heater MERCEDES-BENZ C-CLASS CABRIOLET 2021 Owners Manual

1
Steering wheel gearshift paddles →
15 3
2 Combination swit ch →
121
3 Instrument display →
227
4 DIRECT SELECT le ver →
15 0
5 Media display →
247
6 Glovecompa rtment →
11 2
7 Start/ stop button →
13 8
8 Climate cont rol sy stems →
13 3
9 Calls up the main functions of the multimedia
sy stem →
251
A Hazard warning light sy stem →
121
B PASSENGER AIR BAG indicator lamps →
49
C Stow age compartment →
11 2
D Controller forvo lume and switching sound
on/off →
247
E Switches the multimedia sy stem on/off →
247
F Extends/r etra cts the seat belt extender →
41 G
Opens and closes the soft top →
81
H Activates and deacti vates AIR CAP →
84
I Opens thestow age compartment →
11 2
J Opening and closing the side windo ws →
88
K ECO start/ stop function →
14 6
L 360° camera →
206
M Sets theve hicle le vel →
202
N DYNA MIC SELECT switch →
14 9
O Touchpad →
24 8
P Control panel forth e multimedia sy stem →
228
Q Adjusting thesteering wheel electrically →
106
Switches thesteering wheel heater on/off →
107
R Control panel:
On-board co mputer →
228
Cruise cont rol or variable limiter →
17 7
Ac tive Dis tance Assi stDISTRONIC →
182
S Diagno stics connection →
29 At
aglance – Cockpit 7

Wire
less applications in theve hicle Te
ch nology Frequency rang eT ransmission output/magnetic field
st re ngth
Con venience central lo cking sy stem 20 kHz (9–90 kHz)≤ 72dBμA/m at 10 m
Wi reless po wer transmission 105 kHz (90–1 19kHz) ≤ 42 dBμA/m at10 m
Con venience central lo cking sy stem 120 kHz (1 19–135 kHz)≤ 42 dBμA/m at10 m
Wi reless po wer transmission 127 kHz (1 19–135 kHz)≤ 66 dBµA/m at10m with the magnetic field
st re ngth le vel decreasing 3dB/oc tave abo ve11 9
kHz
Nea r-field communication 13.553–13.567 MHz ≤ 42 dBμA/m at10 m
Con venience central lo cking sy stem, garage
door opener, tyre pressure monitoring sy stem 433 MHz (433.05–434.79 MHz)≤
10mW ERP
Heater boos ter function remo tecontrol, garage
door opener 868 MHz (868.0–868.6 MHz
)≤25 mW ERP
Heater boos ter function remo tecontrol, garage
door opener 869 MHz (868.7–869.2 MHz
)≤25 mW ERP
Blue tooth ®
, Kleer, RLAN, remo tecontrol, wi re‐
less headphones 2.4 GHz ISM band (2400–2483.5 MHz
)≤100 mW EIRP 26
General no tes

#
If necessar y,release the head restra int and
push it down. #
Pull seat release handle 1and fold the seat
backrest forw ards until the seat backrest
engages. #
Push the seat as farfo rw ards as it will go. Fo
lding back #
Push the seat back horizon tally by the seat
backrest until it reaches the seat position
th at wa s pr eviously set. #
Foldthe seat backrest back until it engages.
Do so as smoo thly as possible.
If th e seat backrest is not engaged, this will
be shown on the multifunction display on the
instrument clus ter.A wa rning tone will also
sound. #
Afterth e seat backrest has been folded
bac k,check the position of the head restra int
and set it tothe cor rect position.
If th e set seat position can no longer be reached,
e.g. because of luggage in there ar foot we ll or
because occupants ha veentered there ar of the
ve hicle: #
Pull seat release handle 1again and return
th e seat backrest toan upright position.
The seat will lock in the new fore -and-aft
position. Switching the seat heating on/o
ff &
WARNING Risk of bu rns due torepeat‐
edly switching on the seat heating
Re peatedly switching on the seat heating can
cause the seat cushion and seat backrest
padding tobecome very hot.
In particular, the health of persons with limi‐
te dte mp erature sensitivity or a limited ability
to react tohigh temp eratures may be af fec‐
te d or they may even suf fer burn-like injuries. #
Do not repeatedly switch on the seat
heating. To
protect against overheating, the seat heating
may be temp orarily deactivated af ter it is
switched on repeatedly.
* NO
TEDama getothe seats caused by
objects or documents when the seat
heater is switched on When
the seat heater is switched on, over‐
heating may occur due toobjects or docu‐ Seats and
stowing 103

ments placed on
the seats e.g. seat cushions
or child seats. This could cause damage to
th e seat sur face. #
Makesure that no objects or docu‐
ments are on the seats when the seat
heater is switched on. Re
quirements:
R The po wer supply is switched on. #
Press button 1repeatedly until the desired
heating le vel is set.
Depending on the heating le vel, up tothree
indicator lamps will light up. If all indicator
lamps are off, the seat heating is switched
off.
% The seat heating will automatically switch
down from theth re e heating le vels af ter 8,
10 and 20 minutes until the seat heating is
switched off. Switching
the seat ventilation on/off Re
quirements:
R The po wer supply is switched on. #
Press button 1repeatedly until the desired
blo wer setting has been reached.
Depending on the blo wer setting, up tothree
indicator lamps will light up. If all indicator
lamps are off, the seat ventilation is switched
off. 104
Seats and stowing

1
Toadjust the dis tance tothesteering wheel
2 Toadjust the height #
Save the settings with the memory function
(/ page 110). Swi
tching the steering wheel heater on/off Re
quirements:
R The ignition is switched on. #
Turn the le ver in the direction of ar row1or
2.
If indicator lamp 3lights up, thesteering
wheel heater is switched on. When
you swit ch the ignition off, thesteering
wheel heater will switch off. Easy entry and
exitfeature Using
the easy entry and exitfeature &
WARNING Risk of accident when pulling
aw ay during the adjustment process for
th e easy exitfeature
Yo u could lose cont rol of theve hicle. #
Alw ayswa it until the adjustment proc‐
ess is comple tebefore pulling away. &
WARNING Risk of becoming trapped
du ring adjustment of the easy entry and
ex itfeature
Yo u and other vehicle occupants – particu‐
lar lych ildren – could become trapped. #
Ensure that no one has a body part in
th e sweep of thesteering wheel or driv‐
er's seat. Seats and
stowing 107

Overview of climate control sy
stems Note
s on climate control An interior air
filter in combination with the pre‐
fi lter in the engine compartment must alw ays be
used so that the air conditioning sy stem, pollu‐
tion le vel monitoring and the air filtration work
cor rectl y.Use filters recommended and
appr ovedby Mercedes-Benz. Alw ays ha vemain‐
te nance workcar ried out at a qualified specialist
wo rkshop. Overview of
the air conditioning control
panel The indicator lamps on
the buttons indicate that
th e cor responding function is activated. THERMATIC air conditioning contro
l panel
without stationary heater
1 w Setsthete mp erature on the driver's
side
2 _ Setsthe air distribution
3 H Setsthe air flow or switches off climate
control
4 Ã Sets climate control toautomatic
(/ page 134)
5 ¬ Demists the windscreen
6 A Calls up the air conditioning menu
7 ¤ Switches there ar wind owheater
on/off 8
0 Switches synchronisation on/off
(/ page 134)
9 g Switches air- recirculation mode on/off
(/ page 134)
A ¿ Switches the A/C function on/off
(/ page 134)
B w Setsthete mp erature on the front
passenger side Operating
the clima tecont rol sy stem Switching clima
tecont rol on/off #
Toswitch on: setthe air flow toleve l 1 or
higher using theH button. #
Toswitch off: setthe air flow toleve l 0 using
th eH button.
If climate control is switched off, the windo ws
may mist up more quickl y.Switch climate con‐
trol off only brie fly. Climate cont
rol13 3

&
WARNING Risk of skidding and of an
accident due toshifting down on slippery
ro ad sur faces
If yo u shift down on slippery road sur faces to
inc rease the engine braking ef fect, the drive
wheels may lose traction. #
Do not shift down on slippery road sur‐
fa ces toinc rease the engine braking
ef fect. &
DANG ER Risk of fata l injury due topoi‐
sonous exhaust gases
If th eta ilpipe is bloc ked or suf ficient ventila‐
tion is not possible, poisonous exhaust gases
such as carbon monoxide may enter theve hi‐
cle. This is the case when theve hicle
becomes stuck in sn ow,fo rex ample. #
Keep theta ilpipe and the area around
th eve hicle free from snow when the
engine or thest ationary heater are run‐
ning. #
Open a window on the side of theve hi‐
cle facing away from the wind toensure
an adequate supply of fresh air. &
WARNING Risk of accident due tothe
brake sy stem overheating
If yo u lea veyour foot on the brake pedal
when driving, the brake sy stem may over‐
heat.
This increases the braking dis tance and the
brake sy stem may evenfa il. #
Never use the brake pedal as a foot re st. #
Do not depress the brake pedal and the
accelerator pedal at the same time
while driving. *
NO
TEEngine dama gedue toexcessively
high engine speeds The engine will be damaged if
you drive with
th e engine in theov errevving range. #
Do not drive wi th the engine in theove r‐
re vving range. *
NO
TECausing wearto the brake linings
by permanently depressing the brake
pedal #
Do not permanently depress the brake
pedal while driving. #
Touse braking ef fect of the engine,
shift toa lo werge ar in good time. *
NO
TEDama getothe driv etra in and
engine when pulling away #
Do not warm upthe engine while the
ve hicle is stationar y.Pull away immedi‐
atel y. #
Avoid high engine speeds and driving at
full thro ttle until the engine has reached
its operating temp erature. *
NO
TEDama getothe catalytic con verter
due tonon-combu sted fuel The engine is not
running smo othly and is
misfiring. Driving and parking
14 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

1
Fuelfiller flap
2 Brac ketfo r fuel filler cap
3 Tyre pressure table
4 QR code forre scue card
5 Stationary heater indication
6 Fuel type #
Press on the back area of fuel filler flap 1. #
Turn the fuel filler cap anti-clockwise and
re mo veit. #
Insert fuel filler cap from abo veinto brac ket
2 . #
Comple tely inse rtthe pump nozzle into the
ta nk filler nec k,hook in place and refuel. #
Only fill th e fuel tank until the pump nozzle
switches off.
% Vehicles with a diesel engine: theta nk
fi ller neck is designed forre fuelling at diesel
fi lling pumps.
% Vehicles with a diesel engine: whenthe
fuel tank is compl etely em pty, top up with at
least 5 litres of diesel.
% Vehicles with a diesel engine: use afiller
neck with a lar gediame terfo rve hicles with
a diesel engine when topping up fuel from a
fuel can. Otherwise, thefiller neck cannot
slide into theta nk. #
Replace the cap on thefiller neck and turn
clockwise until it engages audibl y. #
Close fuel filler flap 1. Ad
Blue ®
(vehicles with a diesel engine on ly) Note
s onrefilling AdBlue ®
Ad Blue ®
is a wate r-soluble fluid forth e NOx
ex haust gas af tertre atment of diesel engines. In
order forth eex haust gas af tertre atment tofunc‐
tion proper ly, only use AdBlue ®
in acco rdance
with ISO 22 241.
Ad Blue ®
is ch aracterised bythefo llowing:
R non-t oxic
R colourless and odourless
R non-flammable
If yo u open theAd Blue ®
tank, small amounts of
ammonia vapour may be released. Only fill the
Ad Blue ®
tank in well-ventilated areas.
Do not let AdBlue ®
come into contact wi thskin,
ey es or clo thes. Keep AdBlue ®
aw ay from chil‐
dren.
Do not ingest AdBlue ®
. If AdBlue ®
is swallo wed,
immediately rinse your mouth out thoroughly.
Drink plenty of water.Seek medical attention at
once. 15 8
Driving and pa rking

#
Fold co ver1 up in the direction of the
ar row. #
Slide co ver2 of positive clamp 3onthe
jump-s tarting connection point in the direc‐
tion of the ar row.
St arting assi stance #
Connect positive contact 3onyour vehicle
to the positive term inal of the donor battery
using the jump lead. Alw ays begin with posi‐
tive clamp 3onyour ow nve hicle firs t. #
Start the engine of the donor vehicle and run
it at idling speed. #
Connect the negative term inal of the donor
battery toear thpoint 4ofyour vehicle
using the jump lead. Begin with the donor
battery firs t. #
Start the engine of your ow nve hicle. #
Let the engines runfo r se veral minutes. #
Before disconnecting the jump leads, switch
on an electrical consumer in your ow nve hi‐
cle, e.g. there ar wind owheater or the light‐
ing.
When thest arting assis tance procedu reis com‐
ple te: #
First,re mo vethe jump leads from ear thpoint
4 and the negative term inal of the donor
batter y,then from positive conta ct3 and
th e positive term inal of the donor batter y.
Begin ea chtime wi th the conta cts onyour
ow nve hicle firs t. #
Afterre moving the jump leads, close co ver
2 of positive contact 3. #
Close co ver1. Breakdown assi
stance 385