key MERCEDES-BENZ C-CLASS CABRIOLET 2016 User Guide

Introduction
The printed Owner's Manual provides informa-
tion about the safe operation of your vehicle.
The Digital Owner's Manual provides compre-
hensive and specifically adapted information on
your vehicle's equipment and multimedia sys-
tem. You can call up the Digital Owner's Manual
via the multimedia system.
i You will not incur any costs when calling up
the Digital Owner's Manual. The Digital Own-
er's Manual works without connecting to the
internet.
There are three ways to access the topics of the Digital Owner's Manual:
R Visual search
The visual search allows you to explore your
vehicle "virtually". Starting from either the
vehicle exterior view or interior view, you can
access many of the different topics covered
by the Digital Owner's Manual. To access the vehicle interior section, select the "Vehicle
interior" view.
R Keyword search
The keyword search allows you to search for a
keyword by entering characters.
R Contents
You can select individual sections in the con-
tents.
i The Digital Owner's Manual is deactivated
for safety reasons while driving. Operation
Calling up the Digital Owner's Manual
X Press the Øbutton on the centre console.
The vehicle overview appears.
X Select the "Owner's Manual" menu item by
turning 3and pressing 7on the control-
ler.
X Confirm 7the message about the warning
and safety notes.
The basic menu for the Digital Owner's Man-
ual appears. Operating the Digital Owner's Manual
General notes Please observe the information about the oper-
ation of the controller (Y page 285).
Content pages You can access the pages of content by means
of a visual search or a keyword search or by
using the table of contents.
X
To scroll forwards/backwards: turn the
controller 3.
X To display in full screen or animation: slide
8 the controller to the left :.
X To select information text or save book-
marks:
slide9 the controller to the
right ;.
X To select a link: slide6the controller
downwards =.
X To exit a content page: select the%?
symbol.
X To call up the basic menu of the Digital
Owner's Manual:
select theÞAsymbol.
X To switch functions to the multimedia
system using the buttons on the centre
console:
press the $,%, ÕorØ
button.
The selected menu appears. The Digital Own- er's Manual remains open in the background. 26
Digital Owner's Manual

Panic alarm
X
To activate: press and hold the !but-
ton :for approximately one second.
A visual and audible alarm is triggered if the
alarm system is activated.
X To deactivate: press the!button :
again.
or X Insert the key into the ignition lock.
or X Vehicles with KEYLESS-GO start function
or KEYLESS-GO: press the Start/Stop but-
ton.
The key must be in the vehicle.
The panic alarm function is available only in cer-
tain countries. Occupant safety
Introduction to the restraint system
The restraint system can reduce the risk of vehi-
cle occupants coming into contact with parts of
the vehicle's interior in the event of an accident. Furthermore, the restraint system can also
reduce the forces to which vehicle occupants
are subjected during an accident.
The restraint system includes:
R Seat belt system
R Airbags
R Child restraint system
R Child seat securing system The various components of the restraint system
work complementary to one another. They can
only perform their intended protective function
if all vehicle occupants:
R have correctly fastened their seat belt
(Y page 45)
R have correctly adjusted their seat and head
restraint (Y page 100).
As the driver, you must also ensure that the
steering wheel is correctly adjusted. Observe
the information relating to the correct driver's
seat position (Y page 100).
Additionally, you must ensure that an airbag can
deploy freely (Y page 48).
The airbag is supplementary to a correctly fas-
tened seat belt. As an additional safety device,
the airbag increases the level of protection for
vehicle occupants in the event of an accident. If the protection provided by the seat belt is suf-
ficient, the airbags do not deploy. Furthermore,
in the event of an accident, only airbags which
provide greater protection in the given accident situation deploy. However, seat belts and air-
bags generally do not protect against objects
penetrating the vehicle from the outside.
Information on how the restraint system oper-
ates can be found in "Deployment of the seat
belt tensioner and airbags" (Y page 56).
See "Children in the vehicle" for information on
infants and children traveling with you in the
vehicle restraint systems for infants and chil-
dren(Y page 59). Important safety notes
G
WARNING
If the restraint system is modified, it may no
longer work as intended. The restraint system
may then not perform its intended protective function by failing in an accident or triggering
unexpectedly, for example. There is an
increased risk of injury, possibly even fatal.
Never modify parts of the restraint system. Do not attempt to modify the wiring as well as
electronic components or their software.
If the vehicle needs to be adapted to accommo- date a person with disabilities, please contact a
specialist workshop. 42
Occupant safetySafety

If such objects are located on or in your cloth-
ing, e.g. pens, keys, spectacles, etc. stow
these in a suitable location.
R Only one person should use each seat belt at
any one time.
Babies and children must never travel sitting
on the lap of another vehicle occupant. In the event of an accident, they could be crushed
between the vehicle occupant and seat belt.
R Do not secure any objects with a seat belt if
the seat belt is being used by one of the vehi- cle's occupants.
You must also make sure that objects, e.g.
cushions, are never placed between a person
and the seat.
Seat belts are solely intended to secure and
restrain persons. To secure objects, luggage or
loads, always observe the "Loading guidelines"
(Y page 296).
Fastening the seat belts Observe the safety notes on the seat belt
(Y
page 44) and the information on the correct
use of the seat belt (Y page 45).G
WARNING
If the seat-belt extender extends during the
journey, the seat belt is not sitting correctly
across your body. The seat belt then cannot
perform its intended protective function.
There is an increased risk of injury, possibly
even fatal.
During a journey, make sure that the seat-belt extender is retracted.
If the seat-belt extender does not retract auto-
matically, you can return it manually. Press the
seat-belt extender back to the stop before start-
ing the vehicle to do so. Returning the seat-belt
extender requires force. The seat-belt extender for the driver and front
passenger helps you fasten your seat belt. Seat- belt extender =is extended when the respec-
tive door is closed. You can also extend seat-belt extender
=with
seat-belt extender button ?.
X Turn the key to position 1or 2in the ignition
lock.
X Press seat-belt extender button ?.
Seat-belt extender =extends.
Seat-belt extender =is retracted again if:
R the belt tongue is engaged in the seat belt
buckle
R the belt tongue is not engaged in the seat belt
buckle within 60 seconds
In this case, you can extend seat-belt
extender =again. Press seat-belt extender
button ?again.
R the respective door is opened
R you release the seat backrest and fold it for-
wards
R the front-passenger seat remains unoccupied
If you then press seat-belt extender but-
ton ?, seat-belt extender =will not extend. 46
Occupant safetySafety

front-passenger seat. The child restraint system
must not touch the roof or be put under strain bythe head restraint. Adjust the angle of the seat
backrest and the head restraint position accord-
ingly. Only then is the correct function of the
automatic front-passenger front airbag deacti-
vation system guaranteed. Always observe the
information on suitable positioning of the child
restraint system (Y page 62) in addition to the
child restraint system manufacturer's installa-
tion instructions.
Operation of automatic front-passenger
front airbag deactivation :
PASSENGER AIR BAG ON indicator lamp
; PASSENGER AIR BAG OFF indicator lamp
The indicator lamps inform you whether the
front-passenger front airbag is disabled or ena-
bled.
X Press the Start/Stop button once or twice, or
turn the key to position 1or 2in the ignition
lock.
The system carries out a self-diagnosis.
The PASSENGER AIR BAG OFF and PASSENGER
AIR BAG ON indicator lamps must light up simul- taneously for approximately six seconds.
The indicator lamps display the status of the
front-passenger front airbag:
R PASSENGER AIR BAG ON lights up for 60 sec-
onds, then both indicator lamps are off
(PASSENGER AIR BAG ON and OFF): the front-
passenger front airbag is able to deploy in the
event of an accident.
R PASSENGER AIR BAG OFF lights up: the front-
passenger front airbag is disabled. It will then
not be deployed in the event of an accident.
If the PASSENGER AIR BAG ON indicator lamp is
off, only the PASSENGER AIR BAG OFF indicator lamp shows the status of the front-passenger front airbag. The PASSENGER AIR BAG OFF indi-
cator lamp may be lit continuously or be off.
If the status of the front-passenger front airbag
changes while the vehicle is in motion, an airbag display message appears on the instrument
cluster (Y page 251). When the front-passenger
seat is occupied, always pay attention to the
PASSENGER AIR BAG OFF indicator lamp. Be
aware of the status of the front-passenger front
airbag both before and during the journey.
If a person sits in the passenger seat, he/she
must be:
R seated with the seat belt fastened correctly
R in an almost upright position with his/her
back against the seat backrest
R with his/her feet resting on the floor, if pos-
sible
If the front passenger does not observe these
conditions, the automatic front-passenger front
airbag deactivation system may be influenced,
e.g. because the front passenger:
R transfers his/her weight by supporting him-
self/herself on a vehicle armrest
R sits in such a way that his/her weight is raised
from the seat cushion
The front-passenger front airbag may be disa-
bled by mistake as a result of these or similar
actions. In this case, the PASSENGER AIR BAG
OFF indicator lamp lights up permanently. The
front-passenger front airbag then does not
deploy during an accident. G
WARNING
If the PASSENGER AIRBAG OFF indicator lamp is lit, the front-passenger front airbag is disa-
bled. It will not be deployed in the event of an
accident and cannot perform its intended pro-
tective function. A person in the front-
passenger seat could then, for example, come
into contact with the vehicle's interior, espe-
cially if the person is sitting too close to the
dashboard. This poses an increased risk of
injury or even fatal injury.
When the front-passenger seat is occupied,
always make sure that:
R the classification of the person in the front-
passenger seat is correct and that the front-
passenger front airbag is enabled or disa- Occupant safety
51Safety
Z

Automatic measures after an acci-
dent
Immediately after an accident, the following
measures are implemented, depending on the
type and severity of the impact:
R the hazard lamps are switched on
R the emergency lighting is switched on
R the vehicle doors are unlocked
R the front side windows are lowered
R vehicles with the memory function: the elec-
trically adjustable steering wheel is raised
R the engine is switched off and the fuel supply
is cut off
R vehicles with the Mercedes-Benz emergency
call system: automatic emergency call Children in the vehicle
Important safety notes
Accident statistics show that children secured
in the rear seats are safer than children secured in the front-passenger seat. For this reason,
Mercedes-Benz strongly advises that you install
a child restraint system on a rear seat. Children are generally better protected there.
If a child younger than twelve years old and
under 1.50 min height is travelling in the vehi-
cle:
R always secure the child in a child restraint
system suitable for Mercedes-Benz vehicles.
The child restraint system must be appropri-
ate to the age, weight and size of the child.
R be sure to observe the instructions and safety
notes in this section in addition to the child
restraint system manufacturer's installation
instructions.
R be sure to observe the instructions and safety
notes on the automatic front-passenger front airbag deactivation system (Y page 50). G
WARNING
If you leave children unattended in the vehi-
cle, they may be able to set the vehicle in
motion if, for example, they:
R release the parking brake
R shift the automatic transmission out of park
position Por shift manual transmission into
neutral
R start the engine
In addition, they may operate vehicle equip-
ment and become trapped. 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. G
WARNING
If persons (particularly children) are exposed
to heat or cold for a prolonged period, there is a risk of serious or even fatal injuries. Never
leave persons (particularly children) unatten-
ded in the vehicle. G
WARNING
If the child restraint system is placed in direct sunlight, the parts could become very hot.
Children could be suffer burns by touching
these parts, in particular on the metallic parts
of the child restraint system. There is a risk of injury.
If you and your child leave the vehicle, always
make sure that the child restraint system is
not in direct sunlight. Cover it with a blanket, for example. If the child restraint system has
been exposed to direct sunlight, leave it to
cool down before securing the child in it.
Never leave children unattended in the vehi-
cle.
Always ensure that all vehicle occupants have
their seat belts fastened correctly and are sitting
properly. Particular attention must be paid to
children.
Observe the safety notes on the seat belt
(Y page 44) and the information on the correct
use of the seat belt (Y page 45). Children in the vehicle
59Safety Z

You can prevent the engagement of PRE-SAFE
®
Brake at any time by:
R depressing the accelerator pedal further
R activating kickdown
R releasing the brake pedal
The braking action of PRE-SAFE ®
Brake is ended
automatically if:
R you manoeuvre to avoid the obstacle
R the danger of collision has passed
R an obstacle is no longer detected in front of
your vehicle STEER CONTROL
General information STEER CONTROL helps you by transmitting a
noticeable steering force to the steering wheel
in the direction required for vehicle stabilisation.
This steering support is provided in particular if:
R both right wheels or both left wheels are on a
wet or slippery road surface when you brake
R the vehicle begins to skid
Important safety notes i
Observe the "Important safety notes" sec-
tion (Y page 67).
No steering support is provided from STEER
CONTROL, if:
R ESP ®
is deactivated
R ESP ®
is malfunctioning
R the steering is faulty
If ESP ®
is malfunctioning, you will be assisted
further by the electrical power steering. Protection against theft
Immobiliser
The immobiliser prevents your vehicle from
being started without the correct key.
X To activate with the key: remove the key
from the ignition lock.
X To activate with KEYLESS-GO start func-
tion or KEYLESS-GO: switch the ignition off
and open the driver's door.
X To deactivate: switch on the ignition. When leaving the vehicle, always take the key
with you and lock the vehicle. Anyone can start
the engine if a valid key has been left inside the vehicle.
i The immobiliser is always deactivated when
you start the engine. ATA (Anti-Theft Alarm system)
X
To activate: lock the vehicle with the key or
KEYLESS-GO.
Indicator lamp :flashes. The alarm system
is activated after approximately ten seconds.
X To deactivate: unlock the vehicle with the
key or KEYLESS-GO.
or X Insert the key into the ignition lock.
or X Vehicles with KEYLESS-GO start function
or KEYLESS-GO: press the Start/Stop but-
ton.
The key must be in the vehicle.
A visual and audible alarm is triggered if the
alarm system is activated and you open: R a door
R the vehicle with the emergency key element
R the boot lid
R the bonnet
R the stowage compartment / telephone com-
partment under the armrest in vehicles with
automatic transmission
X To stop the alarm with the key: press the
% or& button on the key.
The alarm stops.
or 78
Protection against theftSafety

X
Vehicles with KEYLESS-GO start function
or KEYLESS-GO: remove the Start/Stop but-
ton from the ignition lock (Y page 133).
X Insert the key into the ignition lock.
The alarm stops.
X To stop the alarm using KEYLESS-GO:
grasp the outside door handle. The key must
be outside the vehicle.
The alarm stops.
or X Press the Start/Stop button on the dash-
board. The key must be inside the vehicle.
The alarm stops.
The alarm does not stop, even if you close the
open door that has triggered it, for example.
i If the alarm stays on for more than
30 seconds, the Mercedes‑Benz emergency
call system automatically sends a message to
the Customer Centre. This is sent via text
message or a data connection.
The emergency call system sends a message
or establishes a data connection provided
that:
R you have subscribed to the Mercedes‑Benz
emergency call system
R the Mercedes‑ Benz emergency call system
has been activated properly
R the necessary mobile phone network is
available Tow-away protection
Function An audible and visual alarm is triggered if your
vehicle's angle of inclination is altered while
tow-away protection is primed. This can occur if
the vehicle is jacked up on one side, for exam-
ple.
Activating/deactivating Tow-away protection is automatically switched
on and off with the ATA (anti-theft alarm system) when:
R the doors are closed
R the boot lid is closed
Tow-away protection is active around
60 seconds after the ATA has been switched on (Y page 78). Deactivating To prevent a false alarm, deactivate tow-away
protection if you lock your vehicle and it:
R is being transported
R is being loaded, e.g. onto a ferry or car trans-
porter
R is parked on a movable surface, e.g. in a split-
level garage
The tow-away alarm remains deactivated until
you switch the ATA on again after opening a
door.
You can deactivate tow-away protection via the
multimedia system (see the Digital Owner's
Manual). Interior motion sensor
Function When the interior motion sensor is switched on,
a visual and audible alarm is triggered if move-
ment is detected in the vehicle interior. This can occur if someone reaches into the vehicle inte-
rior, for example.
Switching on/off The interior motion sensor is automatically
switched on and off with the ATA (Anti-Theft
Alarm system) when:
R the doors are closed
R the boot lid is closed
The interior motion sensor is active around ten
seconds after the ATA has been switched on
(Y page 78).
You can prevent false alarms by doing the fol-
lowing before switching on the ATA:
R close the side windows
R close the soft top
R make sure that no objects, such as mascots,
are attached to the rear-view mirror
Deactivating If you want to lock your vehicle and people or
animals are inside it, you can deactivate the
interior motion sensor.
The interior motion sensor remains deactivated
until you switch the ATA on again after opening
a door. Protection against theft
79Safety Z

Key
Important safety notes
United Kingdom only: G
WARNING
When the double locks are activated, the
doors can no longer be opened from the
inside. People in the vehicle can no longer get out, e.g. in hazardous situations. There is a
risk of injury.
Therefore, do not leave any people unsuper-
vised in the vehicle, particularly children, eld-
erly people or people in need of special assis-
tance. Do not activate the double lock when
people are in the vehicle.
If the vehicle has been locked from the outside, the double lock function is activated as stand-
ard. It is then not possible to open the doors
from inside the vehicle. You can deactivate the
double lock function by deactivating the interior
motion sensor (see Digital Owner's Manual).
The doors can then be opened from the inside
after the vehicle has been locked from the out-
side. The anti-theft alarm system is triggered if
the door is opened from the inside. Switch off
the alarm (Y page 78).
All countries: 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 oncoming traffic
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 P or shift manual transmission into
neutral
R start 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 and animals unattended in the vehi-
cle. Keep the keys out of the reach of children. G
WARNING
If you attach heavy or large objects to the key, the key could be unintentionally 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 objects to the
key. Remove any bulky keyrings before insert-
ing the key into the ignition lock.
! Keep the key away from strong magnetic
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 key: R with electronic devices, e.g. a mobile phone
or another key
R with metallic objects, e.g. coins or metal foil
R inside metallic objects, e.g. a metal case
This can impair the key's function.
Vehicles with KEYLESS-GO start function: do
not keep the key in the boot. Otherwise, the key
may not be detected, e.g. when starting the
engine using the Start/Stop button.
A check that periodically establishes a radio
connection between the vehicle and the key
determines whether a valid key is in or in the
direct vicinity of the vehicle. This occurs, for
example:
R during engine start
R during driving
R when the external door handles are touched
R during convenience closing Key
81Opening and closing Z

Key functions
:
& Locks the vehicle
; F Opens the boot lid
= % Unlocks the vehicle
X To unlock centrally: press the%button.
If you do not open the vehicle within approx-
imately 40 seconds of unlocking:
R the vehicle locks again
R protection against theft is reactivated
X To lock centrally: press the&button.
The key centrally locks and unlocks the follow-
ing components:
R the doors
R the boot lid
R the glove compartment
R the fuel filler flap
During unlocking, the turn signals flash once.
During locking, they flash three times.
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 Digital Owner's Man-
ual).
Only when all the components have been locked is the visual or audible locking confirmation
issued.
When the locator lighting is activated via the
multimedia system, it lights up when it is dark
after the vehicle is unlocked with the key (see
Digital Owner's Manual).
X To open the boot lid automatically from
outside the vehicle: press and hold theF
button until the boot lid opens. KEYLESS-GO
General notes Note that the engine can be started by any of the
vehicle occupants if there is a key in the vehicle
(Y page 135).
Locking and unlocking centrally You can start, lock or unlock the vehicle using
KEYLESS-GO. To do this, you need to carry the
key with you. You can combine the KEYLESS-GO functions with the functions of a conventional
key. Unlock the vehicle using KEYLESS-GO, for
instance, and lock it using the &button on
the key.
The driver's door and the door at which the han- dle is used must both be closed. The key must beoutside the vehicle. When you lock or unlock the
vehicle with KEYLESS-GO, the distance between the key and the door handle must not be greater
than 1 m.
A check that periodically establishes a radio
connection between the vehicle and the key
determines whether a valid key is in or in the
direct vicinity of the vehicle. This occurs, for
example:
R during engine start
R during driving
R when the external door handles are touched
R during convenience closing X
To unlock the vehicle: touch the inner sur-
face of the door handle.
X To lock the vehicle: touch sensor surface :
or ;. 82
KeyOpening and closing

Make sure that you do not touch the inner
surface of the door handle.
X Convenience closing feature: touch
recessed sensor surface ;for an extended
period.
Deactivating and activating If you do not intend to use a key for an extended
period of time, you can deactivate the KEYLESS-
GO function of the key. The key will then use very
little power, thereby conserving battery power.
For the purposes of activation or deactivation,
the vehicle does not have to be nearby.
X To deactivate: press the&button on the
key twice in rapid succession.
The battery indicator lamp (Y page 84) of
the key flashes twice briefly and lights up
once, then KEYLESS-GO is deactivated.
X To activate: press any button on the key.
or X Insert the key into the ignition lock.
KEYLESS-GO and all its associated features
are available again. KEYLESS-GO start function
General notes Bear in mind that the engine can be started by
any of the vehicle occupants if there is a key in
the vehicle (Y
page 135). Changing the settings of the locking
system
You can change the settings of the locking sys-
tem. This means that only the driver's door and
the fuel filler flap are unlocked when the vehicle is unlocked. This is useful if you frequently travel
alone.
X To change the setting: simultaneously press
the % and& buttons for approximately
six seconds until the battery check lamp
(Y page 84) flashes twice.
If the setting of the locking system is changed
within the signal range of the vehicle, pressing
the & or% button:
R locks or
R unlocks the vehicle The key now functions as follows:
X To unlock: press the%button once.
X To unlock centrally: press the%button
twice.
X To lock: press the &button.
The KEYLESS-GO functions can be changed as
follows: X To unlock the driver's door: touch the inner
surface of the door handle on the driver's
door.
X To unlock centrally: touch the inner surface
of the front-passenger door handle.
X To lock centrally: touch the outer sensor
surface on one of the door handles.
X To restore the factory settings: press and
hold the %and& buttons simultane-
ously for approximately six seconds until the
battery check lamp (Y page 84) flashes
twice. Emergency key element
General notes If the vehicle can no longer be unlocked with the
key or KEYLESS-GO, use the emergency key ele-
ment.
If you use the emergency key element to unlock
and open the driver's door, the anti-theft alarm
system will be triggered. Switch off the alarm
(Y page 78).
If you unlock the vehicle using the emergency
key element, the fuel filler flap will not be
unlocked automatically.
X To unlock the fuel filler flap: insert the key
into the ignition lock. Key
83Opening and closing Z