change time MERCEDES-BENZ C-CLASS CABRIOLET 2021 Owners Manual

Thank
youfo r pur chasing a Mercedes-Benz
Before youfirs t drive off, read this Owner's Man‐
ual carefully and familiarise yourself with your
ve hicle. Foryo ur ow n sa fety and a longer operat‐
ing li fespan of theve hicle, follow the instructions
and warning notices in this Owner's Manual. Dis‐
re ga rding them may lead todamage totheve hi‐
cle or injury topeople.
The standard equipment and product desc ript ion
of your vehicle may vary and depends on thefo l‐
lowing factors:
R Model
R order
R national version
R availability
The illustrations in this Owner's Manual show a
left-hand drive vehicle. On right-hand-drive vehi‐
cles, the la yout of car parts and cont rol ele‐
ments dif fers accordin gly.
Mercedes-Benz is cons tantly de veloping its vehi‐
cles fur ther. Mercedes-Benz
therefore reser vesth eright to
int roduce changes in thefo llowing areas:
R design
R equipment
R tech nical features
The equipment in your vehicle may therefore dif‐
fe r from that shown in the descriptions and illus‐
trations.
The following documents are integral parts of
th eve hicle:
R Digital Owner's Manual
R printed Owner's Manual
R service booklet
R equipment-dependent Supplements
Ke ep these documents in theve hicle at all
times. If you sell theve hicle, alw ays pass all of
th e documents on tothe new owner.
2055840929Z102
2055840929Z102

Climate control
........................................ 13 3
Overview of climate contro l systems ..........1 33
Operating the climate control sy stem ......... 13 3 Driving and pa
rking .................................. 137
Driving ........................................................ 137
DY NA MIC SELECT switch ............................1 48
Au tomatic transmission .............................. 15 0
Fu nction of the 4MATIC .............................. 15 5
Re fuelling .................................................... 15 5
Pa rking ........................................................ 161
Driving and driving sa fety sy stems .............1 68
Tr ailer hit ch................................................. 219
Bicycle rack function .................................. 224
Ve hicle towing instructions ........................ .225 Instrument display and on-board
comp
uter.................................................. 226
No tes on the instrument display and on-
board computer .......................................... 226
Instrument display overview ...................... .227
Overview of buttons on thesteering
wheel ..........................................................2 28
Operating the on-board computer .............. 228 Overview of displa
yson the multifunc‐
tion display .................................................2 29
Head-up display .......................................... 230 LING
UATRONIC ........................................ 232
No tes on operating saf ety .......................... 232
Ope ration ................................................... 232
Using LINGU ATRO NIC ef fectively ............... 234
Essential voice commands ........................ .235 Multimedia sy
stem .................................. 247
Overview and operation .............................. 247
Sy stem settings .......................................... 256
Fit & Healt hy............................................... 268
Na vigation .................................................. 269
Te lephone .................................................. .295
Online and Internet functions ..................... 322
Media ........................................................ .327
Ra dio .......................................................... 340
TV ............................................................... 343
Sound ......................................................... 351 Main
tenance and care ............................. 354
ASS YST PLUS service inter val display ........ 354
Engine compartment .................................. 355
Cleaning and care ...................................... .362 Breakdown assi
stance ............................ 372
Emergency ................................................. .372
Flat tyre ...................................................... 374
Battery (vehicle) .......................................... 381
To w- starting or towing away ....................... 386
Electrical fuses ........................................... 391 Wheels and tyres
..................................... 395
No tes on noise or unusual handling char‐
acteristics .................................................. .395
No tes on regular lyinspecting wheels and
tyres .......................................................... .395
No tes on snow chains ................................ 395
Ty re pressure .............................................. 396
Wheel change ............................................ .400
Emergency spa rewheel .............................. 41 0 Con
tents 3

Pr
otection of the environment
+ ENVIRONMENTAL
NOTEEnvironmental
dama gedue tooperating conditions and
personal driving style The pollutant emission of
theve hicle is
directly related tothewa yyo u operate the
ve hicle.
Operate your vehicle in an environmentally
re sponsible manner tohelp pr otect the envi‐
ro nment. Please obser vethefo llowing rec‐
ommendations on ope rating conditions and
pe rsonal driving style.
Operating conditions: #
Make sure that the tyre pressure is cor‐
re ct. #
Do not car ryany unnecessary weight
(e.g. roof luggage rack s once you no
lon ger need them). #
Adhere tothe service inter vals.
A regularly serviced vehicle will contri b‐
ute toenvironmen tal pr otection. #
Alw ays ha vemaintenance workcar ried
out at a qualified specialist workshop.
Pe rsonal driving style: #
Do not depress the accelera tor pedal
when starting the engine. #
Do not warm upthe engine while the
ve hicle is stationar y. #
Drive carefully and maintain a suitable
di st ance from theve hicle in front. #
Avoid frequent, sudden acceleration
and braking. #
Change gear in good time and use each
ge ar on lyup toÔ of its maximum
engine speed. #
Switch off the engine in stationary traf‐
fi c, e.g. byusing the ECO start/ stop
function. #
Drive fuel-ef ficiently. Obser vethe ECO
display for a fuel-ef ficient driving style. Ta
ke -back of end-of-life vehicles
EU countries onl y:
Mercedes-Benz will take back your end-of-life
ve hicle for environment-friendly disposal in
accordance with the European Union(EU) End-
of-Life Vehicles Directive.
A network of vehicle take -ba ckpoints and dis‐
mantlers has been es tablished foryo uto return
yo ur vehicle. You can lea veit at any of these
points free of charge . This makes an impor tant
contribution toclosing there cycling circle and
conse rving resources.
Fo r fur ther information about there cycling and
disposal of end-of-li fevehicles, and theta ke-
back conditions, please visit the national
Mercedes-Benz website foryo ur count ry. Gene
ral no tes 21

tion, number of wheel
revo lutions or thefa s‐
te ned seat belts displ ay
R ambient conditions, such as temp erature,
ra in sensor or dis tance sensor
General ly,th e use of these data is temp orar y;
th ey will not be stored be yond the period of
operation and will only be processed within the
ve hicle itself. Control units of ten contain da ta
memories forve hicle keys,fo rex ample. Their
use permits thete mp orary or permanent docu‐
mentation of tech nical information about the
ve hicle's operating state, component loads,
main tenance requ irements and tech nical events
or faults.
Depending on theve hicle equipment, thefo llow‐
ing data are stored:
R operating status of sy stem components,
such as fill le vels, tyre pressure or battery
st atus
R malfunctions or faults in impor tant sy stem
components, such as lights or brakes
R system reactions in special driving situations,
such as airbag deployment or the inter ven‐
tion of stability control sy stems R
information on events leading tovehicle
damage
In cer tain cases, it may be requiredtostore data
th at wo uld ha veotherwise been used only tem‐
poraril y.This may be the case if theve hicle has
de tected a malfunction, forex ample.
If yo u use services, such as repair services and
maintenance work,st ored operational data as
we ll as theve hicle identification number can be
re ad out and used. They can be read out by
service network emplo yees, such as workshops
and manufacturers or third parties, such as
breakdown services. The same is true in the
case of warranty claims and quality assurance
measures.
In general, there adout is per form ed via the
legally prescribed port forth e diagnostics con‐
nection in theve hicle. The operational data that
are read out document tech nical states of the
ve hicle or of individual components and assist in
th e diagnosis of malfunctions, compliance with
wa rranty obligations and quality impr ovement.
To that end, these data, in particular information
about component loads, tech nical events, mal‐ functions and
other faults may be transmitted
along with theve hicle identification number to
th e manufacturer. Furthermore, the manufac‐
turer is subject toproduct liability. Forth is rea‐
son the manufacturer also uses operational data
from theve hicle, forex ample, forre calls. These
da ta can also be used toexamine the cus tom‐
er's warranty and guarantee claims.
Fa ult memories in theve hicle can be reset by a
service outlet or at your requ est as part of repair
or maintenance work.
Con venience and inf otainment functions
Yo u can store con venience settings and individ‐
ual settings in theve hicle and change or reset
th em at any time.
Depending on theve hicle equipment, this
includes thefo llowing settings, forex ample:
R seat and steering wheel positions
R suspension and climate control settings
R individual settings, such as interior lighting
Depending on the selected equipment, you can
import data into vehicle inf otainment functions
yo urself. 34
General no tes

Depending on
theve hicle equipment, this
includes thefo llowing data, forex ample:
R multimedia data, such as music, films or pho‐
to sfo r playback in an integrated multimedia
sy stem
R address book data for use in connection with
an integrated hands-free sy stem or an inte‐
grated navigation sy stem
R entered navigation destinations
R data about the use of Internet services
These data for con venience and inf otainment
functions may be sa ved locally in theve hicle or
th ey may be located on a device which you ha ve
connected totheve hicle, such as a smartphone,
USB flash drive or MP3 pla yer.If yo u ha ve
entered these data yourself, you can dele tethem
at any time.
This data is transmit ted from theve hicle tothird
parties only at your requ est. This applies, in par‐
ticular, when you use online services in accord‐
ance with the settings that you ha veselected. Smartphone integ
ration (e.g. Android Autoor
Apple CarPlay ®
)
If yo ur vehicle is accordingly equipped, you can
connect your smartphone or ano ther mobile end
device totheve hicle. You can then control them
by means of the control elements integrated in
th eve hicle. Images and audio from the smart‐
phone can be output via the multimedia sy stem.
Cer tain information is simultaneously transfer‐
re dto yo ur smartphone. Depending on the type
and integration, this includes position data, day/
night mode and other general vehicle statuses.
Fo r more information please consult the Owner's
Manual of theve hicle/inf otainment sy stem.
This integration allo ws the use of selected
smartphone apps, such as navigation or music
pla yer apps. There is no fur ther interaction
between the smartphone and theve hicle; in par‐
ticular, vehicle data is not directly accessible.
The type of additional data processing is de ter‐
mined bythe pr ovider of the app being used.
Which settings you can make, if an y,depends on
th e specific app and the operating sy stem of
yo ur smartphone. Online services
Wire
less network connection
If yo ur vehicle has a wireless network connec‐
tion, it enables data tobe exc hanged between
yo ur vehicle and additional sy stems. The wire‐
less network connection is made possible bythe
ve hicle's own transmitter and recei ver or by a
mobile end device that you ha vebrought into the
ve hicle, forex ample, a smartphone. Online func‐
tions can be used via the wireless network con‐
nection. This includes online services and appli‐
cations/apps pr ovided to yo uby the manufac‐
turer or by other pr oviders.
Manu factu rer's se rvices
Re garding the manufacturer's online services,
th e individual functions are described bythe
manufacturer in a suita ble place,forex ample, in
th e Owner's Manual or on the manufacturer's
we bsite, where there leva nt da taprotection
information is also given. Personal data may be
used forth e pr ovision of online services. Data
are exchanged via a secure connection, such as
th e manufacturer's designated IT sy stems. Any
personal data which are collected, processed General no
tes35

Switching
the A/C function on/off using the
air conditioning control panel The A/C function heats, cools and dehumidi
fies
th eve hicle's interior air. #
Press the¿ button.
Switch off the A/C function only brief ly;ot her‐
wise, the windo wsmay mist up more quickl y.
Condensation may drip from the underside of
th eve hicle when cooling mode is active. This is
not indicative of a fault. Setting climate cont
rolto automatic mode In auto
matic mode, the set temp erature is con‐
trolled and maintained at a const ant levelby the
air suppl y. #
Press the à button. #
Toswitch tomanual mode: pressthe H
or _ button. Ac
tivating/deactivating the climate control
syn chro nisation function via the air condi‐
tioning control panel Climate control can be set centrally using
the
synchronisation function. The temp erature and
air distribution settings forth e driver's side will
be adop ted automatically forth e front passenger
side. #
Press the0 button.
The synchronisation function will be deactivated
if th e settings for one of theot her climate con‐
trol zones are changed. Demisting
the windo ws Wi
ndo wsmis ted up on the inside #
Press theà button. #
Ifth e windo wscontinue tomist up: press the
¬ button.
Wi ndo wsmis ted up on the outside #
Switch on the windscreen wipers. #
Press theà button. Switching air-recirculation mode on/off
#
Press theg button.
The interior air will be recirculated.
Air-reci rculation mode automatically swit ches to
fresh air mode af ter some time.
% If air-recirculation mode is switched on, the
windo wsmay mist up more quickl y.Switch
on ai r-re circulation mode only brie fly. Ac
tivating/deactivating ionisation Multimedia sy
stem:
4 Vehicle 5
b Climate control
5 Ionisation
Ionisation cleans and refreshes the interior air of
th eve hicle. Ionisation of the interior air is odour‐
less. #
Activate Oor deacti vate ª the function. 134
Climate cont rol

#
Shift the transmission toposition hork.
If h is selected, the transmission only shifts
to one gear; if kis selec ted, the transmis‐
sion shifts toreve rsege ar. #
Have the transmission checked at a qualified
specialist workshop immediately. Manual
gearshifting When
the automatic transmission is shif tedto
position h,you can manually shift it with the
st eering wheel gearshift paddle. If permit ted, the
automatic transmission shifts toa higher or
lo we rge ar depending on thesteering wheel
ge arshift paddle being pulled. Yo
u ha vetwo options tomanually shift the auto‐
matic transmission:
R Temp orary setting
R Perm anent setting
The gears shift automatically when manual shift‐
ing is deactivated.
Te mp orary setting: #
Toactivate: Pullsteering wheel gearshift
paddle 1or2.
Manual shifting is activated for a short time.
The transmission position display sho wsp
and the cur rent gear.
% How long the manual shifting stay s activated
is dependant on various factors.
Manual shi fting can be automatically deacti‐
va ted in thefo llowing cases:
R Changing the drive prog ram
R Restarting theve hicle
R When the transmission position his
engaged again
R Driving style #
Toshift up: Pullsteering wheel gearshift
paddle 2. #
Toshift down: Pullsteering wheel gearshift
paddle 1. #
Todeactivate: Pullsteering wheel gearshift
paddle 2and hold it in place.
The transmission position display sho wsh.
Pe rm anent setting: #
Change todrive prog ram =(/ page149). #
Select drive setting p(/ page 150). Gearshif
tre commendation The
gearshift recommendation assists you in
adopting an economical driving style. Driving and parking
15 3

%
Glide mode can be ended bypressing a
st eering wheel gearshift paddle
(/ page 153). Fu
nction of the 4MATIC
4MATIC ensures that all four wheels are driven.
To get her with ESP ®
and 4ETS, 4MATIC impr oves
th e traction of your vehicle whene ver a driven
wheel spins due toinsuf ficient traction.
If yo ufa ilto adapt your driving style, 4MATIC can
neither reduce therisk of an accident nor over‐
ri de the la wsof ph ysics. 4MATIC cannot take
account of road, weather and traf fic conditions.
4MATIC is only an aid. You are responsible espe‐
cially for maintaining a safe dis tance from the
ve hicle in front, forve hicle speed, for braking in
good time and forst ay ing in lane.
% In wint ryroad conditions, the maximum
ef fect of 4MATIC can be achie ved only if you
use winter tyres (M+S tyres), with sn ow
ch ains if necessar y. Re
fuelling Re
fuelling theve hicle &
WARNING Risk offire or explosion from
fuel
Fu els are highly flammable. #
Fire, naked flames, smoking and crea‐
tion of spar ksmust be avoided. #
Swit choff the ignition and, if available,
th est ationary heater, before and while
re fuelling theve hicle. &
WARNING Risk of inju ryfrom fuels
Fu els are poisonous and hazardous to your
health. #
Do not swallow fuel or let it come into
contact with skin, eyes or clo thing. #
Do not inhale fuel vapour. #
Keep children away from fuel. #
Keep doors and windo wsclosed du ring
th ere fuelling process. If
yo u or other people come into contact with
fuel, obser vethefo llowing: #
Immediately rinse fuel off your skin with
soap and water. #
If fuel comes into contact with your
ey es, immediately rinse them thor‐
oughly with clean water.Seek medical
attention immediately. #
Ifyo u swallow fuel, seek medical atten‐
tion immediatel y.Do not induce vomit‐
ing. #
Change immediately out of clo thing that
has come into con tact wi thfuel. &
WARNING Risk offire and explosion due
to electros tatic charge
Electros tatic charge can igni tefuel vapour. #
Before you open the fuel filler cap or
ta ke hold of the pump nozzle, touch the
me tallic vehicle body. Driving and parking
15 5

R
Ifyo u unfas tenyo ur seat belt and open the
driver's door (e.g. tochange drivers or take a
break).
Setting ATTENTION ASSI ST
Multimedia sy stem:
4 Vehicle 5
k Assistance
5 ATTENTION ASSIST
Setting options #
Select Standard, SensitiveorOff.
Suggesting a rest area #
Select Suggest rest area .#
Activate Oor deacti vate the function ª.
If AT TENTION ASSIST de tects fatigue or
increasing la ckof attention, it suggests a
re st area in the vicinit y. #
Select a sugges tedre st area: you are gui‐
ded tothe selected rest area. Cruise cont
rol and limiter Fu
nction of cruise control
Cruise cont rolre gulates the speed totheva lue
selec tedby the driver.
If yo u accelerate toove rtake, forex ample, the
st ored speed is not dele ted. If youre mo veyour
fo ot from the accelerator pedal af terove rtaking,
cruise control will resume speed regulation back
to thestored speed.
Yo u can store any speed abo ve20 km/h up to
th e maximum design speed or up tothe set win‐
te r tyre limit.
Obser vethe no tes on driving sy stems and your
re sponsibility; you may otherwise failto recog‐
nise dangers (/ page 168).
Me rcedes‑AMG vehicles: cruise control is avail‐
able up toa maximum speed of 250 km/h.
Displ ays on the multifunction display
R h (gre y): cruise cont rol is selec ted but
not yet acti vated.
R h (green): cruise control is active. A
stored speed appears along with theh dis‐
pla y.
% The segments extending from the cur rent
st ored speed tothe end of the scale, or to
th e set winter tyre limit, light up in the
speedome ter.
Sy stem limits
Cruise control may be unable tomaintain the
st ored speed on uphill gradients. The stored
speed is resumed when the gradient evens out.
Change into a lo werge ar in good time on long
and steep downhill gradients. Take particular
no te ofthis when driving a laden vehicle. By
doing so, you will make use of the engine's brak‐
ing ef fect. This relie vesth e load on the brake
sy stem and pr events the brakes from overheat‐
ing and wearing tooqu ickl y.
Do not use cruise control in thefo llowing situa‐
tions:
R In traf fic situations whi chrequ ire frequent
ch anges of speed, e.g. in heavy traf fic, on
winding roads. 176
Driving and pa rking

Also,
the speed is reduced if the turn signal indi‐
cator tochange lanes is swit ched on and one of
th efo llowing situations is de tected:
R Turning off at junctions
R Driving on slowing-down lanes
R Driving on lanes adjacent toslowing-down
lanes
The driver is responsible forch oosing theright
speed and observing other road users. This
applies in particular tojunctions, roundabouts
and traf fic lights, as route-based speed adap ta‐
tion does not brake theve hicle toast andstill.
When route guidance is active, thefirs t speed
adjustment is car ried out automaticall y.Ifthe
turn signal indica tor is switched on, the selected
ro ute is confirmed and fur ther speed adjustment
is activated.
Speed adap tation is cancelled in thefo llowing
cases:
R Ifth e turn signal indicator is switched off
before thero ute event.
R Ifth e driver depresses the accelerator or
brake pedal during the process. Sy
stem limits
Ro ute-based speed adap tation does not take
ri ght of wayre gulations into account. The driver
is responsible for complying with road traf fic
re gulations and driving at a suitable speed.
The speed adap tation made bythe sy stem may
not alw ays be suitable, particular lyin thefo llow‐
ing situations:
R thero ad's course not clear lyvisible
R road nar rowing
R varying maximum permissible speeds in indi‐
vidual lanes, forex ample at tollst ations
R wetro ad sur faces, snow or ice
R when towing a trailer
In these situations the driver must inter vene
acco rding ly. &
WARNING Risk of accident in spi teof
ro ute-based speed adap tation
Ro ute-based speed adap tation can malfunc‐
tion or be temp orarily una vailable in thefo l‐
lowing situations: R
Ifth e driver does not follow the calcula‐
te dro ute
R If map data is not up-to-date or available
R Intheeve nt of roadwor ks
R In bad weather or road conditions
R Ifth e accelera tor pedal is depressed
R Intheeve nt of electronical lydispla yed
speed limitations #
Adapt the speed tothe traf fic situation. Setting
route-based speed adjustment
Re quirements:
R Active Dis tance Assi stDISTRONIC is acti va‐
te d.
Multimedia sy stem:
4 Vehicle 5
k Assistance
5 Speed adjustment #
Activate Oor deacti vate ª the function. Driving and parking
18 5