2018 MERCEDES-BENZ C-CLASS CABRIOLET steering

Vehicle
Warning/
indicator
lampNSignal type
Possible causes/consequences and M
Solutions
ÐNThe red power steering warning lamp is lit while the engine is running.
The power steering is malfunctioning.
A warning tone also sounds.
GWARNING
You will need to use more force to steer.
There is a risk of an accident.
XCheck whether you are able to apply the extra force required.
If you are able to steer safely:
XDrive on carefully.
XVisit a qualified specialist workshop immediately.
If you are unable to steer safely:
XDo not drive on.
XConsult a qualified specialist workshop.
252Warning and indicator lamps in the instrument cluster
On-board computer and displays

Operating system
Overview
General notes
Wearing polarized sunglasses may impair your
ability to read the display.
The display has an automatic temperature-con-
trolled switch-off feature. The brightness is
automatically reduced if the temperature is too
high. The display may temporarily switch off
completely.
Cleaning instructions
!Do not touch the display. The display has a
very sensitive high-gloss surface; there is a
risk of scratching. If you have to clean the
screen, however, use a mild cleaning agent
and a soft, lint-free cloth.
The display must be switched off and have
cooled down before you start cleaning. Do not
apply pressure to the display surface when
cleaning it, as this could cause irreversible dam-
age to the display.
Switching the multimedia system
on/off
XPress the Übutton on the center console
to the right of the controller.
XFor Mercedes-AMG vehicles with a switch- able AMG Performance exhaust system:
press the thumbwheel which is to the right of
the controller.
Adjusts the volume
XTurn the thumbwheel to the right of the con-
troller.
The volume is adjusted:
Rfor the currently selected media source
Rduring traffic or navigation announcements
Rin hands-free mode during a phone call
Switching the sound on or off
This function is only available on the multifunc-
tion steering wheel for Mercedes-AMG vehicles
with a selectable AMG Performance exhaust
system.
XPress the thumbwheel to the right of the con-
troller.
or
XPress the 8button on the multifunction
steering wheel.
If the audio output is switched off, the status
line will show the 8symbol. If you switch
the media source or change the volume, the
sound is automatically switched on.
iNavigation announcements will be heard
even if the sound is muted.
Functions
The multimedia system has the following func-
tions:
RRadio mode
RMedia mode with media search
RSound system
RNavigation system
COMAND: navigation via the hard drive
Audio 20: navigation via SD card
RCommunication functions
RSIRIUS Weather (COMAND)
RVehicle functions with system settings
RFavorites functions
Controller
The controller in the center console lets you:
Rselect menu items on the display
Renter characters
Rselect a destination on the map
Rsave entries
The controller can be:
Rturned 3
Rslid left or right 1
Rslid forwards or back 4
Rslid diagonally2
Rpressed briefly or pressed and held 7
Back button
You can use the%button to exit a menu or to
call up the display of the current operating
mode.
254Operating system
Multimedia system

XPull cover;out by its top edge.
XLift up the cover of socket :.
mbrace
General notes
The mbrace system is only available in the USA.
You must have a license agreement to activate
the mbrace service. Make sure that your system
is activated and operational. To register, press
the ï Info call button. If any of the steps
mentioned are not carried out, the system may
not be activated.
If you have questions about the activation, con-
tact one of the following telephone hotlines:
Mercedes-Benz Customer Assistance Center at 1-800-FOR-MERCedes (1-800-367-6372) or
1-866-990-9007
Shortly after successfully registering with the
mbrace service, a user ID and password will be
sent to you by mail. You can use this password
to log onto the mbrace area under "Owners
Online" at http://www.mbusa.com.
The system is available if:
Rit has been activated and is operational
Rthe corresponding mobile phone network is
available for transmitting data to the Cus-
tomer Center
Ra service subscription is available
Determining the location of the vehicle on a map
is only possible if:
RGPS reception is available
Rthe vehicle position can be forwarded to the
Customer Assistance Center
The mbrace system
To adjust the volume during a call, proceed as
follows:
XPress the WorX button on the multi-
function steering wheel.
or
XUse the multimedia system volume control.
The system offers various services, e.g.:
RAutomatic and manual emergency call
RRoadside Assistance call
RInfo call You can find information and a description of all
available features under "Owners Online" at
http://www.mbusa.com.
System self-test
After you have switched on the ignition, the sys-
tem carries out a self-diagnosis.
A malfunction in the system has been detected
if one of the following occurs:
RThe indicator lamp in the SOS button does notcome on during the system self-test.
RThe indicator lamp in the FRoadside
Assistance button does not light up during
self-diagnosis of the system.
RThe indicator lamp in the ïInfo call button
does not light up during the system self-diag-
nosis
RThe indicator lamp in one or more of the fol-
lowing buttons continues to light up red after the system self-diagnosis:
-SOS button
-F Roadside Assistance call button
-Info call button ï
RAfter the system self-diagnosis, the Inoper‐ativeorServiceNotActivatedmessage
appears in the multifunction display.
If a malfunction is indicated as outlined above,
the system may not operate as expected. In the
event of an emergency, help will have to be
summoned by other means.
Have the system checked at the nearest
Mercedes-Benz Service Center or contact the
following service hotlines:
Mercedes-Benz Customer Assistance Center at
1-800-FOR-MERCedes (1-800-367-6372) or
1-866-990-9007
Features271
Stowage and features
Z

Roadside Assistance
XTo call:press Roadside Assistance but-
ton :.
This initiates a call to the Mercedes-Benz Cus-
tomer Assistance Center.
The indicator lamp in Roadside Assistance
button :flashes while the call is active. The
Connecting Call
message appears in the
multifunction display. The audio output is
muted.
If a connection can be made, the Call
Connec‐tedmessage appears in the multifunction dis-
play.
If a mobile phone network and GPS reception
are available, the system transfers data to the
Mercedes-Benz Customer Assistance Center,
for example:
RCurrent location of the vehicle
RVehicle identification number
The multimedia system display indicates that a
call is active. During the call, you can change to
the navigation menu by pressing the NAVI but-
ton on the multimedia system, for example.
Voice output is not available in this case.
A voice connection is established between the
Mercedes-Benz Customer Assistance Center
and the vehicle occupants.
From the remote malfunction diagnosis, the
Mercedes-Benz Customer Assistance Center
can ascertain the nature of the problem
(
Ypage 276).
The Mercedes-Benz Customer Assistance Cen-
ter either sends a qualified Mercedes-Benz tech-
nician or makes arrangements for your vehicle
to be transported to the nearest Mercedes-Benz
Service Center.
You may be charged for services such as repair
work and/or towing. You can find more information in the separate
mbrace manual.
The system has not been able to initiate a Road-
side Assistance call, if:
Rthe F indicator lamp for the Roadside
Assistance call button is flashing continu-
ously.
Rno voice connection to the Mercedes-Benz
Customer Assistance Ce nter was estab-
lished.
This can occur if the relevant mobile phone net-
work is not available, for example.
The Call Failed
message appears in the mul-
tifunction display.
XTo end a call: press the~button on the
multifunction steering wheel.
or
XPress the corresponding multimedia system
button for ending a phone call.
Info call button
XTo call: press Info call button :.
This initiates a call to the Mercedes-Benz Cus-
tomer Assistance Center.
The indicator lamp in Info call button :
flashes while the connection is being made.
The Connecting Call
message appears in
the multifunction display. The audio output is muted.
If a connection can be made, the Call Con‐
nectedmessage appears in the multifunction
display.
If a mobile phone network and GPS reception
are available, the system transfers data to the
Mercedes-Benz Customer Assistance Center,
for example:
RCurrent location of the vehicle
RVehicle identification number
Features273
Stowage and features
Z

The multimedia system display indicates that a
call is active. During the call, you can change to
the navigation menu by pressing the NAVI but-
ton on COMAND, for example.
Voice output is not available in this case.
A voice connection is established between the
Mercedes-Benz Customer Assistance Center
and the vehicle occupants.
You receive information about operating your
vehicle, about the nearest Mercedes-Benz Ser-
vice Center and about other products and serv-
ices from Mercedes-Benz.
You can find further information on the mbrace
system under "Owners Online" at http://
www.mbusa.com.
The system has not been able to initiate an MB
Info call, if:
Rthe indicator lamp in theïInfo call button
is flashing continuously.
Rno voice connection to the Mercedes-Benz
Customer Assistance Center was estab-
lished.
This can occur if the relevant mobile phone net-
work is not available, for example.
The Call Failed
message appears in the mul-
tifunction display.
XTo end a call: press the~button on the
multifunction steering wheel.
or
XPress the corresponding multimedia system
button for ending a phone call.
Call priority
When service calls are active, e.g. Roadside
Assistance or Info calls, an emergency call can
still be initiated. In this case, an emergency call
will take priority and override all other active
calls.
The indicator lamp of the respective button
flashes until the call is ended.
An emergency call can only be terminated by the
Mercedes-Benz Customer Assistance Center.
All other calls can be ended by pressing:
Rthe ~ button on the multifunction steering
wheel
Rthe corresponding button in the multimedia
system to end the voice call
When a call is initiated, the audio system is
muted. The mobile phone is no longer connected to the
multimedia system.
However, if you want to use your mobile phone,
do so only when the vehicle is stationary and in
a safe location.
Downloading destinations
Downloading destinations
Downloading destinations gives you access to a
database with over 15 million points of interest
(POIs). These can be downloaded on the navi-
gation system in your vehicle. If you know the
destination, the address can be downloaded.
Alternatively, you can obtain the location of
Points of Interest (POIs)/important destinations
in the vicinity.
Furthermore, you can download routes with up
to four way points.
You are prompted to confirm route guidance to
the address entered.
XSelect Yesby turning 3or sliding 1
the controller and confirm with 7.
The system calculates the route and subse-
quently starts the route guidance with the
address entered.
If you select No
the address can be stored in
the address book.
The destination download function is available
if:
Rthe vehicle is equipped with a navigation sys-
tem.
Rthe relevant mobile phone network is availa-
ble and data transfer is possible.
Route Assistance
This service is part of the mbrace PLUS Package
and cannot be purchased separately.
You can use the Route Assistance function even
if the vehicle is not equipped with a navigation
system.
Within the framework of this service, you receive
a professional and reliable form of navigation
support without having to leave your vehicle.
The customer service representative finds a
suitable route depending on your vehicle's cur-
rent position and the desired destination. You
will then be guided live through the current route
section.
274Features
Stowage and features

XIf necessary, add coolant that has been tested
and approved by Mercedes-Benz.
XReplace cap:and turn it clockwise as far as
it will go.
For further information on coolant, see
(
Ypage 343).
Adding washer fluid to the windshield
washer system
GWARNING
Windshield washer concentrate could ignite if it comes into contact with hot engine compo-
nents or the exhaust system. There is a risk of
fire and injury.
Make sure that no windshield washer con-
centrate is spilled next to the filler neck.
Example: adding liquid to the windshield
washer system
XTo open: pull cap:upwards by the tab and
open.
XAdd the premixed washer fluid.
XTo close: press cap :onto the filler neck
until it engages.
If the washer fluid level drops below the recom-
mended minimum fluid level of 1.1 US qt (1.0 l),
a message appears in the multifunction display
prompting you to add washer fluid (
Ypage 239).
Further information on washer fluid
(
Ypage 344).
ASSYST PLUS
Service message
The ASSYST PLUS service interval display
informs you of the next service due date. Information on the type of service and service
intervals (see the separate Maintenance Book-
let).
Further information can be obtained at a quali-
fied specialist workshop, e.g. an authorized
Mercedes-Benz Center, or at
http://www.mbusa.com (USA only).
iThe ASSYST PLUS service interval display
does not show any information on the engine
oil level. Observe the notes on the engine oil
level (
Ypage 282).
The multifunction display shows a service mes-
sage for several seconds, e.g.:
RService A in XX Days
RService A Due
RService A Overdue by XX Days
Depending on the operating conditions of the
vehicle, the remaining time or distance until the
next service due date is displayed.
The letter A
orB, possibly in connection with a
number or another letter, indicates the type of
service. A
stands for a minor service and Bfor a
major service.
You can obtain further information from an
authorized Mercedes-Benz Center.
The ASSYST PLUS service interval display does
not take into account any periods of time during
which the battery is disconnected.
Maintaining the time-dependent service sched-
ule:
XNote down the service due date displayed in
the multifunction display before disconnect-
ing the battery.
or
XAfter reconnecting the battery, subtract the
battery disconnection periods from the ser-
vice date shown on the display.
Hiding a service message
XPress the aor% button on the steering
wheel.
Displaying service messages
XSwitch on the ignition.
XUse ò on the steering wheel to call up the
list of menus.
ASSYST PLUS285
Maintenance and care
Z

XPress9or: on the steering wheel to
select the Servicemenu and confirm with
a.
XPress 9or: on the steering wheel to
select the ASSYST PLUSsubmenu and con-
firm with a.
The service due date appears in the multi-
function display.
Information about Service
Resetting the ASSYST PLUS service
interval display
!If the ASSYST PLUS service interval display
has been inadvertently reset, this setting can
be corrected at a qualified specialist work-
shop.
Have service work carried out as described in
the Maintenance Booklet. This may otherwise
lead to increased wear and damage to the
major assemblies or the vehicle.
A qualified specialist workshop, e.g. an author-
ized Mercedes-Benz Center, will reset the
ASSYST PLUS service interval display after the
service work has been carried out. You can also
obtain further information on maintenance
work, for example.
Special service requirements
The specified maintenance interval takes only
the normal operation of the vehicle into
account. Under arduous operating conditions or
increased load on the vehicle, maintenance
work must be carried out more frequently, for
example:
Rregular city driving with frequent intermediate
stops
Rif the vehicle is primarily used to travel short
distances
Ruse in mountainous terrain or on poor road
surfaces
Rif the engine is often left idling for long periods
Under these or similar conditions, have, for
example, the air filter, engine oil and oil filter
replaced or changed more frequently. Under
arduous operating conditions, the tires must be
checked more often. Further information can be obtained at a qualified specialist workshop, e.g.
an authorized Mercedes-Benz Center.
Driving abroad
An extensive Mercedes-Benz Service network is
also available in other countries. You can obtain
further information from any authorized
Mercedes-Benz Center.
Care
General notes
!
For cleaning your vehicle, do not use any of
the following:
Rdry, rough or hard cloths
Rabrasive cleaning agents
Rsolvents
Rcleaning agents containing solvents
Do not scrub.
Do not touch the surfaces or protective films
with hard objects, e.g. a ring or ice scraper.
You could otherwise scratch or damage the
surfaces and protective film.
!Do not park your vehicle for a long period of
time directly after cleaning, particularly after
cleaning the wheel rim with wheel cleaner.
Wheel cleaner can lead to the increased cor-
rosion of the brake discs and pads. Therefore,
drive for a few minutes after cleaning. By
heating up the brakes, the brake discs and
pads dry. The vehicle can then be parked for a
long period of time.
HEnvironmental note
Dispose of empty packaging and cleaning
cloths in an environmentally responsible man-
ner.
Regular care of your vehicle is a condition for
retaining the quality in the long term.
Use care products and cleaning agents recom-
mended and approved by Mercedes-Benz.
Washing the vehicle and cleaning the
paintwork
Automatic car wash
GWARNING
Braking efficiency is reduced after washing
the vehicle. There is a risk of an accident.
286Care
Maintenance and care

For heavier soiling, you can apply a fine paint-
work polish with a microfiber cloth. Remove
the excess polish residue after polishing.
Impurities combined with the effects of road grit
and corrosive environmental factors may cause
flash rust to form on the surface. You can
restore the original shine of the exhaust pipe by
cleaning it regularly, especially in winter and
after washing.
XClean the exhaust pipe with a care product
tested and approved by Mercedes-Benz.
Interior care
Cleaning the display
!For cleaning, do not use any of the following:
Ralcohol-based thinner or gasoline
Rabrasive cleaning agents
Rcommercially-available household cleaning
agents
These may damage the display surface. Do
not put pressure on the display surface when cleaning. This could lead to irreparable dam-
age to the display.
XBefore cleaning the display, make sure that it
is switched off and has cooled down.
XClean the display surface using a commer-
cially available microfiber cloth and TFT/LCD
display cleaner.
XDry the display surface using a dry microfiber
cloth.
Cleaning the plastic trim
GWARNING
Care products and cleaning agents containing solvents cause surfaces in the cockpit to
become porous. As a result, plastic parts may
come loose in the event of air bag deploy-
ment. There is a risk of injury.
Do not use any care products and cleaning
agents to clean the cockpit.
!Never attach the following to plastic surfa-
ces:
Rstickers
Rfilms
Rperfume oil container or similar
You could otherwise damage the plastic.
!Do not allow cosmetics, insect repellent or
sunscreen to come into contact with the plas-
tic trim. This maintains the high-quality look of
the surfaces.
XWipe the plastic trim with a damp, lint-free
cloth, e.g. a microfiber cloth.
XHeavy soiling: use care and cleaning prod-
ucts recommended and approved by
Mercedes-Benz.
The surface may change color temporarily.
Wait until the surface is dry again.
Cleaning the steering wheel and selec-
tor lever
XThoroughly wipe with a damp cloth or use
leather care agents that have been recom-
mended and approved by Mercedes-Benz.
Cleaning genuine wood and trim ele-
ments
!Do not use solvent-based cleaning agents
such as tar remover, wheel cleaners, polishes
or waxes. There is otherwise a risk of damag-
ing the surface.
!Do not use chrome polish on trim pieces.
The trim pieces have a chrome look but are
mostly made of anodized aluminum and can
lose their shine if chrome polish is used. Use
a damp, lint-free cloth instead when cleaning
the trim pieces.
If the chrome-plated trim pieces are very
dirty, you can use a chrome polish. If you are unsure as to whether the trim pieces are
chrome-plated or not, consult an authorized
Mercedes-Benz Center.
Care293
Maintenance and care
Z