2021 MERCEDES-BENZ CLA COUPE brake

Br
Br
ak
ak es
es W
W
ar
ar ning/indicat
ning/indicat or lamp P
or lam pP ossible causes/conseq
ossible causes/consequences and uences andM
MSolutions
Solutions
!
Electric parking brake indi-
cator lamp (red)
!
The electric parking brake
(yellow) indicator lamp *T
he red electric parking brake indicator lamp 0ashes or is lit.
The yellow electric parking brake indicator lamp is also lit in theev ent of a malfunction. #
Notethe messages on the instrument displa y.
J
Brake system warning lamp
(yellow) *T
he yellow brake warning lamp is lit while theve hicle is running. &
W WARNI NG
ARNI NGRisk of an accident due toa brake system malfunction
If th e brake system is malfunctioning, braking characteristics may be impaired. #
Drive on carefull y. #
Have the brake system checked immediately at a quali/ed specialist workshop. #
Adjust your speed and drive on carefull y,leaving a suitable distance totheve hicle in front. #
Ifth e inst rument display sho wsa displ aymessage, obser veit. 478
478
Display message
s andwarning/indicator lamps

W
W
ar
ar ning/indicat
ning/indicat or lampP
or lam pP ossible causes/conseq
ossible causes/consequences and uences andM
MSolutions
Solutions #
Consult a quali/ed specialist workshop.
J
Brake system warning lamp
(red) *T
he red brake warning lamp is lit while theve hicle is running.
Po ssible causes:
R The brake forc e boosting is malfunctioning and the braking characteristics may be a.ected.
R There is insu1cient brake 0uid in the brake 0uid reser voir. #
Notethe messages on the instrument displa y. &
W
W ARNI NG
ARNI NGRisk of accident and injury if brake forc e boosting is malfunctioning
If brake forc e boosting is malfunctioning, increased brake pedal forc e may be necessary for braking. The braking
ch aracteristics may be impaired. The braking dis tance can increase in eme rgency braking situations. #
Stop in a safe location immediatel y.Do not continue driving! #
Consult a quali/ed specialist workshop. &
W
W ARNING
ARNING Risk of an accident due tolow brake 0uid le vel
If th e brake 0uid le vel is too lo w,the braking e.ect and the braking characteristics may be impaired. #
Stop theve hicle as soon as possible, paying attention toroad and tra1c conditions. Do not continue driving. #
Consult a quali/ed specialist workshop. #
Do not top up the brake 0uid. Display messages and
warning/indicator lamps
479
479

Dr
Dr
iving syst
iving syst ems
ems W
W
ar
ar ning/indicat
ning/indicat or lampP
or lam pP ossible causes/conseq
ossible causes/consequences and uences andM
MSolutions
Solutions
L
Wa rning lamp for distance
wa rning function *T
he red distance warning lamp lights up while theve hicle is in motion.
The dis tance totheve hicle in front is too small forth e speed selected.
If th ere is an additional warning tone, you are approaching an obstacle at too high a speed. #
Be prepared tobrake immediatel y. #
Increase the distance.
Fu nction of Active Brake Assist (/ page 235).
Ó Ac tive Brake Assist warning
lamp *T
heActive Brake Assist warning lamp is on.
Due todirty sensors or a malfunction, the system is not available or thera nge of functions is restric ted. #
Notethe messages on the instrument displa y.
ê
Ac tive Brake Assist warning
lamp *T
heActive Brake Assist warning lamp is on.
The system is switched o. or thera nge of functions has been automatically restric ted.
This may be the case if the driver is not wearing a seat belt or ano ther driving system has been activated. #
Obser vethe no tes on Active Brake Assist (/ page 235).480
480
Display messages and
warning/indicator lamps

Dr
Dr
iving safe
iving safe ty syst
ty systems
ems W
W
ar
ar ning/indicat
ning/indicat or lampP
or lam pP ossible causes/conseq
ossible causes/consequences and uences andM
MSolutions
Solutions
!
ABS warning lamp *T
he yellow ABS warning lamp is lit while theve hicle is running.
ABS is malfunctioning.
If an additional warning tone sounds, EBD is malfunctioning.
Other driving systems and driving sa fety systems may also be malfunctioning. #
Notethe messages on the instrument displa y. &
W WARNI NG
ARNI NGThere is a risk of skidding if EBD or ABS is malfunctioning
The wheels may lock during braking.
The steerability and braking characteristics are heavily impaired and the braking distance may increase. In addition,
ot her driving saf ety sy stems are swit ched o.. #
Drive on carefull y. #
Have the brake system checked immediately at a quali/ed specialist workshop. ÷
ESP ®
wa rning lamp 0ashes *
The yellow ESP ®
wa rning lamp 0ashes while theve hicle is in motion.
One or more wheels ha vereached their grip limit (/ page 216). #
Adapt your driving style tosuit thero ad and weather conditions. Displ
aymessages and warning/indicator lamps
481 481

1, 2, 3 ...
1, 2, 3 ...
4MA
4MA TIC
TIC
Fu nction................................................ 181
12 V batt 12 V batt ery ery
see On-board electrical system bat tery (12 V)
12 V soc ket
12 V soc ket
see Soc ket (12 V)
115 V soc ket
115 V soc ket
see Soc ket (115 V)
360° Camera
360° Camera Care...................................................... 339
Fu nction................................................ 251
Opening the camera co ver (r eversing
camera)................................................. 254
Selecting a view.....................................2 54
Switching automatic operation on/o.
(r ev ersing camera)................................. 254 A A
A/C function A/C function Activating/deactivating (MBUX multi-
media system)....................................... 148 Ac
tivating/deactivating (operating
unit)....................................................... 148
ABS (Anti-loc ABS (Anti-loc k Br
k Braking Syst
aking Syst em)
em).................... 215
A
A cceler
cceler ation
ation
see Kickdown
A
A ccident and Br
ccident and Br eakdo
eakdown Manag
wn Manag ement
ement
Mercedes me connect........................... 310
A
A cous
coustic loc tic loc king
kingv
ver
er i/cation
i/cation signal
signal
Ac tivating/deactivating............................ 83
A
A cous
coustic pr tic pr esence indicat
esence indicat or (sound g
or (sound gener-
ener-
at
at or)
or)
No tes..................................................... 156
A
A cous
coustic V tic Vehicle Indication
ehicle Indication
Sound generator.................................... 156
A
A ctiv
ctiv e Blind Spo
e Blind Spo t Assist
t Assist
Brake application................................... 245
Fu nction................................................ 243
System limi tations.................................. 243
Tr ailer operatio n.................................... .245
A
A ctiv ctiv e bonne
e bonne t (pedes
t (pedestr trian pr ot
ian pr otection)
ection)
Operation.............................................. 328
Re setting............................................... 328 A A
ctiv
ctiv e Br
e Br ak
ake Assist
e Assist
Fu nction/no tes...................................... 235
Setting................................................... 239
A
A ctiv
ctiv e Dist
e Dist ance Assis
ance Assis t DIS
t DISTR
TRONIC
ONIC
Ac tive Emer gency Stop Assist................ 234
Calling up a speed................................. 228
Fu nction................................................ 226
Inc reasing/decreasing speed................. 228
Maximum design speed.......................... 172
Ro ute-based speed adap tation............... 231
Selecting............................................... 228
St oring a speed...................................... 228
Switching o./deactivating.................... .228
Switching on/activating......................... 228
System limitations.................................. 226
A A ctiv
ctiv e Emerg
e Emerg encySt
ency Stop Assist
op Assist ...................... 234
A
A ctiv
ctiv e headlam
e headlam ps
ps........................................ .133
A
A ctiv
ctiv e Lane K
e Lane K eeping Assist
eeping Assist
Ac tivating/deactivating.......................... 248
Ac tivating/deactivating thewa rning....... 248
Fu nction................................................ 246
Setting the sensitivity.............................2 48
System limits......................................... 246
Tr ailer operatio n.................................... .246 Index
485
485

A
A
ut
ut omatic engine st
omatic engine st op
op
see ECO start/s top function
A
A ut
ut omatic fr
omatic fr ont passeng
ont passeng er airbag
er airbagshut
shuto.
o.
PA SSENGER AIR BAG indicator la mps...... 57
A
A ut
ut omatic measur
omatic measur es
es aTer
aTer an accident
an accident ............ 61
A
A ut
ut omatic mirr
omatic mirr or f
or folding function
olding function
Ac tivating/deactivating.......................... 146
A
A ut
ut omatic tr
omatic tr ansmission
ansmission
DIRECT SELECT le ver............................. 177
Drive prog rams...................................... 172
DY NAMIC SELECT switch....................... 172
Engaging drive position.......................... 179
Engaging reve rsege ar............................ 178
Kickdown............................................... 180
Manual gear changing........................... .179
Selecting park position........................... 178
St eering wheel gearshiT paddles............ 179
Tr ansmission position displ ay................. 177
Tr ansmission position s........................... 177
A
A ut ut omatic tr
omatic tr ansmission (pr
ansmission (problem) oblem)
see Transmission (problem)
Axle load
Axle load Perm issible............................................ 386
Tr ailer operatio n..................................... 401 B
B
Ball neck
Ball neck Folding out/in........................................ 265
B
B AS (Br
AS (Br ak
ake Assis
e Assist Syst t System)
em)........................... 216
Batt
Batt ery
ery
see High-voltage battery
Batt
Batt er
ery (high-v
y (high-v olt
oltag
age on-boar
e on-boar d electr
d electrical
ical
syst
syst em)
em)
see High-voltage battery
Batt
Batt er
ery (ke
y (ke y)
y)
Re placing................................................. 84
Batt
Batt er
ery (v
y (v ehicle)
ehicle)
Charging (Remo teOnline)..................... .161
No tes..................................................... 350
No tes (starting assis tance and charg-
ing)........................................................ 352
Batt
Batt er
ery oper
y oper ation
ation......................................... 156
Belt
Belt see Seat belt
Bicy
Bicy cle r
cle r ack
ack
Load capacit y........................................ 400
Tr ailer operatio n.................................... .268 Blind Spo
Blind Spo t Assist
t Assist
Ac tivating/deactivating.......................... 246
Fu nction................................................ 243
System limi tations.................................. 243
Blow
Blow er
er
see Clima tecont rol
BlueTEC BlueTEC see AdBlue ®
Bonnet Bonnet Function (active bonnet)......................... 328
Opening/closing.................................... 329
Re setting (active bonn et)........................ 328
Boo Boo t lid
t lid
Closin g.................................................... 91
HANDS-FREE ACCESS............................. 92
Opening...................................................90
Br
Br ak
ak e Assis
e Assist Syst t System
em
see BAS (Brake Assist System)
Br
Br ak
ak e
e0uid
0uid
No tes..................................................... 395
Br
Br ak
ak e f
e f or
orce disce distr tribution
ibution
EBD (Elect ronic Brake forc e Distribu-
tion)....................................................... 218 488
488
Index

Br
Br
ak
ak es
es
ABS (Anti-lo ckBraking System).............. 215
Ac tive Brake Assist................................. 235
Ad aptive brake lights.............................. 220
BAS (Brake Assist System).................... .216
Driving tips............................................ 163
EBD (Electronic Brake forc e Distribu-
tion).......................................................2 18
HOLD function....................................... 219
Limited braking e.ect (salt-treated
ro ads)................................................... .163
Ne w/replaced brake linings/brake
discs...................................................... 162
Po st-collision brak e.................................. 61
Ru nning-in no tes.................................... 162
Br Br ak
ak es
es
see Recuperation
Br Br aking assist aking assist ance
ance
see BAS (Brake Assist System)
Br
Br eakdo
eakdo wn
wn
Assistance overview. ................................ 20
To w- starting........................................... 361
To wing away.......................................... 358
Tr anspo rting theve hicle........................ .359
Wheel chang e........................................ 375 Br
Br ea kdo
eakdo wn
wn
see Flat tyre
Butt
Butt ons
ons
St eering wheel....................................... 273 C
C
Calls
Calls Mercedes me......................................... 305
Camera
Camera
Information............................................ 214
Camera
Camera see 360° Camera
see Dashcam
see Reversing camera
Car key
Car key
see Key
Car w Car w ash
ash
see Care
Car w
Car w ash (car
ash (car e)
e)............................................ 334
Car
Car -t
-to-X
o-X -Communication
-Communication
Displaying hazard warnings.................... 299
Care
Care 360° camera......................................... 339 Air-water duct........................................ 334
Au
tomatic car wash.............................. .334
Carpet................................................... 340
Decorative foil........................................ 338
Display................................................... 340
Exterior lighting...................................... 339
Head-up display..................................... 340
High-pressure cleaner............................3 36
Pa int...................................................... 337
Plastic trim............................................3 40
Re alwo od/trim elements..................... .340
Re versing camera..................................3 39
Ro of lining............................................. 340
Seat belt................................................ 340
Seat co ver............................................. 340
Sensors.................................................3 39
St eering wheel....................................... 340
Ta ilpipes................................................ 339
Tr ailer hitc h............................................ 339
Ve hicle soc ketfo rth e high-voltage
battery................................................... 339
Wa shing byhand.................................... 337
Wheels/rims.......................................... 339
Wi ndo ws................................................ 339
Wi per blades.......................................... 339 Index
489 489

Displa
Displa
y messag
y messag es
es
ç - - - km/h..................................... 442
È - - - km/h..................................... 442
h - - - km/h..................................... 441
# 12 V battery See Owner's Man-
ual......................................................... 457
ò Acoustic presence indicator
inoperative............................................ .416
: Active Light System inoperative..... 410
¯ AdBlue system fault Emer. op.:
max. XXX km/h Start not poss. in
XXX km.................................................. 466
¯ AdBlue system fault Emer gency
op. in XXX miles See Owner's Manual.... 465
¯ AdBlue system fault Engine
start not possible................................... 466
¯ AdBlue system fault See Own-
er's Manual............................................ 465
5 Add 1 litre engine oil when next
re fuelling ............................................... 467 é
ATTENTION ASSIST inoperati ve..... 441
é ATTENTION ASSIS T:Take a
break!.................................................... 441
: Automatic driving lights inoper-
ative...................................................... 410
Û Battery overheated Stop, every-
body out! Outdoors if possible ................ 418
û Before starting the engine, turn
th e steering wheel.................................. 425
J Brake immediately ........................ 439
Á Change key batteries .................... 407
è Charger cable connected .............. 416
J Check brake 0uid le vel.................. 440
ï Check trailer hitch lock (white
display message) .................................... 422
h Check tyre(s) ................................ 460
! Clean the fuel /lter....................... 430
ÿ Coolant Stop vehicle Switch
engine o............................................... 429 !
currently una vailable See Own-
er's Manual............................................4 52
÷ currently una vailable See Own-
er's Manual............................................4 53
5 Engine oil le vel cannot be meas-
ured....................................................... 468
5 Engine oil le velRe duce oil le vel..... 467
5 Engine oil le velSt op vehicle
Switch engine o.................................... 467
5 Engine oil pressure Stop Switch
o. engine.............................................. 468
ä Fault Drive at max. 80 km/h ......... 451
6 Front leT malfunction Consult
wo rkshop (e xample)...............................4 04
& inoperative Battery low................. 413
& inoperative Char geHV battery...... 414
& inoperati veHigh-voltage battery
ch arging inco mplete ............................... 414
& inoperative Refuel vehicle............. .414
& inoperative See Owner's Man........ 413 Index
493 493