brakes MERCEDES-BENZ C-CLASS COUPE 2021 Owners Manual

1
L Distance warning →
496
2 Ð Powe rst eering →
490
3 #! Turn signal lights →
12 3
4 ; Engine diagnostics →
491
5 % Diesel engine: preglow
6 ! Electric pa rking brake (red) →
494
7 J Brakes (red) →
494
8 ÿ Coolant temp erature →
491
9 Coolant temp erature display →
234
A J Brakes (yellow) →
494
B ! Electric pa rking brake (yellow) →
494
C ! ABS →
497 D
6 Restra int sy stem →
489
E ü Seat belt →
489
F K High beam →
12 3
G L Low beam →
121
H 8 Reser vefuel with fuel filler flap location
indicator →
491
I Fuel le vel →
234
J T Standing lights →
121
K R Rear fog light →
12 2
L h Tyre pressure monitoring sy stem →
500
M å ESP®
OFF →
497
N ÷ ESP®
→
497 At
aglance – Indicator and warning lamps (s tanda rd) 11

1
#! Turn signal lights →
12 3
2 R Rear fog light →
12 2
3 K High beam →
12 3
L Low beam →
121
T Standing lights →
121
4 ÿ Coolant temp erature →
491
5 Coolant temp erature display →
234
6 L Distance warning →
496
7 ü Seat belt →
489
8 h Tyre pressure monitoring sy stem →
500
9 Ù Powe rst eering →
490
A ! Electric pa rking brake (yellow) →
494
B ! Electric parking brake (red) →
494
C 6 Restra int sy stem →
489 D
ï Trailer hit ch →
490
E J Brakes (red) →
494
F 8 Reser vefuel with fuel filler flap location
indicator →
491
G Fuel le vel →
234
H ä Suspension →
496
I J Brakes (yell ow) →
494
J # Electrical fault →
491
K ; Engine diagnostics →
491
L % Diesel engine: preglow
M ! ABS →
497
N å ESP®
OFF →
497
÷ ESP®
→
497 At
aglance – Indicator and warning lamps (widesc reen cockpit) 13

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

Note
s on driving through water on the road
sur face
Wa ter which has entered into theve hicle can
damage the engine, electrics and transmission.
Wa ter can also enter the air intake of the engine
and cause engine damage.
Obser vethefo llowing if you must drive thro ugh
wate r:
R The wate r,when calm, may only reach the
lo we r edge of theve hicle body.
R Drive at a maximum speed of 10km/h;
wate r can otherwise enter theve hicle interior
or engine compartment.
R Vehicles tr avelling in front, or oncoming vehi‐
cles, can create waves which may exceed the
maximum permissible dep thofthewate r.
The braking ef fect of the brakes is reduced af ter
fo rd ing. Brake carefully while paying attention to
th e tra ffic conditions until braking po wer has
been fully restored. ECO
start/s top function Ope
ration of the ECO start/s top function
% Depending on the engine, the ECO start/
st op function is not available in all drive pro‐
grams. Obse rveth est atus display in the
multifunction display forth is.
The engine is switched off automatically in the
fo llowing situations if all vehicle conditions for
an automatic engine stop are me t:
R You brake theve hicle toast andstill in trans‐
mission position hori.
R Vehicles with a 48 V on-board electrical
sy stem: You depress the brake pedal when
tra velling at a low speed.
If th e sy stem has de tected one of thefo llowing
situations, the engine will not stop:
R Youstop at a stop sign and there is no vehi‐
cle in front of you.
R The vehicle that stopped in front of you
st arts up again.
R You manoeuv re, turn thesteering wheel
sharply or engage reve rsege ar. %
Ifth e sy stem de tects an intelli gent stop
inhibitor, forex ample, a stop sign, the engine
will not stop.
If yo u activate the HOLD function or engage
th e park position j,the engine can be
switched off in spite of an intelligent stop
inhibitor.
The engine is restar ted automatically if:
R You en gage transmission position hork.
R You depress the accelerator pedal.
R An automatic engine start is requiredbythe
ve hicle.
R Youre lease the brake pedal.
R Vehicles with a 48 V on-board electrical
sy stem:
- Youre lease the brake pedal on a downhill
gradient and theve hicle does not roll.
- The vehicle rolls on a downhill gradient
and does not automatically enter glide
mode at 20 km/h. 15 2
Driving and pa rking

Fu
nctions of ABS (Anti-lock Braking Sy stem) ABS
regulates the brake pressure in critical driv‐
ing situations:
R During braking, e.g. at maximum full-s top
braking or insuf ficient tyre traction, the
wheels are pr evented from lo cking.
R Vehicle steerability while braking is ensured.
If ABS inter venes when braking, you will feel a
pulsing in the brake pedal. The pulsating brake
pedal can be an indication of hazardous road
conditions and can ser veas a reminder totake
ex tra care while driving.
Sy stem limits
R ABS is active from speeds of appr ox.
5 km/h.
R ABS may be impai red or may not function if a
malfunction has occur red and theye l‐
low ! ABSwarning lamp lights up contin‐
uously in the instrument clus ter af terthe
engine is star ted. Fu
nction of BAS &
WARNING Risk of an accident caused by
a malfunction in BAS (Brake Assi stSys‐
te m)
If BA S is malfunctioning, the braking dis tance
in an emergency braking situation is
increased. #
Dep ress the brake pedal with full force
in emer gency braking situations. ABS
pr eve nts the wheels from locking. The Brake Assist Sy
stem (BAS) supports your
eme rgency braking situation with additional
brake forc e.
If yo u depress the brake pedal quickl y,BA S is
acti vated:
R BAS au tomatical lyboosts the brake pres‐
sure.
R BAS can sho rten the braking dis tance.
R ABS pr events the wheels from locking.
The brakes will function as usual once you
re lease the brake pedal. BAS is deactivated. Fu
nction of ESP ®
(Electronic Stability Pro‐
gr am) &
WARNING Risk of skidding if ESP ®
is
deactivated
If yo u deactivate ESP ®
, ESP ®
cannot car ry
out vehicle stabilisation. #
ESP ®
should on lybe deactivated in the
fo llowing situations. *
NO
TEMercedes-AMG vehicles #
Obser vethe no tes in the Supplement.
Yo u could otherwise failto recognise
dangers. ESP
®
can moni tor and impr ovedriving stability
and traction in thefo llowing situations, within
ph ysical limits:
R When pulling away on wet or slippe rycar ria‐
ge wa ys.
R When braking. Driving and parking
17 7

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 175).
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. Driving and parking
18 3

R
On slippery roads. Accelerating can cause
th e drive wheels tolose traction and the
ve hicle could then skid.
R Ifyo u are driving when visibility is poor.
Fu nction of the limiter
The limiter restricts the speed of theve hicle. To
re duce the speed tothe set speed, the limiter
applies the brakes automaticall y.
Yo u can limit the speed as follo ws:
R Variable: for a short-term speed restriction,
e.g. in built-up areas
R Perm anen t:for a longer-term speed restric‐
tion, e.g. in winter tyre mode
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. You can also per form settings
while theve hicle is stationary if theve hicle has
been star ted.
Obser vethe no tes on driving sy stems and your
re sponsibility; you may otherwise failto recog‐
nise dangers (/ page 175).
Me rcedes‑AMG vehicles: the limiter is available
up toa maximum speed of 250 km/h. Displ
ays on the multifunction display
R È (gre y): variable limiter is selec ted but
not yet acti vated.
R È (flashes gr ey):va riable limiter is temp o‐
ra rily passive.
R È (green): variable limiter is activated.
A stored speed appears along with theÈ dis‐
pla y.The segments in the speedome ter light up,
up tothe cur rently stored speed.
If yo u depress the accelera tor pedal be yond the
pressure point (kickdown), theva riable limiter
swit ches topassive mode. The Limiter passive
message appears in the multifunctional display
and theÈ display flashes.
The variable limiter is reactivated in thefo llowing
situations:
R Ifth eve hicle speed drops below thestored
speed.
R Ifth estored speed is called up.
R Ifyo ustore a new speed. Operating cruise control or
theva riable lim‐
iter &
WARNING Risk of accident due tostored
speed
If yo u call up thestored speed and this is
lo we rth an your cur rent speed, theve hicle
decelerates. #
Take into account the tra ffic situation
before calling up thestored speed. Re
quirements:
Cruise control
R Cruise control is selected.
R ESP ®
must be activated, but not inter vening.
R The vehicle speed is at least 20 km/h.
R The transmission is in position h.
Va riable limiter
R The variable limiter is selec ted. 184
Driving and pa rking

Deactivating cruise cont
rol or theva riable
limi ter #
Select Owith th e left rock er switch.
% Ifyo u brake, deactivate ESP ®
or if ESP ®
inter venes, cruise control is deacti vated. The
va riable limiter is not deactivated.
Information on the permanent limiter
If th eve hicle should ne verexc eed a specific
speed (e.g. for driving in winter tyre mode), you
can set this speed with the permanent limiter.
Yo u do this by limiting the speed between
16 0 km/h and 240 km/h in the multimedia sys‐
te m (/ page186).
Shortly before the set speed is reached, it
appears in the multifunction displa y.When you
confirm the message, display messages no lon‐
ge r appear until you swit choff theve hicle. The
speed will only be displa yed again once theve hi‐
cle has been restar ted or if the set speed is
ch anged.
The permanent limiter does not swit chtopas‐
sive mode even du ring kickdown and the driven
speed remains below the set speed. Setting
the limit speed for winter tyres
Multimedia sy stem:
4 Vehicle 5
î Vehicle settings
5 Winter tyres limit #
Select a speed or deactivate the function. Ac
tive Di stance Assist DISTRO NIC Fu
nction of Active Di stance Assist
DISTRO NIC
Ac tive Dis tance Assi stDISTRONIC maintains the
set speed on free-flowing roads. If vehicles in
front are de tected, the set dis tance is main‐
ta ined, if necessar y,until theve hicle comes to a
halt. The vehicle accelerates or brakes depend‐
ing on the dis tance totheve hicle in front and
th e set speed. The speed and dis tance tothe
ve hicle in front are set and sa ved using the
st eering wheel.
Av ailable speed range:
R Vehicles without Driving Assistance Pack‐
age: 20 km/h - 200 km/h
R Vehicles with Driving Assistance Pack‐
age: 20 km/h - 210 km/h Other
features of Active Dis tance Assi st
DISTRONIC:
R Adjusts the driving style depending on the
selected drive program (fuel-saving, comfort‐
able or dynamic)
R Initiates acceleration tothestored speed if
th e turn signal indicator is switched on to
ch ange totheove rtaking lane
R Vehicles with Driving Assistance Pack‐
age:
- Reacts tostationary vehicles de tected in
urban speed ranges (e xcept bicycles and
mo torcyc les)
- Take s one-sided overtaking restrictions
into account on mo torw ays or on multi-
lane roads with separate car riag ew ays
(countr y-dependent)
Ve hicles with Driving Assistance Package
and Park ingPackage: ifth eve hicle has been
braked toast andstill on multi-lane, separate
car riag ew aysby Active Dis tance Assi st
DISTRONIC, it can au tomatically follow theve hi‐
cle in front when driving off again within 30 sec‐ 18 6
Driving and pa rking

Display on
the speedome ter
The stored speed is highlighted on the speedom‐
et er. If the speed of theve hicle in front or the
speed adjustment forth ero ute event ahead is
less than thestored speed, the segments in the
speedome ter light up. The multifunction display
sho ws th e deactivation of Active Dis tance Assi st
DISTRONIC, as well as alterations tothe speed
due tomanual or auto matic adoption of the max‐
imum permissible speed.
Sy stem limits
The sy stem may be impaired or may not function
in thefo llowing situations, forex ample:
R In sn ow,ra in, fog, heavy spr ay, if there is
gl are, in direct sunlight or in greatlyvarying
light conditions.
R The windsc reen in the area of the camera is
dirty, mis ted up, damaged or co vered.
R Ifth era dar sensors are dirty or co vered.
R In multi- stor ey car pa rks or on roads with
st eep uphill or downhill gradients.
R Ifth ere are nar rowvehicles in front, such as
bicycles or mo torcyc les. In addition, on slippery
roads, braking or accel‐
erating can cause one or se veral wheels tolose
traction and theve hicle could then skid.
Do not use Active Dis tance Assi stDISTRONIC in
th ese situations. &
WARNING Risk of accident from acceler‐
ation or braking byActive Dis tance
Assi stDISTRONIC
Ac tive Dis tance Assi stDISTRONIC may accel‐
erate or brake in thefo llowing cases, for
ex ample:
R Ifth eve hicle pulls away using Active Dis‐
ta nce Assi stDISTRONIC.
R Ifth estored speed is called up and is
considerably faster or slo werth an the
cur rently driven speed.
R IfAc tive Dis tance Assi stDISTRONIC no
longer de tects a vehicle in front or does
not react toreleva nt objects. #
Alw ays carefully obser vethe traf fic con‐
ditions and be ready tobrake at all
times. #
Take into account the tra ffic situation
before calling up thestored speed. &
WARNING Risk of accident due toinsuf‐
fi cient decele ration byActive Dis tance
Assi stDISTRONIC
Ac tive Dis tance Assi stDISTRONIC brakes
yo ur vehicle with up to50% of the possible
deceleration. If this decele ration is not su ffi‐
cient, Active Dis tance Assi stDISTRONIC
alerts you with a visual and acoustic warning. #
Adjust your speed and main tain a suita‐
ble dis tance from theve hicle in front. #
Brake theve hicle yourself and/or take
ev asive action. 18 8
Driving and pa rking

*
NO
TEDama gefrom auto matic braking If one of
thefo llowing functions is switched
on, theve hicle brakes automatically in cer‐
ta in situations:
R Active Brake Assi st
R Active Dis tance Assi stDISTRONIC
R HOLD function
R Active Parking Assist
To avo id damage totheve hicle, deactivate
th ese sy stems in thefo llowing or similar sit‐
uations: #
during towing #
in a car wash *
NO
TEDama gedue tounsuitable car
wa sh #
Before driving into a car wash make
sure that the car wash is suitable for
th eve hicle dimensions. #
Ensure there is suf ficient ground clear‐
ance between the underbody and the
guide rails of the car wash. #
Ensure that the clearance width of the
car wash, in particular the width of the
guide rails, is suf ficient. To
avo id damage to yourvehicle when using a
car wash, ensure thefo llowing beforehand:
R Active Dis tance Assi stDISTRONIC is deacti‐
va ted.
R the HOLD function is switched off.
R the 360° Camera or there ve rsing camera is
switched off.
R the side windo wsand sliding sun roof are
comple tely closed.
R the blo werfo rth eve ntilation/heating is
switched off.
R the windscreen wiper switch is in position
g.
R theke y is at a minimum dis tance of 3 m
aw ay from theve hicle. Otherwise the boot lid
could open unintentionally. R
for car washes with a con veyo r sy stem:
- neutral iis engaged.
- Ifyo uwo uld like tolea vetheve hicle while
it is being washed, make sure theke y is
located in theve hicle. The park position
j isotherwise automatically engaged.
% If, af terth e car wash, youre mo vethewax
from the windscreen and wiper rubbers, this
will pr event smearing and reduce wiper
noise. Information on using a high-p
ressure cleaner &
WARNING Risk of an accident when
using high-pressure cleane rswith round-
spray nozzles
The wate r jet can cause extern ally invisible
damage.
Components damaged in this wa y may unex‐
pec tedly fail. #
Do not use a high-pressure cleaner with
round-spr aynozzles. 37 0
Maintenance and care