2016 MERCEDES-BENZ C-CLASS CABRIOLET key

Display messages
Possible causes/consequences and
M
MSolutions j
Check Check
trailer
trailer hitch
hitch
lock
lock The trailer tow hitch is not correctly engaged.
A warning tone also sounds.
G WARNING
If the ball coupling is not engaged, the trailer may come loose. There
is a risk of an accident.
X Stop the vehicle immediately, paying attention to road and traffic
conditions, and switch off the engine.
X Secure the vehicle against rolling away (Y page 159).
X Engage the ball coupling of the trailer tow hitch in the end position
(Y page 214). Ð
Power steering mal‐ Power steering mal‐
function See Own‐ function See Own‐
er's Manual er's Manual The power steering assistance is faulty.
A warning tone also sounds.
G WARNING
You will need to use more force to steer.
There is a risk of an accident.
X Check whether you are able to apply the extra steering force
required.
If you are able to steer safely:
X Drive on carefully.
X Consult a qualified specialist workshop immediately.
If you are unable to steer safely:
X Do not drive on.
X Consult a qualified specialist workshop. Ð
Steering malfunc‐ Steering malfunc‐
tion See Owner's tion See Owner's
Manual Manual Vehicles with manual transmission:
The electric steering lock is malfunctioning.
G WARNING
The steering may be locked by the electric steering lock.
There is a risk of an accident.
X Stop the vehicle safely as soon as possible, paying attention to road
and traffic conditions.
X Secure the vehicle against rolling away (Y page 159).
X Do not drive on.
X Consult a qualified specialist workshop. _
Before Before
starting
starting the
the
engine, turn the
engine, turn the
steering wheel. steering wheel. Vehicles with manual transmission:
The electric steering lock is malfunctioning.
X Remove the key from the ignition lock.
X To unlock the steering, move the steering wheel slightly.
X Insert the key into the ignition lock again. 270
Display
messagesOn-board computer and displays

Key
Display messages
Possible causes/consequences and
M
MSolutions Â
Key Key
does
does not
notbelong
belong
to vehicle
to vehicle You have put the wrong key in the ignition lock.
X Use the correct key. Â
Replace key Replace key The key needs to be replaced.
X Consult a qualified specialist workshop. Â
Change Change
key
keybatteries
batteries The key battery is discharged.
X Replace the batteries (Y page 84).Â
Key not detected Key not detected
(white display message) The key is currently undetected.
X Change the location of the key in the vehicle.
If the key still cannot be detected:
X Insert the key into the ignition lock and turn it to the desired posi-
tion. Â
Key not detected Key not detected
(red display message) The key is not in the vehicle.
A warning tone also sounds.
If the engine is switched off, you can no longer lock the vehicle cen-
trally or start the engine.
X Stop the vehicle immediately, paying attention to road and traffic
conditions.
X Secure the vehicle against rolling (Y page 159).
X Locate the key.
X Press aon the steering wheel to confirm the display message. Because there is interference from a strong source of radio waves, the
key is not detected whilst the engine is running.
A warning tone also sounds.
X Stop the vehicle immediately, paying attention to road and traffic
conditions.
X Secure the vehicle against rolling (Y page 159).
X Insert the key into the ignition lock and bring into key mode. Â
Remove Remove
starting
starting but‐
but‐
ton,
ton, then
theninsert
insert key
key The key is continually undetected.
The key detection function has a temporary malfunction or is faulty. A
warning tone also sounds.
X Insert the key into the ignition lock and turn it to the desired posi-
tion.
X Consult a qualified specialist workshop. 272
Display
messagesOn-board computer and displays

The route calculation includes roads which
require you to pay a usage fee (toll).
R Use vignette roads Use vignette roads (not available in all
countries)
The route calculation includes roads which
require you to pay a time-based fee (vignette).
A vignette allows temporary use of the route
network, e. g. 10 days or 1 year.
Entering an address Multimedia system:
X Select Navi
NaviQNavigation Navigation.
X Select Destination
Destination QAddress entryAddress entry.
i If route guidance is active, first slide
6the
controller and show the menu.
Enter an address, e.g. as follows:
R town or postcode, street, house number
R country, town or postcode
R town or postcode, centre
R street, town or postcode, junction
X Select Town
Town.
The town in which the vehicle is currently
located (current vehicle position) is at the top.
Below this, you will see locations for which
route guidance has already been carried out.
X Enter the town.
The Gsymbol: the location is contained on
the digital map multiple times.
X To switch to the list: slide5the control-
ler.
X Select the location.
If available, the postcode is shown. If there
are different postcodes available for the loca-
tion, the corresponding digits are displayed
with an X
X.
X Enter the street and house number.
The address is in the menu.
Further options for destination entry:
R Keyword search
The keyword search finds destinations using
fragments of words.
R select the last destination
R select a contact
R select a POI
You can search for a POI by location, name or
telephone number.
R select destination on the map
R enter intermediate destination You can map the route to the destination
yourself with up to four intermediate destina-
tions.
R select travel guide destination (only available
for selected European countries)
R select destinations from Mercedes-Benz
Apps
R select geo-coordinates
Calculating the route Prerequisite: the address has been entered and
is in the menu.
X Select Start StartorContinue
Continue.
The route is calculated with the selected route
type and the selected route options.
If route guidance has already been activated,
a prompt will appear asking whether you wish to end the current route guidance.
X Select Yes
YesorSet as intermediate des‐
Set as intermediate des‐
tination
tination.
Yes Yes cancels the current route guidance and
starts route calculation to the new destina-
tion.
Set as intermediate destination Set as intermediate destination adds
the new destination in addition to the existing
destination and opens the intermediate des-
tinations list. Connecting the mobile phone
Requirements For telephony via the Bluetooth
®
interface, you
require a Bluetooth ®
-capable mobile phone. The
mobile phone must support Hands-Free Profile
1.0 or above.
Multimedia system:
X Select Vehicle VehicleQSystem set‐ System set‐
tings
tingsQActivate Bluetooth Activate Bluetooth.
X Activate Bluetooth ®
O.
Mobile phone:
X Activate Bluetooth ®
and, if necessary, Blue-
tooth ®
visibility for other devices (see the
manufacturer's operating instructions).
The Bluetooth ®
device names for all of one man-
ufacturer's products might be identical. To
make it possible to clearly identify your mobile
phone, change the device name (see the man-
ufacturer's operating instructions). 290
Operating systemMultimedia system

If the mobile phone supports the PBAP (Phone
Book Access Profile) and MAP (Message
Access Profile) Bluetooth ®
profiles, the follow-
ing information will be transmitted after you
connect:
R Phone book
R Call lists
R Messages
i Further information on suitable mobile
phones can be obtained on the Internet at:
http://www.mercedes-benz.com/
connect
Searching for and authorising a mobile
phone Before using your mobile phone with the multi-
media system for the first time, you will need to
search for the phone and then authorise (con-
nect) it. Depending on the mobile phone, author-
isation takes place by means of Secure Simple
Pairing or by entering a passkey. The multimedia
system automatically makes the procedure that is relevant for your mobile phone available. The
mobile phone is always connected automati-
cally after authorisation. Further information on using a mobile phone with the multimedia sys-
tem (see the Digital Owner's Manual).
If the multimedia system does not detect your
mobile phone, this may be due to particular
security settings on your mobile phone (see the manufacturer's operating instructions).
Only one mobile phone can be connected to the
multimedia system at any one time.
Searching for a mobile phone
Audio 20:
X Select Tel/
Tel/®QConnect Connect
device deviceQSearch for phones Search for phonesQStart Start
search
search .
The available mobile phones are displayed.
COMAND Online:
X Select Telephone
TelephoneQConnect Connect
device
deviceQSearch for phones Search for phonesQStart Start
search
search .
The available mobile phones are displayed. Symbols in the device list Sym-
bol Explanation
Ï
New mobile phone found, not yet
authorised.
Ñ
Mobile phone is authorised, but is
not connected.
#
Mobile phone is authorised and
connected.
Connecting the mobile phone
Authorisation using Secure Simple Pairing:
X Select the mobile phone.
A code is displayed in the multimedia system
and on the mobile phone.
X If codes match: selectYes Yeson the multimedia
system.
X Confirm the code on the mobile phone.
Depending on the mobile phone used, con-
firm the connection to the multimedia system
and for the PBAP and MAP Bluetooth ®
pro-
files. The prompt to confirm may take up to
two minutes to be displayed (see the manu-
facturer's operating instructions).
X If the codes are different: selectNo Noon the
multimedia system.
The process is cancelled.
Repeat authorisation.
Authorisation by entering a passkey (passcode): X Select the Bluetooth ®
name of the mobile
phone.
The input menu for the passkey is displayed.
X Choose a one- to sixteen-digit number com-
bination as a passkey.
X Enter the passkey on the multimedia system.
X Press ¬to confirm.
X Enter and confirm the passkey on the mobile
phone. Depending on the mobile phone used,
confirm the connection to the multimedia sys-
tem and for the PBAP and MAP Bluetooth ®
profiles. The prompt to confirm may take up
to two minutes to be displayed (see the man- ufacturer's operating instructions).
i Mobile phones that are connected to the
optionally available telephone module with
Bluetooth ®
(SAP profile) are displayed sepa- Operating system
291Multimedia system Z

Front stowage compartments
Glove compartment
X
To open: pull handle :and open glove com-
partment flap ;.
X To close: fold glove compartment flap ;
upwards until it engages. The glove compartment can only be locked and
unlocked using the emergency key element
(Y page 83).
X To lock: insert the emergency key element
into the lock and turn it 90° clockwise to
position 2.
X To unlock: insert the emergency key element
into the lock and turn it 90° anti-clockwise to
position 1. Spectacles compartment X
To open: press marking :.
The spectacles compartment opens down-
wards.
Make sure that the spectacles compartment is
always closed while the vehicle is in motion.
Stowage compartment in the front centre
console Stowage compartment (example)
X Briefly press trim element ;in the direction
of the arrow.
Cover :swings upwards. Stowage areas
297Stowing and featu res Z

X
To open: open the stowage compartment
(Y page 297).
X Push the cover of the ashtray upwards on its
right side =.
X To remove the insert: hold the sides of
insert ?, push it forwards slightly and lift it
up ; and out.
X To refit the insert: press insert?into the
holder until it engages.
X To close: close the cover of the ashtray.
X Push cover :of the stowage compartment
closed.
i You can remove the ashtray insert and use
the resultant compartment for stowage.
Rear-compartment ashtray X
To open: pull cover ;out by its top handle
edge.
X To remove the insert: push ribbing=from
the left side and pull insert :up and out.
X To fit the insert: fit insert:into the holder
from above and press down into the holder
until it engages. Cigarette lighter
G
WARNING
You can burn yourself if you touch the hot
heating element or the socket of the cigarette lighter.
In addition, flammable materials can ignite if:
R the hot cigarette lighter falls
R a child holds the hot cigarette lighter to
objects, for example
There is a risk of fire and injury.
Always hold the cigarette lighter by the knob.
Always make sure that the cigarette lighter is
out of reach of children. Never leave children unattended in the vehicle.
Your attention must always be focused on the
traffic conditions. Use the cigarette lighter only when road and traffic conditions permit. Cigarette lighter (example)
X Turn the key to position 2in the ignition lock
(Y page 133).
X To open: open the stowage compartment
(Y page 297).
X Press in cigarette lighter ;.
Cigarette lighter ;will pop out automatically
when the heating element is red-hot.
X To close: push cover :of the stowage com-
partment closed. 12 V sockets
General notes X
Turn the key to position 1in the ignition lock
(Y page 133). Features
303Stowing an d features Z

cause you to lose control of the vehicle. There
is a risk of an accident.
Use this device only when the vehicle is sta-
tionary.
You must observe the legal requirements for the country in which you are currently driving whenoperating mobile communications equipment in
the vehicle.
If it is permitted by law to operate communica-
tions equipment while the vehicle is in motion,
you may do so only if the traffic situation per-
mits. You may otherwise be distracted from the traffic conditions, cause an accident and injure
yourself and others.
Excessive levels of electromagnetic radiation
may cause damage to your health and to the
health of others. The use of an exterior aerial
takes into consideration the scientific discus-
sion surrounding the possible health risk posed
by electromagnetic fields.
Mercedes-Benz recommends the use of an
approved exterior aerial. This ensures:
R optimal mobile phone reception quality in the
vehicle
R that mutual interference between the vehicle
electronics and mobile phones is minimised
An exterior aerial has the following advantages:
R it conducts the electromagnetic fields gener-
ated by a wireless device to the exterior
R the field strength in the vehicle interior is
lower than in a vehicle that does not have an exterior aerial
Information on retrofitting two-way radios and
mobile phones (RF transmitters) (Y page 358).
General notes Depending on the vehicle equipment, there are
various mobile phone brackets that may be fit-
ted in your vehicle; in some cases, these are
country-specific.
More information on suitable mobile phones,
mobile phone brackets and on connecting Blue-
tooth ®
-capable mobile phones with the multi-
media system can be obtained:
R at a qualified specialist workshop
R on the internet at http://www.mercedes-
benz.com/connect The functions and services available when you
use the phone depend on your mobile phone
model and service provider.
Using a mobile phone To connect a mobile phone to the exterior aerial
and charge it, insert it into the mobile phone
bracket.
X Open the telephone compartment
(Y page 298).
X Place the mobile phone bracket into the pre-
installed fitting; see the separate installation
instructions for the mobile phone fitting.
X Insert the mobile phone into the mobile phone
bracket; see the separate installation instruc-
tions for the mobile phone fitting.
i The mobile phone can also be operated
without being in the bracket. However, the
charging function and aerial function are not
available.
In order to use Bluetooth ®
(SAP profile) on your
telephone module, you must first insert the tele-
phone module into the pre-installed fitting. This connects it to the exterior aerial. If you wish to
charge the mobile phone, you must connect it to
a USB port.
Further information on the telephone module
with Bluetooth ®
(SAP profile) can be found in the
Digital Owner's Manual.
Operating the mobile phone You can operate the phone using the
6and
~ buttons on the multifunction steering
wheel. You can operate other mobile phone
functions via the on-board computer
(Y page 230).
When you remove the key from the ignition lock, the mobile phone is disconnected from the vehi-cle. You can then no longer make calls using the
hands-free system.
If a call is active and you remove the key from
the ignition lock, the conversation is transferred
over to the mobile phone. It is then possible to
continue the conversation on the mobile phone. 306
FeaturesStowing and features

cap, you could be scalded if hot coolant
sprays out. There is a risk of injury.
Let the engine cool down before you open the cap. Wear gloves and eye protection. Open
the cap slowly to release the pressure. G
WARNING
If you open the bonnet while the engine is
overheating or while there is a fire in the
engine compartment, you could come into
contact with hot gases or other leaking ser-
vice products. There is a danger of injury.
Allow an overheating engine to cool down
before opening the bonnet. If there is a fire in the engine compartment, leave the bonnet
closed and notify the fire brigade.
Checking the coolant level Check the coolant level (example)
X Park the vehicle on a level surface.
Check the coolant level only if the vehicle is
on a level surface and the engine has cooled
down.
X Turn the key to position 2in the ignition lock
(Y page 133).
or
X Press the Start/Stop button twice on vehicles
with KEYLESS-GO or the KEYLESS-GO start
function (Y page 133).
X Check the coolant temperature display on the
instrument cluster (Y page 221).
The coolant temperature must be below
70 †. X
Turn the key to position 0in the ignition lock
(Y page 133).
or X Press the Start/Stop button once on vehicles
with KEYLESS-GO or the KEYLESS-GO start
function (Y page 133).
X Slowly turn cap :half a turn anti-clockwise
and allow excess pressure to escape.
X Turn cap :further anti-clockwise and
remove it.
If the coolant is at the level of marker bar =
in the filler neck when cold, there is enough
coolant in coolant expansion tank ;.
If the coolant level is approximately 1.5 cm
above marker bar =in the filler neck when
warm, there is enough coolant in coolant
expansion tank ;.
X If necessary, top up with coolant that has
been tested and approved by Mercedes-Benz.
X Replace cap :and turn it clockwise as far as
it will go.
Further information on coolant (Y page 366).
Topping up the windscreen washer sys-
tem G
WARNING
If windscreen washer concentrate comes into contact with hot components of the engine or
the exhaust system, it can ignite. There is a
risk of fire and injury.
Make sure the windscreen washer concen-
trate does not come into contact with the filler neck. Topping up the windscreen washer system
(example)312
Engine compartmentMaintenance and care