2021 MERCEDES-BENZ CLA COUPE brake sensor

R
If an incor rect transmission position is
engaged.
Drive Away Assist is active under thefo llowing
conditions:
R IfPa rking Assist PARKTRONIC is activated.
R Ifyo u shiT the transmission position tok or
h when theve hicle is stationar y.
R Ifth e de tected obs tacle is less than appr ox.
1.0 m away.
R Ifth e manoeuvring assistance function is acti-
va ted in the multimedia system.
Syst
Syst em limits
em limits
The per form ance of Drive AwayAssist is limited
on inclines.
When driving with a trailer, Drive AwayAssist is
not available.
% Also obser vethe system limits of Parking
Assist PARKTRONIC (/ page 255).
F
F unction of Cr unction of Cr oss
ossTr
Tra1c
a1c Alert
Alert
% Cross Tra1c Ale rtis only available forve hicles
with Blind Spot Assist or Active Blind Spot
Assist. Cross
Tra1c Ale rtcan warndrivers of any cross-
ing tra1c when reve rsing and manoeuvring out of
a parking space. The radar sensors in the bumper
also monitor the area adjacent totheve hicle. If a
critical situation is de tected, theL symbol
appears in the media display and theve hicle can
be braked automaticall y.
If th era dar sensors are obstructed byvehicles or
ot her objects, de tection is not possible.
Cross Tra1c Ale rtis active under thefo llowing
conditions:
R ifth eve hicle is reve rsing at a walking pace.
R manoeuvring assista nce is activated
(/ page 264).
% Also obser vethe inst ructions on Blind Spot
Assist and Active Blind Spot Assist
(/ page 243).
Syst
Syst em limits
em limits
Cross Tra1c Ale rtis not available on inclines.
Cross Tra1c Ale rtis not available when driving
with a trailer. A
A
ctiv
ctiv ating/deactiv
ating/deactiv ating manoeuvr
ating manoeuvr ing assist
ing assistant
ant
Multimedia system:
4 © 5
Settings 5
Assistance
5 Camera & parking #
Activate/deactivate Manoeuvring assistance.
% Manoeuvring assistant must be acti veforthe
function of Drive AwayAssist (/ page 263)
and Cross Tra1c Ale rt (/ page 264). T
T
r
railer hitch
ailer hitch N
No
ot
tes on tr
es on tr ailer oper
ailer oper ation
ation *
N
NOOTE
TE Mercedes-AMG vehicles #
Obser vethe no tes in the Supplement.
Yo u could otherwise failto recognise
dangers. Obser
vethefo llowing no tes on theto ngue weight:
R Do not use a tongue weight that exceeds or
fa lls below the permissible tongue weight
R Use a tongue weight as close as possible to
th e maximum tongue weight 264
264
Driving and parking

*
N
N O
OTE
TE Damage from automatic braking If one of
thefo llowing functions is switched
on, theve hicle brakes automatically in cer tain
situations:
R Active Brake Assist
R Active Distance Assist DISTRONIC
R HOLD function
R Active Parking Assist
To avoid damage totheve hicle, deactivate
th ese systems in thefo llowing or similar situa-
tions: #
during towing #
in a car wash *
N
NO OTE
TE Damage due tounsuitable car wash #
Before driving into a car wash make sure
th at the car wash is suitable forth eve hi-
cle dimensions. #
Ensu rethere is su1cient 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 su1cient. To
avo id damage toyour vehicle when using a car
wa sh, ensu rethefo llowing beforehand:
R Active Distance Assist DISTRONIC is deactiva-
te d.
R The HOLD function is switched o..
R The 360° Camera or there ve rsing camera is
switched o..
R The side windo wsand sliding sunroof are com-
ple tely closed.
R The blo werfo rth eve ntilation and heating is
switched o..
R the windscreen wiper switch is in position g.
R The key is at a minimum dis tance of 3 m away
from theve hicle. Otherwise the boot lid could
open unintentionall y.
R For car washes with a con veyor system: -
neutral iis engaged.
- F
F or v
or v ehicles wit
ehicles wit h aut
h automatic tr
omatic tr ansmission:
ansmission:
If yo u lea vetheve hicle while it is being
wa shed, make sure theke y is located in
th eve hicle. The park position jisother-
wise automatically engaged.
% If, aTer the car wash, youre mo vethewax
from the windscreen and wiper rubbers, this
will pr event smearing and reduce wiper noise.
A
A ut
ut omatic car w
omatic car w ash mode
ash mode
In car wash mode, theve hicle is prepared for driv-
ing into the automatic car wash. Car wash mode
can be activated at a speed of up to20 km/h
Ac tivate (/ page 336) .
The following settings are made when car wash
mode is activated:
R The outside mir rors are folded in.
R Topreve ntthe windscreen washer system
from starting up automaticall y,thera in sensor
is deactivated.
R The rear wind owwiper is deacti vated.
R The windo wsand the sliding sunroof are
closed. Maintenance and care
335
335

R
Furthermore, the use of cer tain tyre types in
cer tain regions and areas of operation can be
high lybene/cial.
R Only use tyres and wheels of the same type
(summer tyres, winter tyres, MOExtended
tyres) and the same make.
R Only /t wheels of the same size on one axle
(leT and right).
It is only permissible to/t a di.e rent wheel
size in theev ent of a 0at tyre in order todrive
to the specialist workshop.
R Do not make any modi/cations tothe brake
system, the wheels or the tyres.
The use of shims or brake dust shields is not
permitted and may in validate theve hicle's
ge neral ope rating permit.
R V
V ehicles wit ehicles wit h a tyr
h a tyre pr
e pressur
essur e monit
e monit or
oring sy
ing sy s-
s-
t
t em:
em: all /t tedwheels must be equipped with
functioning sensors forth e tyre pressure mon-
itoring system.
R Attemp eratures below 7 °C use winter tyres
or all-season tyres mar kedi M+Sfor all
wheels. Wi
nter tyres pr ovide the best possible grip in
wintry road conditions.
R For M+S tyres, only use tyres with the same
tread.
R Obser vethe maximum permissible speed for
th e M+S tyres /t ted.
If th e tyre's maximum speed is below that of
th eve hicle, this must be indicated byan
appropriate label in the driver's /eld of vision.
R Run in new tyres at moderate speeds forthe
/r st 100 km.
R Replace the tyres aTer six years at the latest,
re ga rdless of wear.
R When r
When r eplacing wit
eplacing wit h tyr
h tyres t
es that do no
hat do no t f
t featur
eatur e
e
r
r un-0at
un-0at c
char
har act
acter
eris
istics:
tics: vehicles with
MOExtended tyres are not equipped with a
TIREFIT kit at thefa ctor y.Equip theve hicle
with a TIREFIT kit aTer replacing with tyres
th at do not feature run-0at characteristics,
e.g. winter tyres.
% You can permanently limit the maximum
speed for driving with winter tyres
(/ page 226). Fo
r more information on wheels and tyres, con-
ta ct a quali/ed specialist workshop.
Be sure toalso obser vethefo llowing fur ther rela-
te d subjects:
R Notes on tyre pressure (/ page 366)
R Tyre pressure table (/ page 367)
R Notes on the emer gency spa rewheel
(/ page 380) N No
ot
tes on int
es on int erc
erchanging wheels
hanging wheels &
W
WARNING
ARNING Risk of injury thro ugh di.erent
wheel sizes
Inter changing the front and rear wheels can
se verely impair the driving characteristics.
The disk brakes or wheel suspension compo-
nents may also be damaged. #
Only inter change the front and rear
wheels if the wheels and tyres ha vethe
same dimensions. Wheels and tyres
373
373

Displa
Displa
y messag
y messag es P
es Possible causes/conseq
ossible causes/consequences and uences andM
MSolutions
Solutions
¸
Ã
ç
Ä
temporarily unavailable
Sensors dirty *F
ront and corner radar sensors (hereaTer "sensors") are malfunctioning. Possible causes:
R The senso rsare dirty
R Heavy rain or snow
R Extended country driving without other tra1c, e.g. in the desert
Driving systems and driving saf ety sy stems ma y be malfunctioning or temp orarily una vailable. The brake system, steer-
ing and drive system will continue tofunction normall y. #
Drive on
Once the causes of the problem are no longer present, the driving systems and driving saf ety sy stems will be available
again and the cor responding symbols will be switched o..
If th e display message does not disappear: #
Stop theve hicle in accordance with the tra1c conditions. #
Clean all sensor co vers from outside (/ page 214). #
Restart theve hicle. Displ
aymessages and warning/indicator lamps
449 449

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

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

¸
temp orarily una vailable Sensors
dirty....................................................... 449
Ú Top up AdBlue Emer gency op. in
XXX miles See Owner's Manual.............. 464
+ Top up coolant See Owner ’s
Manual.................................................. 428
¥ Top up washer 0uid...................... .427
u Towing not permitted See Own-
er's Manual ............................................ 416
d Trans. oil overheated Drive on
with care................................................ 433
! Turn on the ignition torelease
th e parking brake ................................... 439
Ú .................................................... 464
d Vehicle is operational Switch o.
ignition before exiting............................. 422
h Warning tyre defect....................... 461
h Wheel sensor(s) missing ................ 460Ú
XX,X l Top up AdBlue Swit chon
ignition, wait 60 sec. or eng. start not
poss...................................................... 465
"Electric" drive prog ram cur rently
una vailable............................................. 418
Ac tive Blind Spot Assist cur rently
una vailable See Owner's Manual ............ 447
Ac tive Blind Spot Assist inoperative........ 447
Ac tive Blind Spot Assist not available
when towing a trailer See Owner's
Manual................................................. .448
Ac tive bonnet malfunction See Own-
er's Manual............................................ 425
Ac tive Brake Assist Functions cur-
re ntly limi ted See Owner's Manual .........455
Ac tive Brake Assist Functions limi ted
See Owner's Manual.............................. 456
Ac tive Distance Assist available again ..... 444
Ac tive Distance Assist cur rently
una vailable See Owner's Manual ............ 443Ac
tive Distance Assist inoperative.......... 443
Ac tive Lane Keeping Assist cur rently
una vailable See Owner's Manual ............ 448
Ac tive Lane Keeping Assist inoperative... 448
Ac tive Steering Assist cur rently
una vailable due tomultiple emer-
ge ncy stops........................................... 445
Ac tive Steering Assist cur rently
una vailable See Owner's Manual ............ 445
Ac tive Steering Assist inoperative...........4 45
Ad aptive Highbeam Assist cur rently
una vailable See Owner's Manual ............ 411
Ad aptive Highbeam Assist inoperative ....4 12
Ad aptive Highbeam Assist Plus cur-
re ntly una vailable See Owner's Manual ... 412
Ad aptive Highbeam Assist Plus inop-
erative.................................................. .412
Anti-theT alarm system Malfunction ....... 427
Apply brake todeselect Park (P) posi-
tion....................................................... .431 Index
495 495

PRE-SAFE inoperati
veSee Owner's
Manual.................................................. 407
Re duce speed........................................ 462
Re duced drive system per form ance
See Owner's Manual.............................. 418
Re versing not poss. Consult workshop ... 432
Risk of vehicle rolling away App ly
parking brake See Owner's Manual ........ 434
Risk of vehicle rolling awayPa rking
brake not applied See Owner's Manual ... 439
Risk of vehicle rolling Driver door
open and transmission not in P .............. 432
Ru n Flat Indica tor inoperative................. 463
Speed limit (winter tyres) XXX km/h .......444
Speed Limit Assist cur rently una vaila-
ble See Owner's Manual........................ 444
Speed Limit Assist inoperative................ 444
Te aching in transmission comple te......... 434 Te
aching in transmission Operate
selector le ver Brake for XX seconds
Risk of vehicle rolling ............................. 433
To shiT out of P or N,depress brake
and start engine.................................... .431
To switch o. the engine, press the
St art/ Stop button for at least 3 sec-
onds or 3 times...................................... 428
Tr a1c Sign Assist cur rently una vaila-
ble See Owner's Manual........................ 446
Tr a1c Sign Assist inoperative................. 446
Tr ansmission Malfunction ....................... 433
Tr ansmission Malfunction Stop............... 432
Tr ansmission Malfunction Visit work-
shop ...................................................... 434
Ty re press. monitor cur rently una vaila-
ble......................................................... 459
Ty re press. monitor inoperative .............. 459
Ty re press. monitor inoperative No
wheel sensors ........................................ 460 Ty
re pressure Check tyres ...................... 462
Ty re(s) ove rheated .................................. 462
Ve hicle not cur rently being charged
Charging station fault............................. 417
Wi per malfunctioning .............................427
Wi thout changing gear, consult work-
shop ............................................. .419, 432
Wi thout starting engine again, consult
wo rkshop ............................................... 419
Dist
Dist ance contr ance contr ol
ol
see Active Distance Assist DISTRONIC
DIS
DIS TR
TR ONIC
ONIC
see Active Distance Assist DISTRONIC
Door
Door Additional door loc k................................. 85
Child saf ety lock (rear door )..................... 79
Locking/unlocking (emer gency key)........ .89
Opening (from inside).............................. .86
Unlo cking (from inside)............................ 86
Door contr
Door contr ol panel
ol panel......................................... 18
Dra
Dra wbar
wbar
see Tow- bar system Index
497
497