching text reader function
on/off ............................................ 256
Touchpad ....................................... 255
Hazard warning lamps ......................109
Head bags
Display message ............................ 221
Operation ......................................... 51
Head level heating (AIRSCARF) ........100
Head restraints
Adjusting (electrically) ..................... 97
Adjusting the fore-and-aft posi-
tion manually ................................... 96
General notes .................................. 96
Important safety notes .................... 96
Installing/removing (rear) ................ 97
Head-up display
Adjusting the brightness ................ 206
Displays and operating .................. 195
Function/notes .............................1 95
Important safety notes .................. 195
12Index

www.dtsc.ca.gov/HazardousWaste/
Perchlorate/index.cfm.
Methodofoperation
During th efirst stage of acollision ,th erestrain t
system control uni tevaluate simportant physi-
cal dat arelating to vehicl edeceleration or accel-
eration ,suc has:
Rduration
Rdirection
Rintensit y
Based on th eevaluation of this data, th e
restrain tsystem control uni ttriggers th eEmer-
gency Tensioning Devices during afrontal or
rear collision .
An Emergency Tensioning Devic ecan only be
triggered ,if:
Rth eignition is switched on
Rth ecomponent sof th erestrain tsystem are
operational. You can fin dfurther information
under "Restrain tsystem warning lamp "
(
Ypage 44 )
Rtheseat belt buckl etongue has engage din
th ebelt buckl eof th erespective fron tseat
The Emergency Tensioning Devices in th erear
compartmen tare triggered independentl yof th e
loc kstatus of th eseat belts.
If th erestrain tsystem control uni tdetects a
mor esevere accident, further component sof
th erestrain tsystem are activated independ-
entl yof eac hother in certain frontal collision
situations:
RFron tair bags as well as driver's and front-
passenger knee bags
RHea dbag, if th esystem determine sthat
deployment can offer additional protection to
tha
t provided by th eseat belt
The front-passenger fron tair bag is activated or
deactivated depending on th eperson on th e
front-passenger seat .The front-passenger fron t
air bag can only deploy in an acciden tif th e
PASSENGER AI RBA GOF Findicator lamp is off .
Observ eth einformation on th ePASSENGER AI R
BA Gindicator lamp s (
Ypage 44).
Your vehicl ehas two-stag efron tair bags .In th e
first deployment stage, th efron tair bag is filled
wit hpropellan tgas. The fron tair bag is fully
deployed wit hth emaximum amount of propel-
lan tgas if asecon ddeployment threshold is
reached within afew milliseconds. The activation threshold of th
eEmergency Ten -
sioning Devices and th eair bags is determine d
by evaluating th erat eof vehicl edeceleration or
acceleration whic hoccur sat various points in
th evehicle. This process is pre-emptive in
nature. Deploymen tshould tak eplac ein goo d
time at th estart of th ecollision .
The rat eof vehicl edeceleration or acceleration
and th edirection of th eforce are essentially
determine dby:
Rth edistribution of force sduring th ecollision
Rth ecollision angle
Rth edeformation characteristics of th evehicl e
Rthecharacteristics of th eobjec twit hwhic h
th evehicl ehas collide d
Factors whic hcan only be see nand measured
after acollision has occurred do no tplay adeci-
siv erol ein th edeployment of an air bag. Nor do
they provid ean indication of air bag deploy-
ment.
The vehicl ecan be deformed considerably, with-
out an air bag bein gdeployed. This is th ecas eif
only part swhic hare relativel yeasil ydeformed
are affecte dand th erat eof deceleration is no t
high .Conversely, air bags may be deployed eve n
though th evehicl esuffer sonly minor deforma-
tion .This is th ecas eif, for example, ver yrigid
vehicl epart ssuc has longitudinal body mem -
ber sare hit ,and sufficien tdeceleration occur s
as aresult .
If th erestrain tsystem control uni tdetects aside
impact or if th evehicl erolls over, th eapplicable
component sof th erestrain tsystem are activa-
te dindependentl yof eac hother depending on
th eapparen ttyp eof accident.
RSid eimpact air bags on th eside of impact ,
independentl yof th eEmergency Tensioning
Devic eand th euse of th eseat belt on th e
driver's seat and in th erear compartmen t
seat s
The side impact air bag on th efront-
passenger side deploys und er th
efo
llowin g
conditions:
-th eOCS system detects that th efront-
passenger seat is occupied or
-th eseat belt buckl etongue is engage din
th ebelt buckl eof th efront-passenger seat
RHea dbag on th eside of impact ,independ-
entl yof th euse of th eseat belt and inde-
pendentl yof whether th efront-passenger
seat is occupied
Occupant safety57
Safety
Z

Locking/unlocking the driver's door
with the mechanical key
i
If you want to centrally lock the vehicle using
the mechanical key, begin by pressing the
locking button for the interior locking mech-
anism while the driver's door is open. Then
lock the driver's door using the mechanical
key.
XInsert the mechanical key into opening :in
the protective cap.
XPull and hold the door handle.
XPull the protective cap on the mechanical key
as straight as possible away from the vehicle
until it releases.
XRelease the door handle.
XTo lock: turn the mechanical key clockwise as
far as it will go to position 1.
XTo unlock:turn the mechanical key counter-
clockwise as far as it will go to position 1.
If you use the mechanical key to unlock and
open the driver's door, the anti-theft alarm sys-
tem will be triggered. Switch off the alarm
(
Ypage 74).
Trunk
Important safety notes
GWARNING
Combustion engines emit poisonous exhaust
gases such as carbon monoxide. Exhaust
gases can enter the vehicle interior if the
trunk lid is open when the engine is running,
especially if the vehicle is in motion. There is a
risk of poisoning.
Always switch off the engine before opening
the trunk lid. Never drive with the trunk lid
open.
GWARNING
If objects, luggage or loads are not secured or
not secured sufficiently, they could slip, tip
over or be flung around and thereby hit vehicle
occupants. There is a risk of injury, particu-
larly in the event of sudden braking or a sud-
den change in direction.
Always store objects so that they cannot be
flung around. Secure objects, luggage or
loads against slipping or tipping before the
journey.
!The trunk lid swings upwards when opened.
Therefore, make sure that there is sufficient
clearance above the trunk lid.
The opening dimensions of the trunk lid can be
found in the "Vehicle data" section
(
Ypage 345).
Do not leave the SmartKey in the trunk. You
could otherwise lock yourself out.
You should preferably place luggage or loads in
the trunk. Observe the loading guidelines
(
Ypage 263).
Opening and closing manually
Opening
XPress the Fbutton on the SmartKey.
The trunk lid opens.
Trunk83
Opening and closing
Z

Closing
XPull the trunk lid down using recess:and
push it closed.
XLock the vehicle if necessary with the &
button on the SmartKey or with KEYLESS-GO
(
Ypage 77).
Opening automatically from outside
Important safety notes
GWARNING
Combustion engines emit poisonous exhaust
gases such as carbon monoxide. Exhaust
gases can enter the vehicle interior if the
trunk lid is open when the engine is running,
especially if the vehicle is in motion. There is a
risk of poisoning.
Always switch off the engine before opening
the trunk lid. Never drive with the trunk lid
open.
The opening dimensions of the trunk lid can be
found in the "Vehicle data" section
(
Ypage 345).
Opening automatically
You can open the trunk lid automatically using
the SmartKey.
XPress and hold the Fbutton on the Smart-
Key until the trunk lid opens.
Opening automatically from inside
Important safety notes
GWARNING
Combustion engines emit poisonous exhaust
gases such as carbon monoxide. Exhaust
gases can enter the vehicle interior if the
trunk lid is open when the engine is running,
especially if the vehicle is in motion. There is a
risk of poisoning.
Always switch off the engine before opening
the trunk lid. Never drive with the trunk lid
open.
!The trunk lid swings upwards when opened.
Therefore, make sure that there is sufficient
clearance above the trunk lid.
The opening dimensions of the trunk lid can be
found in the "Vehicle data" section
(
Ypage 345).
Opening
You can open the trunk lid from the driver's seat
when the vehicle is stationary and unlocked.
XPull remote operating switch :for the trunk
lid until the trunk lid opens.
Locking the trunk separately
You can lock the trunk separately. If you then
unlock the vehicle centrally, the trunk remains
locked and cannot be opened.
84Trunk
Opening and closing

Overview of climate control systems
General notes
Observe the settings recommended on the fol-
lowing pages. The windows could otherwise fog
up.
To prevent the windows from fogging up:
Rswitch off climate control only briefly
Rswitch on air-recirculation mode only briefly
Rswitch on the cooling with air dehumidifica-
tion function
Ractivate the "Windshield defrosting" function
briefly, if required
Climate control regulates the temperature and
air humidity in the vehicle interior. The interior
filter cleans the air, thus improving the interior
climate.
The "Cooling with air dehumidification" function
is only available when the engine is running.
Optimum climate control is only achieved with
the side windows and roof closed.
If you start the engine using your smartphone,
the last selected climate control setting is reac-
tivated (
Ypage 126). The integrated filter filters out most particles of
dust and soot and completely filters out pollen.
It also reduces gaseous pollutants and odors. A
clogged filter reduces the amount of air suppliedto the vehicle interior. For this reason, you
should always observe the interval for replacing
the filter, which is specified in the Maintenance
Booklet. As it depends on environmental condi-
tions, e.g. heavy air pollution, the interval may
be shorter than stated in the Maintenance Book-
let.
iVentilate the vehicle for a brief period during
warm weather, e.g. using the convenience
opening feature (
Ypage 90). This will speed
up the cooling process and the desired inte-
rior temperature will be reached more
quickly.
iIt is possible that the blower may be activa-
ted automatically 60 minutes after the Smart-
Key has been removed depending on various
factors, e.g. the outside temperature. The
vehicle is then ventilated for 30 minutes to dry
the automatic climate control.
Control panel for dual-zone automatic climate control
Example: control panel for dual-zone automatic climate control
:
Sets the temperature, left (Ypage 118)
;Sets the air distribution (Ypage 118)
=Sets the airflow (Ypage 118)
Switches off climate control (
Ypage 116)
Overview of climate control systems115
Climate control

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 a risk 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 a risk 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 a risk
of fire.
Carry out regular checks to make sure that
there are no flammable foreign materials in
the engine compartment or in the exhaust
system.
General notes
The catalytic converter is preheated for up to
30 seconds after a cold start. The sound of the
engine may change during this time.
Automatic transmission
XShift the transmission to position j
(Ypage 133).
The transmission position indicator on the
multifunction display shows j
(
Ypage 134).
iYou can start the engine in transmission
position jand i.
Starting procedure with 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 igni-
tion lock and release it as soon as the engine
is running.
If the engine will not start:
XRemove the SmartKey from the ignition lock.
XReinsert the SmartKey into the ignition lock
after a short waiting period.
XTurn the SmartKey to position 2in the igni-
tion lock (Ypage 123).
The indicator lamps in the instrument cluster
light up (
Ypage 241).
XTurn the SmartKey to position 3
(Ypage 123) in the ignition lock and release it
as soon as the engine is running.
Starting procedure with 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 inserting the 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
starting the engine operates independently of
the ECO start/stop automatic engine start func- tion.
You can start the engine if a valid SmartKey is in
the vehicle. Switch off the engine and always
Driving125
Driving and parking
Z

GWARNING
Fuel is poisonous and hazardous to health.
There is a risk of injury.
You must make sure that fuel does not come into contact with your skin, eyes or clothing
and that it is not swallowed. Do not inhale fuel
vapors. Keep fuel away from children.
If you or others come into contact with fuel,
observe the following:
RWash away fuel from skin immediately
using soap and water.
RIf fuel comes into contact with your eyes,
immediately rinse them thoroughly with
clean water. Seek medical assistance with-
out delay.
RIf fuel is swallowed, seek medical assis-
tance without delay. Do not induce vomit-
ing.
RImmediately change out of clothing which
has come into contact with fuel.
GWARNING
Electrostatic buildup can create sparks and
ignite fuel vapors. There is a risk of fire and
explosion.
Always touch the vehicle body before opening
the fuel filler flap or touching the fuel pump
nozzle. Any existing electrostatic buildup is
thereby discharged.
Do not get into the vehicle again during the refu-
eling process. otherwise electrostatic charge
could build up again.
!Do not use diesel to refuel vehicles with a
gasoline engine. Do not switch on the ignition
if you accidentally refuel with the wrong fuel.
Otherwise, the fuel will enter the fuel system. Even small amounts of the wrong fuel could
result in damage to the fuel system and the
engine. Notify a qualified specialist workshop
and have the fuel tank and fuel lines drained
completely.
!Overfilling the fuel tank could damage the
fuel system.
!Take care not to spill any fuel on painted
surfaces. You could otherwise damage the
paintwork.
!Use a filter when adding fuel from a fuel can.
The fuel lines and/or the fuel injection system
could otherwise be blocked by particles from
the fuel can.
If you overfill the fuel tank, fuel could spray out
when the fuel pump nozzle is removed.
For further information on fuel and fuel quality
(
Ypage 340).
Refueling
General information
Pay attention to the important safety notes
(Ypage 141).
If you unlock/lock the vehicle from the outside,
the fuel filler flap also unlocks/locks.
The position of the 8fuel filler cap is dis-
played on the instrument cluster. The arrow next
to the filling pump indicates the side of the vehi-
cle.
Opening the fuel filler flap
:To open the fuel filler flap
;To insert the fuel filler cap
=Tire pressure table
?Instruction label for fuel type to be refueled
XSwitch off the engine.
XRemove the SmartKey from the ignition lock.
or, in vehicles with KEYLESS-GO start-function
or KEYLESS ‑GO
XOpen the driver's door.
The vehicle electronics are now in setting u.
This is the same as "SmartKey removed".
XPress the fuel filler flap in the direction of
arrow :.
The fuel filler flap swings up.
142Refueling
Driving and parking

XTurn the fuel filler cap counterclockwise and
remove it.
XInsert the fuel filler cap into the holder on theinside of fuel filler flap ;.
XCompletely insert the filler neck of the fuel
pump nozzle into the tank, hook in place and
refuel.
XOnly fill the tank until the pump nozzle
switches off.
Do not add any more fuel after the pump stops
filling for the first time. Otherwise, fuel may leak
out.
Closing the fuel filler flap
XReplace the cap on the filler neck and turn
clockwise until it engages audibly.
XClose the fuel filler flap.
Close the fuel filler flap before locking the vehi-
cle.
If you are driving with the fuel filler cap open, the
8 reserve fuel warning lamp flashes. A mes-
sage appears in the multifunction display
(
Ypage 227).
Problems with fuel and the fuel tank
ProblemPossible causes/consequences and MSolutions
Fuel is leaking from the
vehicle.GWARNING
The fuel line or the fuel tank is faulty.
Risk of explosion or fire.
XApply the electric parking brake.
XSwitch off the engine.
XRemove the SmartKey from the ignition lock.
or, in vehicles with KEYLESS-GO start-function or KEYLESS ‑GO
XOpen the driver's door.
The vehicle electronics are now in positionu. This is the same as
the key having been removed.
XDo not restart the engine under any circumstances.
XConsult a qualified specialist workshop.
The fuel filler flap cannot
be opened.The fuel filler flap is not unlocked.
XUnlock the vehicle (Ypage 76).
The SmartKey battery is discharged or nearly discharged.
XUnlock the vehicle using the mechanical key (Ypage 78).
The fuel filler flap is unlocked, but the opening mechanism is jammed.
XConsult a qualified specialist workshop.
Parking
Important safety notes
GWARNING
Flammable material such as leaves, grass or
twigs may ignite if they come into contact with
hot parts of the exhaust system or exhaust
gas flow. There is a risk of fire.
Park the vehicle so that no flammable mate-
rials come into contact with parts of the vehi-
cle which are hot. Take particular care not to
park on dry grassland or harvested grain
fields.
Parking143
Driving and parking
Z