MERCEDES-BENZ C-CLASS CABRIOLET 2021 Owners Manual

The order of
thech annel lists is alphabetical or
countr y-specific.
The TVtuner requ ires a short amount of time to
update the information.
The channel lists show thefo llowing information:
R recei vable channel names
R programme title
The information is shown under thefo llowing
conditions:
R it is broadcast bythe digital channel
R there ception conditions are adequate Favo
urites Overview of
TVprog rammes (f avourites)
Yo u can sa veup to100 digital TVchannels in
fa vo urites.
Fo rqu ick- access you can sa veTV channels as
fa vo urites. Qui
ck-saving a TVchannel
Multimedia sy stem:
4 Media 5
à Media sources 5
TV #
In full-screen mode, press theto uchpad for
longer than thre e seconds.
The cur rent TV channel is stored in the
fa vo urites in the next available position.
St oring TVchannels
Multimedia sy stem:
4 Media 5
à Media sources 5
TV
5 ß Presets #
Select Store current station in the presets .
or #
Highlight a channel in thech annel list and
st ore as a favo urite.
The cur rent channel is stored in thefa vo ur‐
ites in the next available position.
Moving channels in thefa vo urites #
Highlight a channel in thefa vo urites. #
Select ¥Move highlighted station. #
Highlight the new position. #
Confirm the position.
Deleting channels #
Highlight a channel in thefa vo urites. #
Select ¥Delete highlighted station. #
Select Yes.
Using a voice tag
Multimedia sy stem:
4 Media 5
à Devices 5
TV
5 ß Favourites #
Highlight a TVchannel in thefa vo urites. #
Select ¥Voice tag . #
Alternatively: use a voice tag inthech annel
list.
Creating a voice tag #
Select Add. #
Say a voice tag.
A message appears when thevo ice tag has
been created.
Lis tening toavo ice tag #
Select Listen. 348
Multimedia sy stem

Deleting a
voice tag #
Select Delete.
A message appears asking whe ther youwa nt
to dele tethevo ice tagfo rth eTV channel. #
Select Yes. TV
prog ramme Overvi
ewof audio language and subtitles
Au dio language
R A selection from theav ailable audio lan‐
guages can be made for a programme broad‐
cast in multiple languages.
R If English, forex ample, is set as the sy stem
language and a TVchannel is broadcasting in
th is language, En glish is selec ted automati‐
cally.
The prog ramme transmission may be indica ted
with thefo llowing symbols:
m Programme with audio explanations for
th e visually impaired
o Stereo broadcast n
Programme forth e hearing impaired
O Broadcast in sur round sound
If a symbol is not shown, the programme is
either broadcast in mono or the transmission
properties are unkn own.
Subtitles
R The function is switched on: subtitles are
shown in the selected language forth e cur‐
re nt programme (if available).
Setting theTV audio language
Multimedia sy stem:
4 Media 5
à Media sources 5
TV
5 Z Options #
Select Audio/subtitles. #
Select one of theav ailable audio languages.
% The audio language selec ted only applies to
th e cur rent programme. Setting the
TVsubtitles
Multimedia sy stem:
4 Media 5
à Media sources 5
TV
5 Z Options #
Select Audio/subtitles. #
Select Show subtitles.
Switch the subtitles on Oor off ª. #
Select one of theav ailable languages forthe
subtitles. Te
lete xt Te
lete xt ove rview
Te lete xt pa ges are located between page 100
and page 899.
A dynamic telete xt pa geconsi sts of se veral sub‐
pages.
Information on MHEG-5 digital telete xt:
R Digital telete xt is only available in some
countries, e.g. the UK and New Zealand
R Interactive multimedia applications such as
we ather fore casts, ne wsreports and sport
re sults are available Multimedia sy
stem 349

R
It may take some time before all the pages
load
Showing telete xt
Multimedia sy stem:
4 Media 5
à Media sources 5
TV
5 Z Options 5
Teletext #
Tocall up the pr evious or next telete xt
page: swipe upwards or down wards on the
to uchpad. #
Toenter numbers: press and holdthe
to uchpad. #
Enterth e numbers in quick succession. #
Toselect a subpage: swipe left orright on
th eto uchpad.
% The subpage cur rently selected is ma rked by
a blue symbol. #
Toreturn totheTV prog ramme: press and
hold the% button. MHEG-5 digital
telete xt #
Ifth ete lete xt is displ ayed, press and hold on
th eto uchpad.
A colour selection bar appears. #
Select a colour.
The data content is displ ayed. #
Toenter numbers: select123. #
Enterth e numbers in quick succession. #
Toreturn totheTV prog ramme: selectTV. Pictu
resettings Picture settings
overview
The following picture form at settings are availa‐
ble:
R Automatic
The brightness is automatically set with this
option.
R 16:9
R 4:3
R Zoom Selecting picture settings
Multimedia sy
stem:
4 Media 5
à Media sources 5
TV
5 Z Options #
Select Picture format. #
Select a picture form at.
Ad justing the brightness manually
If th eAutomatic pictureform at is swit ched off,
yo u can adjust the brightness yourself. #
Select Brightness. #
Adjust the brightness. HD prog
rammes Re
ceiving encryp ted HD prog rammes
* NO
TEDama getothe CI+ module and
Smart Card The CI+ module is designed
for use in the
home. The CI+ module can overheat and be
damaged bycontinuous exposure tohigh
outside temp eratures. 350
Multimedia sy stem

#
Make sure that the CI+ module is not
subject tohigh temp eratures forex ten‐
ded pe riods of time.
If th e CI+ module is damaged, no
encryp tedch annels can be recei ved. The
TVtuner is in the boot recess. #
Ifre qu ired (countr y-dependent), insert the
smart card into the CI+ module slot. #
Remo vethe pr otective cap from theTV tune r. #
Insert the CI+ module into theTV tuner sl ot. #
Place the pr otective cap on theTV tune r.
When the CI+ module is inser ted cor rectly,
encryp ted HD programmes can be recei ved
according toCI+ standard.
If th e CI+ module is not compatible, an er ror
messa geappears.
Calling up the CI+ module menu
Multimedia sy stem:
4 Media 5
à Media sources 5
TV
5 Z Options #
Select CA module. #
Select a menu option.
% You can view the subscription number in the
CI+ menu. You need this to extend the sub‐
scription, forex ample.
If playback is malfunctioning, you can try to
re sol vethe problem with Restart CI+ mod-
ule.
Fu rther information can be found in the man‐
ufacturer's operating instructions. Sound
To
ne settings Information about
the sound sy stem
The sound sy stem has a total output of 100 W
and is equipped with five speakers. It is available
fo r all functions in thera dio and media modes.
% The call can also be made from other audio
sources. Replace Media with, forex ample,
Ra dio in the menu path. Calling up
the sound menu
Multimedia sy stem:
4 Media 5
à Sound
The following functions are available:
R Equaliser
R Balance and Fader
R Automatic volume adjustment
R Other sound settings #
Select a sound menu.
Ad justing treble, mid- range and bass set‐
tings
Multimedia sy stem:
4 Media 5
à Sound 5
Equaliser #
Select Treble, MidorBass. #
Change the settings. Multimedia sy
stem 351

Ac
tivating/deactivating automatic volume
adjustment
Multimedia sy stem:
4 Media 5
à Sound
5 Automatic volume adjustment
Au tomatic volume adjustment compensates for
dif fering volumes when changing between audio
sources. #
Activate Oor deacti vate ª the function.
Ad justing the balance/ fader
Multimedia sy stem:
4 Media 5
à Sound
5 Balance and Fader #
Adjust the balance and fader. #
Toexitth e menu: pressthe% button. Burmes
ter®
sur round sound sy stem Information about
the Bu rmester ®
sur round
sound sy stem
The Burmes ter®
sur round sound sy stem has a
to ta l output of 590 W and is equipped with 13speakers. It is
available for all functions in the
ra dio and media modes.
% The call can also be made from other audio
sources. Replace Media with, forex ample,
Ra dio in the menu path.
Calling up the sound menu in the
Bu rm ester ®
sur round sound sy stem
Multimedia sy stem:
4 Media 5
à Sound
The following functions are available:
R Equaliser
R Balance and Fader
R Automatic volume adjustment
R Surround sound
R Sound focus
R Other sound settings #
Select a function. Ad
justing the treble, mid and bass settings
on the Burmes ter®
sur round sound sy stem
Multimedia sy stem:
4 Media 5
à Sound 5
Equaliser #
Select Treble, MidorBass. #
Set the desired values.
Ac tivating or deactivating volume adjust‐
ment in the Bu rmester ®
sur round sound sys‐
tem
Multimedia sy stem:
4 Media 5
à Sound
5 Automatic volume adjustment
Au tomatic volume adjustment compensates for
dif fering volumes when changing between audio
sources. #
Activate Oor deacti vate ª the function. 352
Multimedia sy stem

Ad
justing the balance/ fader in the
Burmes ter®
sur round sound sy stem
Multimedia sy stem:
4 Media 5
à Sound
5 Balance and Fader #
Adjust the balance and fader. #
Toexitth e menu: pressthe% button.
Switching sur round sound on or off in the
Burmes ter®
sur round sound sy stem
Multimedia sy stem:
4 Media 5
à Sound
5 Surround sound #
Activate Oor deacti vate ª the function.
Ad justing the sound focus in the Bu rmester ®
sur round sound sy stem
Multimedia sy stem:
4 Media 5
à Sound 5
Sound focus #
Adjust the sound focus. Ad
vanced sound sy stem Information about
theAd vanced sound sys‐
tem
The Adva nced sound sy stem has a total output
of 225 W and is equipped with nine speakers. It
is available for all functions in thera dio and
media modes.
Calling up the sound menu in theAd vanced
sound sy stem
Multimedia sy stem:
4 Media 5
à Sound
The following functions are available:
R Equaliser
R Balance and Fader
R Automatic volume adjustment #
Select a function.
Ad justing treble, mid- range and bass set‐
tings in theAd vanced sound sy stem
Multimedia sy stem:
4 Media 5
à Sound 5
Equaliser #
Select Treble, MidorBass. #
Set the desired values.
Switching volume adjustment in the
Ad vanced sound sy stem on/off
Multimedia sy stem:
4 Media 5
à Sound
5 Automatic volume adjustment
Au tomatic volume adjustment compensates for
dif fering volumes when changing between audio
sources. #
Activate Oor deacti vate ª the function.
Setting the balance/fader in theAd vanced
sound sy stem
Multimedia sy stem:
4 Media 5
à Sound
5 Balance and Fader #
Adjust the balance and fader. Multimedia sy
stem 353

ASS
YST PLUS se rvice inter val display Fu
nction of the ASS YST PLUS se rvice inter val
displ ay The ASS
YST PLUS service inter val display on the
instrument display pr ovides information on the
re maining time or dis tance be fore the next
service due date.
Yo u can hide this service display using the back
button on the left-hand side of thesteering
wheel.
Depending on how theve hicle is used, the
ASS YST PLUS service inter val display may
shor tenth e service inter val, e.g. in thefo llowing
cases:
R mainly short-dis tance driving
R when the engine is of ten le ftidling for long
periods
R intheeve nt of frequent cold start phases
R vehicles with a diesel particulate filter: in
th eev ent of frequently inter rupted rege nera‐
tion of the diesel particulate filter Mercedes-Benz
recommends avoiding such
operating conditions.
Yo u can obtain information concerning the serv‐
icing of your vehicle from a qualified specialist
wo rkshop, e.g. a Mercedes-Benz Service Centre. Displaying
the service due da te On-board computer:
4 Service 5
ASSYST PLUS
The next service due date is displa yed. #
Toexitth e displa y:press the back button
on the left-hand side of thesteering wheel.
Bear in mind thefo llowing related topic:
R Operating the on-board computer
(/ page 228). Information on
regular maintenance work *
NO
TEPremature wearthro ugh failure to
obser veservice due dates Maintenance
workwhich is not car ried out at
th eright time or incomple tely can le adto
inc reased wear and damage totheve hicle. #
Adhere tothe prescribed service inter‐
va ls. #
Alw ays ha vethe prescribed mainte‐
nance workcar ried out at a qualified
specialist workshop. Special service
requ irements The prescribed service inter
val is based on nor‐
mal operation of theve hicle. Maintenance work
will need tobe per form ed more of ten if theve hi‐
cle is operated under arduous conditions or
increased loads.
The ASS YST PLUS service inter val display is only
an aid. The driver of theve hicle bears responsi‐
bility as rega rdsto whe ther maintenance work
needs tobe per form ed more of tenth an speci‐ 354
Maintenance and care

fi
ed based on the actual operating conditions
and/or loads.
Examples of arduous operating conditions:
R regular city driving with frequent intermedi‐
ate stops
R mainly short-dis tance driving
R frequent operation in mountainous terrain or
on poor road sur faces
R when the engine is of ten le ftidling for long
periods
R operation in particula rly dusty conditions
and/or if air-recirculation mode is frequently
used
In these or similar operating conditions, ha vethe
interior air filter, engine air cleaner, engine oil
and oil filter etc. changed more frequent ly. The
ty re s must be checked more frequently if the
ve hicle is operated under increased loads. Fur‐
th er information can be obtained at a qualified
specialist workshop. Battery disconnection periods
The ASS
YST PLUS service inter val display can
calculate the service due date only when the
battery is connec ted. #
Notedown the service due date displa yed on
th e instrument display before disconnecting
th e battery (/ page 354). Engine compartment
Ac
tive bonn et(pedestrian pr otection) Operation of
the active bonnet (pedestrian
pr otection)
In cer tain accident situations, the actuation of
th e active bonn etreduces therisk of injury to
pedestrians. The rear area of the bonn etis
ra ised byappr oximately 85 mm.
Fo rth e drive tothewo rkshop, reset the actuated
active bonn etyourself (/ page 355).
Af terth e active bonn ethas been actuated,
pedestrian pr otection may be limited.
Ha ve the full functionality of the active bonn et
re stored in a qualified specialist workshop. Re
setting the active bonnet &
WARNING Risk of bu rns from hot com‐
ponent parts in the engine compartment
Cer tain component parts in the engine com‐
partment can be very hot, e.g. the engine,
th e cooler and parts of theex haust sy stem. #
Allow the engine tocool down and only
to uch co mponent parts described in
th efo llowing. Maintenance and care
355

#
With your hand flat, push down active bonnet
1 inthe area around the hinges on bo th
sides (ar rows).
In doing so, the actuator is depressurised
and you may hear a hissing sound.
The engine bonnet must en gage in position. #
Ifth e active bonn etcan be raised slight lyat
th ere ar in the area of the hinges, repeat the
st ep until it engages cor rectl y. Opening and closing
the bonnet &
WARNING Risk of accident due todriv‐
ing with the bonn etunlo cked
The bonn etmay open and block your vie w. #
Neverre lease the bonn etwhen driving. #
Before every trip, ensure that the
engine bonn etis loc ked. &
WARNING Risk of accident and inju ry
when opening and closing the bonn et
The bonnet may suddenly drop into the end
position.
There is a risk of injury for an yone in the
engine bonn et's range of mo vement. #
Do not open or close the bonn etifth ere
is a person in the bonn et's range of
mo vement. &
WARNING Risk of bu rns when opening
th e bonn et
If yo u open the bonn etwhen the engine has
ove rheated or when there is a fire inthe
engine compartment, thefo llowing situations
may occur:
R You could come into contact with hot
ga ses.
R You could come into contact with other
hot, escaping operating fluids. #
Before opening the bonn et, allow the
engine tocool down. #
Intheeve nt of a fire inthe engine com‐
partment, keep the bonn etclosed and
call thefire service. &
WARNING Risk of inju rydue tomoving
parts
Components in the engine compartment may
continue running or start up sudden ly,even if
th e ignition is switched off.
Make sure of thefo llowing before per form ing
ta sks in the engine compartmen t: #
Switch the ignition off. #
Neverre ach into the danger zone sur‐
ro unding moving co mponents, e.g. the
ro tation area of thefa n. #
Remo vejewe llery and watches. #
Keep items of clo thing and hair away
from moving parts. 356
Maintenance and care

&
WARNING Risk of inju ryfrom touching
co mp onents under voltage
The ignition sy stem and the fuel injection
sy stem workunder high voltage. You could
re cei vean electric shoc k. #
Neverto uch co mponents of the ignition
sy stem or the fuel injection sy stem
when the ignition is switched on. The live components include
thefo llowing, for
ex ample:
R Ignition coils
R Spark plug connec tors
R Injectors &
WARNING Risk of bu rns from hot com‐
ponent parts in the engine compartment
Cer tain component parts in the engine com‐
partment can be very hot, e.g. the engine,
th e cooler and parts of theex haust sy stem. #
Allow the engine tocool down and only
to uch co mponent parts described in
th efo llowing. &
WARNING Risk of inju ryfrom using the
windscreen wipers while the engine bon‐
net is open
When the engine bonn etis open, and the
windscreen wipers are set in motion, you can
be trapped bythe wiper linkage. #
Alw ays switch off the windscreen wip‐
ers and ignition before opening the
engine bonn et. Opening
the bonnet #
Torelease the bonn et, pull on handle 1. Maintenance and care
357