brake MERCEDES-BENZ C-CLASS CABRIOLET 2021 Owners Manual

T
Opens the bonn et →
356
U Electric parking brake →
16 4
V Light switch →
11 9
W Control panel for: Ac
tive Steering Assist →
187
Ac tive Lane Keeping Assist →
200
Pa rking Assist PARKTRONIC →
213
Head-up display →
231 8
Ataglance – Cockpit

1
L Distance warning →
494
2 Ð Powe rst eering →
488
3 #! Turn signal lights →
121
4 ; Engine diagnostics →
489
5 % Diesel engine: preglow
6 ! Electric pa rking brake (red) →
492
7 J Brakes (red) →
492
8 ÿ Coolant temp erature →
489
9 Coolant temp erature display →
227
A J Brakes (yellow) →
492
B ! Electric pa rking brake (yellow) →
492
C ! ABS →
495 D
6 Restra int sy stem →
487
E ü Seat belt →
487
F K High beam →
121
G L Low beam →
11 9
H 8 Reser vefuel with fuel filler flap location
indicator →
489
I Fuel le vel →
227
J T Standing lights →
11 9
K R Rear fog light →
12 0
L h Tyre pressure monitoring sy stem →
498
M å ESP®
OFF →
495
N ÷ ESP®
→
495 At
aglance – Indicator and warning lamps (s tanda rd) 11

1
#! Turn signal lights →
121
2 R Rear fog light →
12 0
3 K High beam →
121
L Low beam →
11 9
T Standing lights →
11 9
4 ÿ Coolant temp erature →
489
5 Coolant temp erature display →
227
6 L Distance warning →
494
7 ü Seat belt →
487
8 h Tyre pressure monitoring sy stem →
498
9 Ù Powe rst eering →
488
A ! Electric pa rking brake (yellow) →
492
B ! Electric parking brake (red) →
492
C 6 Restra int sy stem →
487 D
ï Trailer hit ch →
488
E J Brakes (red) →
492
F 8 Reser vefuel with fuel filler flap location
indicator →
489
G Fuel le vel →
227
H ä Suspension →
494
I J Brakes (yell ow) →
492
J # Electrical fault →
489
K ; Engine diagnostics →
489
L % Diesel engine: preglow
M ! ABS →
495
N å ESP®
OFF →
495
÷ ESP®
→
495 At
aglance – Indicator and warning lamps (widesc reen cockpit) 13

Mercedes-Benz GenuineParts
+ ENVIRONMENTAL
NOTEEnvironmental
dama gecaused bynot using recycled
re conditioned components Mercedes‑Benz
AGoffers recycled recondi‐
tioned components and pa rts with the same
qu ality as new parts. The same entitlement
from the implied warranty is valid as for new
parts. #
Recycled reconditioned components
and pa rts from Mercedes‑Benz AG.*
NO
TEImpairment of the operating ef fi‐
ciency of there stra int sy stems from
ins talling accessory parts or from repairs
or we lding Airbags and seat belt
tensioners, as well as
control units and sensors forth ere stra int
sy stems, may be ins talled in thefo llowing
areas of your vehicle:
R doors R
door pillars
R door sills
R seats
R cockpit
R instrument clus ter
R centre console
R late ra lro of frame #
Do not ins tall accessory parts such as
audio sy stems in these areas. #
Do not car ryout repairs or welding. #
Have accesso ries retrofitted at a quali‐
fi ed specialist workshop. Yo
u could jeopardise the operating saf ety of your
ve hicle if you use parts, tyres and wheels as well
as accessories releva nt tosaf ety which ha venot
been appr ovedby Mercedes-Benz. Saf ety-re le‐
va nt sy stems, e.g. the brake sy stem, may mal‐
function. Only use Mercedes-Benz GenuineParts
or parts of equal qualit y.Only use tyres, wheels
and accessories that ha vebeen specifically
appr ovedfo ryo ur vehicle model. Mercedes-Benz
tests original parts and con ver‐
sion parts and accessories that ha vebeen spe‐
cifically appr ovedfo ryo ur vehicle model forth eir
re liability, saf ety and suitabilit y.Despite ongoing
ma rket resear ch, Mercedes-Benz is unable to
assess other parts. Mercedes-Benz therefore
accepts no responsibility forth e use of such
parts in Mercedes-Benz vehicles, even if they
ha ve been of ficially appr oved or independently
appr ovedby ate sting centre.
Cer tain parts are only of ficially appr ovedfor
ins tallation or modification if they comply wi th
legal requirements. All Mercedes-Benz Genuine‐
Pa rts meet the appr oval requ irements. The use
of non-appr oved parts may in validate theve hi‐
cle's general operating pe rmit.
This is the case in thefo llowing situations:
R theve hicle type is dif fere nt from that for
which theve hicle's general operating pe rmit
wa s granted.
R other road users could be endangered.
R theex haust gas or noise le velge ts wo rse. 22
General no tes

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

Yo
u will need toper form certain settings your‐
self. #
Ifth e seat belt pre-tensioning is not reduced,
mo vethe seat backrest back slightl y.
The locking mechanism releases. Fu
nction of PRE-SAFE ®
PLUS (anticipatory
occupant pr otection plus) PRE-
SAFE®
PLUS can de tect cer tain impacts,
particular lyan imminent rear impact, and take
pre-em ptive measures toprotect theve hicle
occupants. These measures cannot necessarily
pr eve nt an imminent impact.
PRE-SAFE ®
PLUS can implement thefo llowing
measures independently of each other:
R Tightening the seat belts on the driver's seat
and front passenger seat.
R Activating there ar hazard warning lights at a
higher flashing frequenc y.
R Increasing brake pressure when theve hicle
is stationar y.This brake application is cancel‐
led automatically when theve hicle pulls
aw ay. If an accident did not occur,
the pre-em ptive
measures that we retake n are reve rsed.
Sy stem limits
The sy stem will not initiate any action in thefo l‐
lowing situations:
R when reve rsing
or
R when theve hicle is towing a trailer and there
is a risk of a rear impact
The sy stem will not initiate any braking applica‐
tion in thefo llowing situations:
R whilst driving
or
R when entering or exiting a parking space
while using Active Parking Assist Safely transporting
children in theve hicle Alw
ays obser vewhen children are tr avelling
in theve hicle %
Also strictly obser vethe saf ety no tesfo rthe
specific situation. In this wa yyo u can recog‐ nise po
tential risks and avoid dangers if chil‐
dren are tr avelling in theve hicle
(/ page 54).
Be diligent
Bear in mind that negligence when securing a
ch ild in thech ild restra int sy stem may ha veseri‐
ous consequences. Alw ays be diligent in secur‐
ing a child carefully before everyjou rney.
To impr oveprotection forch ildren younger than
12 years old or under 1.50 m in height,
Mercedes-Benz recommends you obse rvethe
fo llowing information:
R Alw ays secure thech ild in a child restra int
sy stem suitable forth is Mercedes-Benz vehi‐
cle.
R The child restra int sy stem must be appropri‐
ate tothe age, weight and size of thech ild.
R The vehicle seat must be suitable forfitting a
ch ild restra int sy stem (/ page 58).
Ac cident statistics show that children secured
on there ar seats are general lysafer than chil‐
dren secured on the front seats. Forth is reason, Occupant saf
ety53

#
Only af fix accesso ries which ha vebeen
specially appr oved forth is ch ild
re stra int sy stem bythech ild restra int
sy stem's manufacturer. Mercedes‑Benz
recommends Mercedes-Benz
care products for cleaning child restra int sys‐
te ms recommended byMercedes-Benz.
Only use child restra int sy stems which are in
proper working condition &
WARNING Risk of inju ryor death caused
by the use of damaged child restra int
sy stems
Child restra int sy stems or their retaining sys‐
te ms that ha vebeen subjec tedto stre ss in
an accident may not be able toper form their
intended pr otective function.
It may be the case that thech ild cannot be
proper lyrestra ined. #
Alw ays immediately replace child
re stra int sy stems that ha vebeen dam‐
aged or in volved in an accident. #
Have the securing sy stems forth ech ild
re stra int sy stems checked at a qualified
specialist workshop before ins talling a
ch ild restra int sy stem again. Av
oid direct sunlight &
WARNING Risk of bu rns when thech ild
seat is exposed todirect sunlight
If th ech ild restra int sy stem is exposed to
direct sunlight or heat, parts could heat up.
Children could suf fer burns from these parts,
particularly on the me tallic parts of thech ild
re stra int sy stem. #
Alw ays make sure that thech ild
re stra int sy stem is not exposed to
direct sunlight. #
Protect thech ild restra int sy stem, e.g.
with a blank et. #
Ifth ech ild restra int sy stem has been
ex posed todirect sunlight, allow it to
cool before secu ring a child in it. #
Never lea vechildren unat tended in the
ve hicle. Obser
vewhen stopping or parking &
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. 56
Occupant saf ety

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

&
WARNING Risk of entrapment when
opening or closing the soft top
Pa rts of the body could become trapped. #
When opening or closing, make sure
that no body parts are in the vicinity of
moving components. #
Release the button if somebody
becomes trapped. *
NO
TEPossible damage tothe soft top
during opening or closing The soft
top may be damaged when it is
opened or closed. #
Ensure that suf ficient clearance is avail‐
able abo vethe soft top. #
Load the boot only below the le vel of
th e boot separator so that this is not
pushed upwards. #
Make sure that the boot lid is closed. #
Ifth efa bric is dirty, wet or icy, do not
open the soft top. #
When theve hicle is being transpor ted
(e.g. on a mo torail), do not open or
close the soft top. *
NO
TEDama getothe soft top caused by
heavy objects Heavy objects placed on
the soft-to p com‐
partment co ver can dama gethe soft top or
soft-to p compartment co ver. #
Do not place he avy objects on the soft-
to p compartment co ver. #
Do not sit on the soft-to p compartment
co ver. Fo
r saf etyre asons, Mercedes-Benz recommends
opening or closing the soft top when theve hicle
is stationar y.
To open or close the soft top while you are driv‐
ing, do not exceed a maximum speed of
50 km/h. Toavo id inter rupting the closing proc‐
ess while you are slightly exceeding this speed,
do not drive at a speed greater than 60 km/h. #
Make sure that the boot separator is closed. #
Close the boot lid. #
Switch on the ignition. #
Keep the brake pedal depressed when the
ve hicle is stationar y. #
Toopen: pull and hold soft- top switch 1
until the soft top is fully open.
The multifunction display will show the open‐
ing process of the soft top. 82
Opening and closing

Pe
rform thefo llowing steps in sequence on bo th
sides of theve hicle: #
Pull handle 5inthe direction of the ar row. #
Align folding draught stop 1 with side fix‐
ture 4ontheve hicle from abo veand insert. #
Push handle 5onfolding draught stop 1
back as far as it will go.
Fo lding draught stop 1 is loc ked. Fo
llow the instructions in reve rse order to
re mo vethefo lding draught stop. Problems with
the soft top The so
fttop will not open or close.
Po ssible causes:
R The ignition is not switched on. #
Make sure that the ignition is switched on.
R The brake pedal is not depressed with the
ve hicle stationar y. #
Dep ress the brake pedal.
R The on-board electrical sy stem voltage is too
lo w. #
Start the engine.
R The boot separator is not closed. #
Remo ve ov erhanging luggage and close the
boot separator.
R The boot lid is open. #
Close the boot lid (/ page 80). R
The soft top has been opened and closed
se veral times in a row. The soft top drive has
been switched off automatically and will be
av ailable again af ter appro ximately ten
minutes. #
Repeat the opening or closing procedure
af te r appro ximately ten minu tes.
R You are driving at a speed greaterth an
60 km/h. #
Reduce your speed tobelow 60 km/h.
R The soft top mechanical components or con‐
trol sy stem are defective. #
Consult a qualified specialist workshop. Opening and closing
87