MERCEDES-BENZ A-CLASS SALOON 2021 Owners Manual
Manufacturer: MERCEDES-BENZ, Model Year: 2021, Model line: A-CLASS SALOON, Model: MERCEDES-BENZ A-CLASS SALOON 2021Pages: 525, PDF Size: 9.03 MB
Page 481 of 525
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
WARNI 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
WARNING
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. 478
478
Display messages and
warning/indicator lamps
Page 482 of 525
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). Display messages and
warning/indicator lamps
479
479
Page 483 of 525
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. 480 480
Displ
aymessages and warning/indicator lamps
Page 484 of 525
W
W
ar
ar ning/indicat
ning/indicat or lampP
or lam pP ossible causes/conseq
ossible causes/consequences and uences andM
MSolutions
Solutions
÷
ESP ®
wa rning lamp lights up *
The yellow ESP ®
wa rning lamp is lit while theve hicle is running.
ESP ®
is malfunctioning.
Other driving systems and driving sa fety systems (e.g. BAS) may also be malfunctioning. #
Notethe messages on the instrument displa y. &
W
W ARNI NG
ARNI NGRisk of skidding if ESP ®
is malfunctioning
If ESP ®
is malfunctioning, ESP ®
cannot carr y outvehicle stabilisation. In addition, other driving saf ety sy stems are
swit ched o.. #
Drive on carefull y. #
Have ESP ®
ch ecked at a quali/ed specialist workshop. å
ESP ®
OFF warning lamp *
The yellow ESP ®
OFF warning lamp is lit while theve hicle is running.
ESP ®
is deactivated.
Other driving systems and driving sa fety systems may also be inoperative. &
W
WARNING
ARNING Risk of skidding when driving with ESP ®
deactivated
ESP ®
does not act tostabilise theve hicle. The availability of fu rther driving saf ety sy stems is also limi ted. #
Drive on carefull y. #
Deactivate ESP ®
only for as long as the situation requ ires. Display message
s andwarning/indicator lamps
481
481
Page 485 of 525
W
W
ar
ar ning/indicat
ning/indicat or lampP
or lam pP ossible causes/conseq
ossible causes/consequences and uences andM
MSolutions
Solutions
If ESP ®
cannot be activated, ESP ®
is malfunctioning. #
Have ESP ®
ch ecked immediately at a quali/ed specialist workshop. #
Obser vethe no tes on deacti vating ESP ®
(/ page 216). T
T
yr
yr e pr
e pr essur
essur e monit
e monit or
or W
W
ar
ar ning/indicat
ning/indicat or lampP
or lam pP ossible causes/conseq
ossible causes/consequences and uences andM
MSolutions
Solutions
h
Ty re pressure monitoring
system warning lamp 0ashes *The
yellow tyre pressure monitor warning lamp (pressure loss/malfunction) 0ashes for appr oximately one minute and
th en remains lit.
The tyre pressure monitor is malfunctioning. &
W
WARNING
ARNING There is a risk of an accident if the tyre pressure monitoring system is malfunctioning
The tyre pressure monitoring system cannot issue a warning if there is pressure loss in one or more of the tyres.
Ty res with insu1cient tyre pressure may impair the driving characteristics as well as steering and braking. #
Have the tyre pressure monitoring system checked at a quali/ed specialist workshop. 482
482
Displ
aymessages and warning/indicator lamps
Page 486 of 525
W
W
ar
ar ning/indicat
ning/indicat or lampP
or lam pP ossible causes/conseq
ossible causes/consequences and uences andM
MSolutions
Solutions
h
Ty re pressure monitoring
system warning lamp lights
up *T
he yellow tyre pressure monitoring system warning lamp (pressure loss/malfunction) is lit.
The tyre pressure monitoring system has de tected tyre pressure loss in at least one of the tyres. &
W
WARNING
ARNING Risk of an accident due toinsu1cient tyre pressure
R The tyres can burst.
R The tyres can wearexcessively and/or une venly.
R The driving characteristics as well as the steering and braking may be greatly impaired.
Yo u could then lose control of theve hicle. #
Obser vethere commended tyre pressures. #
Adjust the tyre pressure if necessar y. #
Stop theve hicle in accordance with the tra1c conditions. #
Check the tyre pressure and the tyres. Display messages and
warning/indicator lamps
483
483
Page 487 of 525
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...................................................... 336
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.............................................. 325
Re setting............................................... 325 A
A ctiv ctiv e Br
e Br ak
ak e 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.................................... .246 484
484
Index
Page 488 of 525
A
A
ctiv
ctiv e P
e P ar
ar king Assist
king Assist
Exiting a parking space.......................... 262
Fu nction................................................ 259
Pa rking.................................................. 260
System limitations..................................2 59
A
A ctiv
ctiv e Ser
e Ser vice Sy
vice Sy st
stem PL
em PL US
US
see ASS YST PLUS
A A ctiv ctiv e Speed Limit Assist
e Speed Limit Assist
Display................................................... 230
Fu nction................................................ 230
A
A ctiv
ctiv eSt
e St eer
eer ing Assist
ing Assist
Ac tivating/deactivating.......................... 234
Ac tive Emer gency Stop Assist................ 234
Fu nction................................................ 232
System limits......................................... 232
A
A dap
dap tiv
tive br
e br ak
ake lights
e lights .................................... 220
A
A dap
dap tiv
tive cr
e cr uise contr
uise contr ol
ol
see Active Distance Assist DISTRONIC
A
A dap
dap tiv
tive Highbeam Assist
e Highbeam Assist
Ac tivating/deactivating.......................... 136
Fu nction................................................ 135
A
A dap
dap tiv
tive Highbeam Assis
e Highbeam Assist Plus t Plus
Fu nction................................................ 136
Switching on/o..................................... 137 A
A dBlue
dBlue ®
®
Ad ditives................................................ 390
Capacity................................................ 391
No tes..................................................... 186
Purit y.................................................... .390
To pping up............................................ .186
A
A dditional door lock
dditional door lock ....................................... 86
A A dditiv
dditiv es
es
Ad Blue ®
................................................ .390
Engine oil............................................... 391
Fu el....................................................... 388
A A dditiv dditiv es (A
es (AdBlue
dBlue ®
®
)
)
see AdBlue ®
A
A dditiv
dditiv es (engine oil)
es (engine oil)
see Additives
A
A dditiv
dditiv es (fuel)
es (fuel)
see Fuel
A
A djus
djus ting t
ting t he headlam
he headlam p r
p range
ange ...................... 131
ATer
ATer -sales
-sales ser
service
vice
see ASS YST PLUS
Air conditioning menu
Air conditioning menu Calling up.............................................. 148 Air dis
Air distr
tribution
ibution
Setting................................................... 147
Setting (MBUX multimedia system)......... 149
Air inlet Air inlet see Air-water duct
Air pr
Air pr essure
essure
see Tyre pressure
Air v
Air v ents
ents
Ad justing (front)..................................... 154
Ad justing (rear)...................................... 155
Air v
Air v ents
ents
see Air vents
Air
Air -conditioning syst
-conditioning syst em
em
see Climate cont rol
Air
Air -r
-recir
ecir culation mode (wit
culation mode (wit h
h/ne
/ne
par
par ticle
ticle pr
pre/lt
e/lt er)
er).......................................... 149
Air
Air -w
-wat
ater duct
er duct
Ke eping free.......................................... 331
Airbag
Airbag Activation................................................ 47
Fr ont airbag (driver, front passenger)........ 52
Installation locations................................ 52
Knee airbag............................................. 52 Index
485
485
Page 489 of 525
Overview.................................................
.52
PA SSENGER AIR BAG indicator la mps...... 57
Pr otection................................................ 53
Re duced pr otection.................................. 55
Side airbag.............................................. 52
Wi ndow airbag......................................... 52
Air0 ow
Air0ow
Setting................................................... 147
Alar Alar m syst m syst em
em
see ATA (anti-theT alarm system)
All-wheel dr
All-wheel dr ive
ive
see 4M ATIC
Ambient lighting
Ambient lighting Setting (MBUX multimedia system)........ .138
Andr
Andr oid A
oid A uto
uto
see Smartphone integ ration
Animals
Animals Pets in theve hicle.................................... 80
Anti-loc
Anti-loc k br
k braking syst
aking syst em
em
see ABS (Anti-lock Braking System)
Anti-skid c
Anti-skid c hains
hains
see Sn owchains Anti-t
Anti-theT
heTprot
pr otection
ection
Ad ditional door loc k................................. 86
Immobiliser............................................ 101
Anti-t
Anti-theT heTprot
pr otection
ection
see ATA (anti-theT alarm system)
Anticipat
Anticipat or
ory occupant pr ot
y occupant pr otection
ection
see PRE-SAFE ®
(anticipatory occu-
pant pr otection)
see PRE-SAFE ®
PLUS (anticipatory
occupant pr otection plus)
Apple CarPlay
Apple CarPlay ®
®
see Smartphone integ ration
Assist Assist ance syst ance syst ems
ems
see Driving saf ety sy stem
ASS YS
ASS YST PL
T PL US
US
Battery disconnection period s................ 325
Displaying the service due dat e.............. 324
Fu nction/no tes...................................... 324
Re gular maintenance work..................... 324
Special service requ irements................. 324
AT
ATA A(anti-t
(anti-theT heTalar
alarm syst
m syst em)
em)
Deactivating the alarm........................... 102
Fu nction................................................ 101
Interior pr otection function.....................1 03Priming/deactivating interior pr
otec-
tion........................................................ 103
Priming/deactivating tow- awa y pro-
te ction................................................... 102
To w- awa y protection function................. 102
A
A TTENTION ASSIST TTENTION ASSIST
Function................................................ 221
Setting.................................................. .223
System limitations.................................. 221
A A tt tt ention assist
ention assist ant
ant
see ATTENTION ASSIST
A
A ut
ut hor
hor ised w
ised w ork
orkshop
shop
see Quali/ed specialist workshop
A
A ut
ut omatic car w
omatic car w ash mode
ash mode
Ac tivating............................................... 333
A
A ut
ut omatic co-dr
omatic co-dr iv
iver airbag
er airbag shut
shuto.
o.
Fu nction of co-driver airbag shuto........... 56
A
A ut
ut omatic dist
omatic dist ance contr
ance control
ol
see Active Distance Assist DISTRONIC
A
A ut
ut omatic dr
omatic dr iving lights
iving lights ................................ 131
A
A ut
ut omatic engine st
omatic engine st art
art
see ECO start/stop function 486
486
Index
Page 490 of 525
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
esaTer
aTer an accident
an accident ............ 60
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............................................ 384
Tr ailer operatio n..................................... 399 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..................................................... 349
No tes (starting assis tance and charg-
ing)........................................................ 350
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........................................ 399
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)......................... 325
Opening/closing.................................... 326
Re setting (active bonn et)........................ 325
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..................................................... 393
Br
Br ak
ak e f
e f or
orce disce distr tribution
ibution
EBD (Elect ronic Brake forc e Distribu-
tion)....................................................... 218 Index
487
487