ignition MERCEDES-BENZ C-CLASS CABRIOLET 2016 Workshop Manual

Setting the volume:
X Press button :.
If you select the loudest setting, indicator
lamp ;lights up.
You can also adjust the position of the exhaust
flap using the: R DYNAMIC SELECT switch (Y page 141)
R Mercedes-AMG vehicles: multimedia sys-
tem Problems with the engine
Problem
Possible causes/consequences and
M MSolutions The engine does not
start. The HOLD function or DISTRONIC PLUS is activated.
X Deactivate the HOLD function (Y page 179) or DISTRONIC PLUS
(Y page 171).
X Start the engine again (Y page 134).The engine does not
start. The starter motor
can be heard. R
The engine electronics are malfunctioning.
R The fuel supply is malfunctioning.
Before attempting to restart the engine:
X Turn the key back to position uin the ignition lock.
or X Press the Start/Stop button repeatedly until all indicator lamps on
the instrument cluster go out.
X Start the engine again (Y page 134). Avoid excessively long and
frequent attempts to start the engine, as this will drain the battery.
If the engine does not start after several attempts: X Consult a qualified specialist workshop. The engine does not
start. The starter motor
can be heard. The
reserve fuel warning
lamp is lit and the fuel
gauge display is at the
reserve level. The fuel tank is empty.
X Refuel the vehicle. 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.
X Jump-start the vehicle (Y page 333).
If the engine does not start despite attempts to jump-start it:
X Consult a qualified specialist workshop. 140
DrivingDriving and parking

Problem
Possible causes/consequences and
M
MSolutions The starter motor was exposed to excessively high thermal load.
X Start the engine again (Y page 134).
If the engine still does not start: X Consult a qualified specialist workshop. Vehicles with a petrol
engine:
The engine is not running
smoothly and is misfir-
ing. The engine electronics or a mechanical component of the engine
management system are/is malfunctioning.
X Depress the accelerator pedal only slightly.
Otherwise, non-combusted fuel may get into the catalytic converter
and damage it.
X Have the cause rectified immediately at a qualified specialist work-
shop. The coolant temperature
display is showing more
than 120 †. A display
message may also
appear on the multifunc-
tion display and a warn-
ing tone may sound. The coolant level is too low. The coolant is too hot and the engine is not
being cooled sufficiently.
X Stop as soon as possible and allow the engine and the coolant to
cool down.
X Check the coolant level (Y page 312). Observe the warning notes
as you do so and top up the coolant if necessary. If the coolant level is correct, the engine radiator fan may be faulty. The
coolant is too hot and the engine is not being cooled sufficiently.
X If the coolant temperature is below 120 †, you can continue driving
to the nearest qualified specialist workshop.
X Avoid heavy loads on the engine as you do so, e.g. driving in moun-
tainous terrain and stop-start traffic. DYNAMIC SELECT switch
Mercedes-AMG vehicles
General information Use the DYNAMIC SELECT switch to select the
drive program.
Available drive programs:
RACE
(S‑MODEL)
Driving characteristics suit-
able for a race circuit
S+
Sport Plus Particularly sporty driving
characteristics
S
Sport Sporty driving characteris-
tics
C
Comfort Comfortable and economi-
cal driving characteristics
I
Individual Individual settings Depending on the drive program selected, the
following vehicle characteristics will change:
R the engine management
R the transmission management
R the suspension
R the position of the exhaust flap
R the steering
R the availability of the ECO start/stop function
R climate control
R the driver assistance systems
R the availability of gliding mode
Further information for automatic drive program
characteristics (Y page 148).
Additionally, in drive program Iyou can config-
ure the respective vehicle characteristics via the
multimedia system. You can find information
about this in the Digital Owner's Manual.
If the ignition is switched off for less than four
hours, the previously selected drive program is DYNAMIC SELECT switch
141Driving and parking Z

activated when the engine is next started. If the
ignition is switched off for more than four hours,
drive program Cis activated when the engine is
next started.
Selecting the drive program X
Push DYNAMIC SELECT switch :forwards
or back until the desired drive program is
selected.
The status icon of the selected drive program
is shown on the multifunction display.
In addition, the current drive program settings are shown briefly on the multimedia system
display.
You can also shift gears yourself using the steer-
ing wheel gearshift paddles. Further information
on manual gearshifting (Y page 150).
Additional settings :
Position of the exhaust flap (Y page 139)
; ECO start/stop function (Y page 137)
= ESP ®
(Y page 72)
? Suspension (Y page 182)
A To permanently activate manual gearshift-
ing (Y page 150) When you press buttons
:–A, the corre-
sponding setting is selected. The DYNAMIC
SELECT switch setting is overwritten.
If you switch to drive program I, all stored char-
acteristics are applied. This is also the case if
you have previously pressed buttons :–A.
i Mercedes-AMG C 43 4MATIC:
in a few
countries, the ECO start/stop function is
deactivated at the factory due to the quality of the available fuel. In this case, the ECO start/
stop function is not available in any drive pro-
gram, regardless of what is shown on the mul- timedia system display. All other models
Use the DYNAMIC SELECT switch to change the
drive program.
Depending on the drive program selected, the
following vehicle characteristics will change:
R the drive (engine and transmission manage-
ment)
R the suspension
R the steering
R the availability of the ECO start/stop function
R the climate control
- The climate control settings
- The rear window heating operation period
- The performance of the seat heating
If the ignition is switched off for less than four
hours, the previously selected drive program is
activated when the engine is next started. If the
ignition is switched off for more than four hours,
drive program Cis activated when the engine is
next started. DYNAMIC SELECT switch (example)142
DYNAMIC SELECT switchDriving and parking

Children could also set the vehicle in motion,
for example by:
R releasing the parking brake
R shifting the automatic transmission out of
park position P
R starting the engine.
There is a risk of an accident and injury.
When leaving the vehicle, always take the key with you and lock the vehicle. Never leave
children unattended in the vehicle. Always
keep the key out of reach of children.
X If the transmission is in position Dor R: push
the DIRECT SELECT lever up or down to the
first point of resistance.
X If the transmission is in position P: depress
the brake pedal and push the DIRECT SELECT lever up or down to the first point of resist-
ance.
If you switch the engine off with the transmis-
sion in position Ror D, the automatic transmis-
sion shifts to Nautomatically.
With the key: if you then open the driver's door
or the front-passenger door or remove the key
from the ignition, the automatic transmission
shifts to Pautomatically.
With the Start/Stop button: if you then open
the driver's door or the front-passenger door,
the automatic transmission shifts to Pautomat-
ically.
If you want the automatic transmission to
remain in neutral N, e.g. when having the vehicle
cleaned in an automatic car wash with a towing
system:
X Vehicles with KEYLESS-GO or KEYLESS-
GO start function:
remove the Start/Stop
button from the ignition lock.
X Insert the key into the ignition lock.
X All vehicles: switch the ignition on.
X Depress the brake pedal and keep it
depressed.
X Engage neutral N.
X Release the brake pedal.
X Release the electric parking brake.
X Switch off the ignition and leave the key in the
ignition lock. Engaging drive position D X
If the transmission is in position Ror N: push
the DIRECT SELECT lever down past the first
point of resistance.
X If the transmission is in position P: depress
the brake pedal and push the DIRECT SELECT lever down past the first point of resistance. Transmission position and drive pro-
gram display
The current transmission position and drive pro-
gram appear on the multifunction display. :
Status icon, drive program
; Transmission position
= Gear
The arrows in the transmission position display
show how and into which transmission positions
you can shift using the DIRECT SELECT lever.
If the transmission position display on the mul-
tifunction display is not working, you should pull away carefully to check whether the desired
transmission position is engaged. Ideally, you
should select transmission position Dand drive
program E(drive program Cin Mercedes-AMG
vehicles) or S.146
Automatic transmissionDriving and parking

If you or others come into contact with fuel,
observe the following:
R Wash the fuel off any affected areas of skin
with water and soap immediately.
R If you get fuel in your eyes, rinse them thor-
oughly with clean water immediately. Seek
immediate medical attention.
R If fuel is swallowed, seek immediate medi-
cal attention. Do not induce vomiting.
R Change any clothing that has come into
contact with fuel immediately. G
WARNING
Electrostatic charge can cause sparks and
thereby ignite fuel vapours. 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. This discharges any electrostatic
charge that may have built up.
Do not get back into the vehicle during the refu-
elling process, otherwise electrostatic charge
could build up again. G
WARNING
Vehicles with a diesel engine:
If you mix diesel fuel with petrol, the flash
point of this fuel mixture is lower than that of pure diesel fuel. When the engine is running,
components in the exhaust system may over-
heat unnoticed. There is a risk of fire.
Never refuel with petrol. Never add petrol to
diesel fuel.
! Do not use diesel to refuel vehicles with a
petrol 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 can
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.
! Do not use petrol to refuel vehicles with a
diesel engine. Do not switch on the ignition if you accidentally refuel with the wrong fuel.
Otherwise, fuel can enter the fuel system. Even small amounts of the wrong fuel could
result in damage to the fuel system and the
engine. The repair costs are high. 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 fromthe fuel can.
If you overfill the fuel tank, some fuel may spray
out when you remove the fuel pump nozzle.
i Flexible-fuel vehicles can be identified by
the Ethanol up to E85 sticker on the inside of
the fuel filler flap.
Further information on fuel and fuel quality
(Y page 360). Refuelling
General information Pay attention to the important safety notes
(Y
page 153).
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. 154
RefuellingDriving and parking

To open the fuel filler flap
:
To open the fuel filler flap
; To insert the fuel filler cap
= Tyre pressure table
? Instruction label on the fuel type to be refu-
elled
X Switch off the engine.
X Remove the key from the ignition lock.
or, on vehicles with KEYLESS-GO start function
or KEYLESS ‑GO:
X Open the driver's door.
The vehicle electronics now have status 0.
This is the same as the key having been
removed. X
Press the fuel filler flap in the direction of
arrow :.
The fuel filler flap swings open.
X Turn the fuel filler cap anti-clockwise and
remove it.
X Insert the fuel filler cap into the holder on the
inside of fuel filler flap ;.
X Completely insert the filler neck of the fuel
pump nozzle into the tank, hook in place and
refuel.
X Only 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.
Vehicles with a diesel engine: the filler neck is
designed for refuelling at diesel filling pumps.
Closing the fuel filler flap X
Replace the cap on the filler neck and turn
clockwise until it engages audibly.
X Close the fuel filler flap.
Close the fuel filler flap before locking the vehi-
cle. Refuelling
155Driving and parking Z

Problems with the fuel and fuel tank
Problem
Possible causes/consequences and
M
MSolutions Fuel is leaking from the
vehicle.
G
WARNING
The fuel line or the fuel tank is faulty.
There is a risk of fire or explosion. X Apply the electric parking brake.
X Switch off the engine.
X Remove the key from the ignition lock.
or, on vehicles with KEYLESS-GO start function or KEYLESS ‑GO:
X Open the driver's door.
The vehicle electronics now have status 0. This is the same as the
key having been removed.
X Do not restart the engine under any circumstances.
X Consult a qualified specialist workshop. The engine does not
start. The fuel tank of a vehicle with a diesel engine has been run completely
dry.
X Refuel the vehicle with at least 5 l of diesel.
X Turn the ignition on for approximately ten seconds (Y page 133).
X Start the engine continuously for a maximum of ten seconds until it
runs smoothly.
If the engine does not start: X Turn the ignition on again for a maximum of ten seconds
(Y page 133).
X Start the engine again continuously for a maximum of ten seconds
until it runs smoothly.
If the engine does not start after three attempts:
X Consult a qualified specialist workshop. The fuel filler flap cannot
be opened. The fuel filler flap is not unlocked.
X Unlock the vehicle (Y page 82). The key battery is weak or discharged.
X Unlock the vehicle using the emergency key element (Y page 83).The fuel filler flap is unlocked, but the opening mechanism is jammed.
X Consult a qualified specialist workshop. AdBlue
®
(BlueTEC vehicles only)
General notes To function properly, BlueTEC exhaust gas after-
treatment must be operated with the reducing
agent AdBlue ®
. On vehicles with a 8.5
lAdBlue ®
tank, topping
up AdBlue ®
is not part of the maintenance work.
Under normal operating conditions, a full tank of
AdBlue ®
should last until the next service due
date.
When the supply of AdBlue ®
is down to approx-
imately 3.0 l, the Refill AdBlue See
Refill AdBlue See 156
RefuellingDriving an
d parking

Owner’s
Owner’s
Manual
Manualmessage is shown on the mul-
tifunction display.
If you drive the vehicle at a speed greater than
15 km/h after topping up, the Refill
Refill AdBlue AdBlue
See Owner’s Manual
See Owner’s Manual message disappears
after approximately one minute.
When the AdBlue ®
supply drops to a minimum,
the Refill AdBlue No start in ... mi
Refill AdBlue No start in ... mi
message is shown on the multifunction display.
When the Refill
Refill AdBlue AdBlueNo
Nostart
start in
in...
...
mi
mi message is shown on the multifunction dis-
play, you can still drive the vehicle over the dis-
tance shown. If AdBlue ®
is not topped up, you
will subsequently be unable to start the
engine . If theRefill AdBlue Start not
Refill AdBlue Start not
possible
possible message appears on the multifunc-
tion display and the engine does not start, you
must top up AdBlue ®
.
X Add at least 3.5 l of AdBlue ®
.
X Switch on the ignition for at least 60 seconds.
X Start the engine.
i You can also have the AdBlue ®
tank refilled
at a qualified specialist workshop.
Before driving your vehicle outside Europe, have
the AdBlue ®
supply checked at a qualified spe-
cialist workshop.
Further information about BlueTEC exhaust gas
aftertreatment and about AdBlue ®
can
be obtained from any Mercedes-Benz Service
Centre.
Important safety notes AdBlue
®
is a water-soluble fluid for the exhaust
gas aftertreatment of diesel engines. It is:
R non-toxic
R colourless and odourless
R non-flammable
If you open the AdBlue ®
tank, small amounts of
ammonia vapour may be released.
Ammonia vapours have a pungent odour and are
particularly irritating to the skin, mucous mem-
branes and eyes. You may experience a burning sensation in your eyes, nose and throat. You
may also experience coughing and watery eyes.
Do not inhale any ammonia vapours that may be
released. Fill the AdBlue ®
tank only in well-ven-
tilated areas. Do not swallow AdBlue
®
or let it come into con-
tact with your skin, eyes or clothing. Keep
AdBlue ®
away from children.
If you or others come into contact with AdBlue ®
,
observe the following:
R immediately rinse AdBlue ®
off your skin with
soap and water.
R if AdBlue ®
comes into contact with your eyes,
immediately rinse them thoroughly with clean water. Seek medical attention immediately.
R if AdBlue ®
is swallowed, immediately rinse
your mouth out thoroughly. Drink plenty of
water. Seek medical attention immediately.
R change immediately out of clothing that has
come into contact with AdBlue ®
.
! Only use AdBlue ®
in accordance with
ISO 22241. Do not mix any additives with
AdBlue ®
, and do not dilute AdBlue ®
with
water. This may destroy the BlueTEC exhaust
gas aftertreatment system.
! In order to fill the AdBlue ®
tank, the vehicle
must be parked on a level surface. The
AdBlue ®
tank can only be filled as intended
with the vehicle parked on a level surface.
Fluctuations in capacity will thus be avoided.
Filling a vehicle standing on an uneven sur-
face is not permitted. There is a danger of
overfilling, which can cause damage to Blue-
TEC exhaust gas aftertreatment components.
! Surfaces which have come into contact with
AdBlue ®
while refilling should be rinsed
immediately with water, or remove AdBlue ®
with a moist cloth and cold water. If AdBlue ®
has already crystallised, use a sponge and
cold water to clean the area. AdBlue ®
residue
crystallises after a certain amount of time and
soils the affected surfaces.
! AdBlue ®
is not a fuel additive and must not
be added to the fuel tank. If AdBlue ®
is added
to the fuel tank, this can lead to engine dam- age.
Have the AdBlue ®
tank refilled at a qualified
specialist workshop. However, you can also top
up the AdBlue ®
tank:
R at a filling station with an AdBlue ®
filling pump
R with AdBlue ®
refill bottles
R with an AdBlue ®
refill canister Refuelling
157Driving and parking Z

When the pump nozzle switches off automati-
cally during filling at a filling pump, the AdBlue ®
tank has been completely filled. Do not fill the
AdBlue ®
tank any further. AdBlue ®
may leak
out.
To avoid transporting already opened refill con-
tainers in the vehicle, completely empty refill
bottles or canisters when filling the AdBlue ®
tank, if possible.
Further information on AdBlue ®
(Y page 364).
Opening/closing the AdBlue ®
filler cap X
To open:switch the ignition off.
X Press the fuel filler flap in the direction of
arrow :.
The fuel filler flap swings open.
X Turn blue AdBlue ®
filler cap ;anti-clockwise
and remove it.
AdBlue ®
filler cap ;is secured with a plastic
strip.
X To close:fit AdBlue ®
filler cap ;onto the
filler neck and turn it clockwise.
X To close the fuel filler flap, press it in the
direction of arrow :.
X Drive at a speed greater than 15 km/h.
The Refill AdBlue See Owner’s Manual
Refill AdBlue See Owner’s Manual
message disappears after approximately one minute.
If the Refill AdBlue See Owner’s Manual Refill AdBlue See Owner’s Manual
message continues to be shown on the multi-
function display, you must top up with more
AdBlue ®
.
i The fuel filler flap is unlocked or locked
automatically when you unlock or lock the
vehicle. AdBlue
®
refill canisters !
Do not tighten the disposable hose too
firmly. The disposable hose could otherwise
be damaged and AdBlue ®
may leak out. X
Unscrew the cap from the opening on top of
AdBlue ®
refill canister ;.
X Place disposable hose :on the opening of
AdBlue ®
refill canister ;and screw it on
clockwise until hand-tight.
Disposable hose :remains closed until you
fasten disposable hose :to the AdBlue ®
filler neck of the vehicle. X
Place disposable hose :on the filler neck on
the vehicle and screw it on clockwise until
hand-tight. When you feel resistance, dispos- able hose :is sufficiently secured.
X Lift up and tip AdBlue ®
refill canister ;.
Filling stops when the AdBlue ®
tank is com-
pletely filled. Do not fill the AdBlue ®
tank any
further. AdBlue ®
refill canister ;can be
removed when it has been only partially emp-
tied.
X Turn disposable hose :on the filler neck of
the vehicle anti-clockwise and remove it. 158
RefuellingDriving and parking

To ensure that the vehicle is secured against
rolling away unintentionally:
R the electric parking brake must be applied
R on vehicles with manual transmission, engage
first gear or reverse gear
R on vehicles with automatic transmission, the
transmission must be in position Pand the
key must be removed from the ignition lock
R the front wheels must be turned towards the
kerb on steep uphill or downhill gradients
R the empty vehicle must be secured at the
front axle with a wheel chock or similar
object, for example, on uphill or downhill gra-
dients
R on uphill or downhill gradients the laden vehi-
cle must also be secured at the rear axle, for
example with a wheel chock or similar object Switching off the engine
Important safety notes G
WARNING
The automatic transmission switches to neu-
tral position Nwhen you switch off the engine.
The vehicle may roll away. There is a risk of an
accident.
After switching off the engine, always switch
to parking position P. Prevent the parked vehi-
cle from rolling away by applying the parking
brake.
Vehicles with manual transmission X
Shift to either 1st gear or reverse gear R.
X Turn the key to position 0in the ignition lock
and remove it.
The immobiliser is activated.
X Apply the electric parking brake.
Vehicles with automatic transmission X
Apply the electric parking brake.
X Shift the transmission to position P.X
With the key: turn the key to position 0in the
ignition lock and remove it.
The immobiliser is activated.
X With the Start/Stop button: press the
Start/Stop button (Y page 133).
The engine stops and all the indicator lamps in the instrument cluster go out.
When the driver's door is closed, this corre-
sponds to key position 1. When the driver's
door is open, this corresponds to key position
0: "key removed".
If you switch the engine off with the transmis-
sion in position Ror D, the automatic transmis-
sion shifts to Nautomatically.
With the key: if you then open the driver's door
or the front-passenger door or remove the key
from the ignition, the automatic transmission
shifts to Pautomatically.
With the Start/Stop button: if you then open
the driver's door or the front-passenger door,
the automatic transmission shifts to Pautomat-
ically.
If you want the automatic transmission to
remain in neutral N, e.g. when having the vehicle
cleaned in an automatic car wash with a towing
system:
X Vehicles with KEYLESS-GO or KEYLESS-
GO start function:
remove the Start/Stop
button from the ignition lock.
X Insert the key into the ignition lock.
X All vehicles: switch the ignition on.
X Depress the brake pedal and keep it
depressed.
X Shift to neutral N.
X Release the brake pedal.
X Release the electric parking brake.
X Switch off the ignition and leave the key in the
ignition lock.
The engine can be switched off while the vehicle is in motion by pressing and holding the Start/
Stop button for about three seconds. This func- tion operates independently of the ECO start/
stop automatic engine switch-off function. 160
ParkingDriving and parking