boot MERCEDES-BENZ C-CLASS CABRIOLET 2021 Owners Manual

Symbols
........................................................ 5At
agl ance .................................................... 6
Cockpit ........................................................... 6
Indica tor and warning lamps (s tandard) ........ 10
Indicator and warning lamps (widesc reen
cockpit) ......................................................... 12
Overhead contro l panel ................................ 14
Door operating unit and seat adjustment ..... 16
Emergencies and breakdowns ...................... 18Digital Owner's Manual
.............................20
Calling up the Digital Owner's Manual ..........20 Genera
l notes............................................. 21
Pr otection of the environment ......................21
Ta ke -ba ckof end-of-life vehicles ...................21
Mercedes-Benz GenuineParts ....................... 22
Owner's Manual ...........................................23
Operating saf ety .......................................... .23
Declaration of conformity ............................. 25
Diagno stics connection ................................ 29
Qualified specialist workshop ....................... 31Ve
hicle registration ....................................... 31
Cor rect use of theve hicle ............................. 31
Information on the REA CHregulation ........... 31
No tesfo r persons with electronic medi‐
cal aids ......................................................... 32
Implied warranty .......................................... .32
QR code forre scue card ...............................33
Data storage .................................................33
Copyright ...................................................... 36 Occupant saf
ety......................................... 37
Re stra int sy stem ...........................................37
Seat belts ..................................................... 39
Airbags ......................................................... 44
Ro ll bar ........................................................ .51
PRE-SAFE ®
sy stem ....................................... 52
Safely transporting children in theve hi‐
cle ................................................................53
No tes on pets in theve hicle .......................... 71 Opening and closing
.................................. 72
Ke y .............................................................. .72
Doo rs............................................................ 75
Boot .............................................................. 80 Soft
top .........................................................81
Side windo ws............................................... 88
Anti-theft pr otection .....................................92 Seats and
stowing ..................................... 95
No tes on the cor rect driver's seat posi‐
tion ............................................................... 95
Seats ............................................................ 96
St eering wheel ............................................ 106
Easy entry and exitfeature ........................ .107
Memory function ........................................1 09
St ow age areas ............................................ .110
Soc kets ....................................................... 11 5
Wi reless charging of the mobile phone
and connection with theex terior aerial .......1 16
Fitting/removing thefloor mats .................. 11 8 Light and sight
.......................................... 11 9
Exterior lighting ........................................... 11 9
Interior lighting ........................................... 12 6
Wi ndsc reen wipers and windscreen
wa sher sy stem ............................................ 127
Mir rors ........................................................ 13 02
Contents

1
Operates the memory function →
11 0
2 Adjusts the seats electrically →
99
3 Switches the seat heating on/off →
103
4 Switches the seat ventilation on/o ff →
104
5 Switches AIRSCARF on/off →
105
6 Operates the outside mir rors →
13 0
7 Opens the boot lid →
80
8 Opens/closes theright side window →
88
9 Opens/closes the left side window →
88
A Opens/closes there ar right side window →
88
B Opens/closes there ar left side wind ow→
88
C Opens the door →
76 D
Locks/unloc kstheve hicle →
76
E Adjusts the seat fore -and-aft position →
98
F Only vehicles with Seat Comfort Package:
adjusts the seat cushion length →
98
G Adjusts the 4-w aylumbar support →
99
H Seat adjustment using the multimedia sy stem →
101
I Adjusts the head restra ints →
99
J Only vehicles with Seat Comfort Package:
adjusts the seat cushion inclination →
98
K Adjusts the seat height →
98
L Adjusts the seat backrest inclination →
98 At
aglance – Door operating unit and seat adjustment 17

Size class –
Equipment
Re
ar seat behind driv‐
er's seat
B – ISO/F2 IUF
B1 – ISO/F2X IUF
A – ISO/F3 IUF
IL Suitable for ISOFIX child restra int sy stems according tothe
ta ble in "Overview of there commended child restra int sy stems",
or if theve hicle and the seat are lis ted on thech ild restrai nt sys‐
te m manufacturer's vehicle model list.
X Not suitable for an ISOFIX child restra int sy stem in this we ight
group and/or size class.
IUF Suitable forfo rw ard-facing ISOFIX child restra int sy stems of
th e "Universal" category in this we ight group. Overview of suitability of
the seats for
attaching i‑Size child restra int sy stems
i‑Size is a standardised securing sy stem for spe‐
cially designed child restra int sy stems.
° The symbol indicates seats suitable for
attaching an i‑Size child restra int sy stem in accordance with UN R129
(/
page 58).
Child restra int sy stems that are permit ted
in accordance with UN R44 as per the
ISOFIX tables (/ page 60) or UN R129 as
per thefo llowing i‑Size tables may be
attached.
i‑Size child restra int sy stems (ISO/R2, ISO/
F2X, ISO/B2, ISO/B3) Fr
ont passenger
seat Left/right
rear seat
Xi ‑U
X Not suitable for an i-Size
ch ild restrai nt sy stem in the
"Universal" categor y.i-U Suitable
forfo rw ard-facing
and rear wa rd-facing i-Size
ch ild restrai nt sy stems in the
"Universal" categor y. Fi
tting an ISOFIX or i‑Size child restra int sys‐
te m on the rear seat &
WARNING Risk of accident if there ar
ben chseat, rear seat and seat backrest
are not engaged
The rear ben chseat, rear seat and seat back‐
re st may fold forw ards, even while theve hi‐
cle is in motion.
R As a result, theve hicle occupant will be
pressed into the seat belt with increased
fo rc e. The seat belt will not be able to
pr otect as intended and could cause
additional injur y.
R Objects or loads in the boot or load com‐
partment cann otbe restra ined bythe
seat backrest. #
Make sure that there ar ben chseat, the
re ar seat and the seat backrest are
engaged before everytrip. If
th e left and right seat backrests are not
engaged and loc ked in place, this will be shown 62
Occupant saf ety

on
the multifunction display on the instrument
clus ter.
¯ Ifth ech ild restra int sy stem is equipped
with a TopTe ther belt:
The risk of injury may be reduced byTo p
Te ther. The TopTe ther belt enables an
additional connection between thech ild
re stra int sy stem attached with ISOFIX or
i‑Size and theve hicle. #
Place the ISOFIX or i‑Size child restra int sys‐
te m with TopTe ther on there ar seat. It is
essential tocomply wi th thech ild restra int
sy stem manufacturer's ins tallation instruc‐
tions. #
Foldthere ar seat backrest forw ard. #
Attach TopTe ther hook 2toTopTe ther
anchorage 1. #
Foldthere ar seat backrest bac k. #
Make sure that TopTe ther belt 3is not
twis ted and there ar seat backrest is loc ked
in place. #
Secure thech ild restra int sy stem with ISOFIX
or i‑Size. #
Tension TopTe ther belt 3from the boot. #
Make sure that there is suf ficient seat belt
st ra pfo r pulling tight. #
It is essential tocomply wi th thech ild
re stra int sy stem manufacturer's ins tallation
instructions. Securing
thech ild restra int sy stem with the
seat belt Note
s onthe suitability of seats for attach‐
ing belt-secured child restra int sy stems
Re ar seats
We ight category 0: up to10 kg
Left/right rear seat U, L
We ight category 0+: up to13 kg
Left/right rear seat U, L
We ight category I: 9 to18 kg Occupant saf
ety65

L Suitable
for semi-universal child restra int sy stems
according totheta ble in "Recommended child
re stra int sy stems", or if theve hicle and the seat are
lis ted in thech ild restrai nt sy stem manufacturer's
ve hicle model list.
UF Suitable forfo rw ard-facing child restra int sy stems
of the "Universal" category in this we ight categor y. Securing
thech ild restra int sy stem with the
seat belt on there ar seat &
WARNING Risk of accident if there ar
ben chseat, rear seat and seat backrest
are not engaged
The rear ben chseat, rear seat and seat back‐
re st may fold forw ards, even while theve hi‐
cle is in motion.
R As a result, theve hicle occupant will be
pressed into the seat belt with increased
fo rc e. The seat belt will not be able to
pr otect as intended and could cause
additional injur y. R
Objects or loads in the boot or load com‐
partment cann otbe restra ined bythe
seat backrest. #
Make sure that there ar ben chseat, the
re ar seat and the seat backrest are
engaged before everytrip. If
th e left and right seat backrests are not
engaged and loc ked in place, this will be shown
on the multifunction display on the instrument
clus ter.
When fitting a belt-secured child restra int
sy stem, obser vethefo llowing:
O Alw
ays comply with the manufacturer's
ins tallation and operating instructions for
th ech ild restra int sy stem used.
O Fo
r a child restra int sy stem in the "Univer‐
sal" or "Semi-Universal" categor y,make
sure that the sy stem has been appr oved for
th eve hicle seat.
Obser vethe no tes under "Suitability of
seats for attaching belt-secu redch ild
re stra int sy stems" (/ page 65). O
When using a
weight category 0/0+
baby car seat and a weight category I
re ar wa rd-facing child restra int sy stem
on a rear seat: adjustthe front seat so that
th e seat does not touch thech ild restra int
sy stem.
O When using a
weight category I forw ard-
fa cing child restra int sy stem: remo vethe
head restra int from there spective seat, if
possible.
Af terth ech ild restra int sy stem has been
re mo ved, replace the head restra ints again
immediately and adjust them cor rectly.
O The ba
ckrest of thefo rw ard-facing child
re stra int sy stem must, as far as possible, be
re sting on the seat backrest of there ar
seat.
O If
th e head restra int of thech ild seat cannot
be fully extended when it is ins talled in the
ve hicle, this will result in restrictions on the
maximum size setting forch ild restra int sys‐
te ms in weight category II or III.
Contact with thero of when the head
re stra int is fully extended and lo cked in Occupant saf
ety67

Key
Overview of
the function &
WARNING Risk of accident and inju ry
due toleaving children unat tended in the
ve hicle
If ch ildren are left unat tended in theve hicle,
th ey could, in pa rticular:
R open doors, thereby endangering other
persons or road users.
R get out and be stru ck byoncoming traf‐
fi c.
R ope rate ve hicle equipment and become
trapped, forex ample.
In addition, thech ildren could also set the
ve hicle in motion by,fo rex ample:
R releasing the parking brake.
R changing the transmission position.
R starting theve hicle. #
Never lea vechildren unat tended in the
ve hicle. #
When leaving theve hicle, alw aysta ke
th eke y with you and lock theve hicle. #
Keep theve hicle key out of there ach of
ch ildren. *
NO
TEDama getotheke y caused by
magnetic fields #
Keep theke yaw ay from strong mag‐
netic fields. Ve
hicle key
1 Locks
2 Indicator lamp 3
Unloc ks
4 Opens the boot lid
% If indicator lamp 2does not light up af ter
pressing theÜ orß button, the bat‐
te ry iswe ak or possibly dischar ged. Re place
th e battery as soon as possible.
Re place theke y bat tery ( / page 74).
The key loc ksand unlo cksth efo llowing compo‐
nents:
R doors
R fuel filler flap
R boot lid
If th eve hicle is not opened within appr oximately
40 seconds af ter unlocking, it loc ksagain. Anti-
th eft pr otection is primed again.
Do not keep theke yto get her with electronic
devices or me tal objects. This can af fect the
ke y's functionalit y.72
Opening and closing

This does not lock or unlock
the fuel filler flap.
The vehicle is not unloc ked:
R Ifyo u ha veloc kedth eve hicle using thekey.
R Ifyo u ha veloc kedth eve hicle using KEY‐
LESS-GO. Locking/unlocking
theve hicle with KEY‐
LESS-GO Re
quirements:
R The key is outside theve hicle.
R The dis tance between theke y and theve hicle
does not exceed 1 m.
R The driver's door and the door on which the
door handle is used are closed.
* NO
TEDama getotheve hicle caused by
unin tentionally opening the boot lid R
when using an automatic car wash
R when using a high pressure cleaner #
Deactivate the function of theke y in
th ese situations. or
#
Make sure that theke y is at a minimum
dis tance of 3 maw ay from theve hicle. Obser
vethefo llowing information:
R Information on washing theve hicle in a car
wa sh (/ page 362)
R Information on using a high-pressure cleaner
(/ page 364) #
Tounlo cktheve hicle: touch the inner sur‐
fa ce of the door handle. #
Tolock theve hicle: touch sensor sur face
1 or2. #
Convenience closing: touch recessed sen‐
sor su rface 2until the closing process has
been comple ted.
% Further information on con venience closing
(/ page 90). Opening and closing
77

If
yo u open the boot lid from outside, the boot lid
is automatically unloc ked. Problems with KEYLESS-GO, troubleshooting
Yo
u can no lon ger lo ckor unlock theve hicle
using KEYLESS-GO
Po ssible causes:
R The function of theke y has been deacti vated.
R The key bat tery iswe ak or dischar ged. #
Activate the function of theke y ( / page 73). #
Check the battery using the indicator lamp
(/ page 72). #
Replace theke y bat tery, if necessary
(/ page 74). #
Use there placement key. #
Use the emer gency keyto lock or unlock
(/ page 79). #
Have theve hicle and keych ecked at a quali‐
fi ed specialist workshop. There is inter
fere nce from a po werful radio
signal source
Po ssible causes if the function of KEYLESS-GO is
impaired:
R high voltage po wer lines
R mobile phones
R electronic devices (no tebooks, tablets)
R shielding due tome tal objects or induction
loops for electrical gatesystems or auto‐
matic bar riers #
Make sure that there is suf ficient di stance
between theke y and the po tential sou rce of
inter fere nce. Ac
tivating/deactivating the automatic lo ck‐
ing feature The
vehicle is loc ked automatically when the
ignition is switched on and the wheels are turn‐
ing fast erthan walking pace. #
Toactivate: press and hold button 2for
appr oximately five seconds until an acoustic
signal sounds. #
Todeactivate: press and hold button 1for
appr oximately five seconds until an acoustic
signal sounds. 78
Opening and closing

Boot
Opening the bo
otlid &
DANG ER Risk of exhaust gas poisoning
Combustion engines emit poisonous exhaust
ga ses such as carbon monoxide. Exhaust
ga ses can enter theve hicle interior if the
boot lid is open when the engine is running,
especially if theve hicle is in motion. #
Alw ays switch off the engine before
opening the boot lid. #
Never drive with the boot lid open. *
NO
TEDama getothe boot lid byobs ta‐
cles ab ovetheve hicle The boot lid swings upwards when it is
opened. #
Therefore, make sure that there is suf fi‐
cient clearance ab ovethe boot lid. #
Pull boot lid remo teoperating switch 1. #
Press and hold thep button on thekey. Closing
the boot lid &
WARNING Risk of inju ryfrom unsecu red
items in theve hicle
If objects, luggage or loads are not secured
or not secured suf ficientl y,they could slip,
tip ove r or be throw n around and thereby hit
ve hicle occupants.
There is a risk of injur y,particularly in the
ev ent of sudden braking or a sudden change
in direction. #
Alw aysstow objects in such a wayth at
th ey cannot be thro wn around. #
Before the journe y,secure objects, lug‐
ga ge or loads against slipping or tipping
ove r. Obser
vethe no tes on loading theve hicle.
Note s on closing the boot lid: your vehicle is
equipped with automatic keyre cognition. If a key
belonging totheve hicle is de tected in theve hi‐
cle, the boot lid will not be loc ked and will pop
open again. 80
Opening and closing

No
tethat the boot lid will not be loc ked if thefo l‐
lowing situation occurs:
R You ha veloc kedth eve hicle and close the
boot lid while a key belonging totheve hicle
is inside theve hicle.
and
R A second key belonging totheve hicle is not
de tected outside theve hicle.
Au tomatic keyre cognition is only an aid and is
not a substitu teforyo ur attentiveness. #
Before locking, ensure that at least one key
belonging totheve hicle is outside theve hi‐
cle. #
Toclose the boot lid: pullthe boot lid down‐
wa rds using the handle recess and push it
closed. Switching separate bo
otlocking on or off If
yo u centrally unlo ck theve hicle while separate
locking is activated, the boot will remain loc ked. #
Toswitch on: slidethe switch toposition
1. #
Toswitch off: slidethe switch toposition
2.
% If an accident has been de tected, the boot
will unlock even if separate lo cking is
switched on. Ac
tivating/deactivating the bo otlid opening
limiter Multimedia sy
stem:
4 Vehicle 5
î Vehicle settings
5 Boot lid open. limiter
This function allo wsyouto avoid bumping the
boot lid on a low garage ceiling, forex ample. #
Activate Oor deacti vate ª the function. Soft
top Opening or closing
the soft top using the
so ft-top switch &
WARNING Risk of becoming trapped
due tothe soft top lo wering unexpect‐
ed ly
If yo u do not fully open/close the soft top,
th e soft-to phy draulics will depressurise af ter
a short time. #
Alw ays fully open or close the soft top. Opening and closing
81