start stop button MERCEDES-BENZ A-CLASS HATCHBACK 2021 Owners Manual

#
When closing thero ller sunblind, make sure
th at no body parts are in thera nge of mo ve-
ment. &
W
WARNING
ARNING Risk of becoming trapped
despite reve rsing function
In particular, there ve rsing function does not
re act tosoT, light and thin objects, e.g. /n-
ge rs. #
When closing thero ller sunblind, make
sure that no body parts are in thera nge
of mo vement. #
Release the button immediately if some-
body becomes trapped.
or #
Brie0y press the button in any direction
during the automatic closing process.
The closing process will be stopped. A
A
ut
ut omatic functions of t
omatic functions of t he sliding sunr
he sliding sunroof
oof%
The term "sliding sunroof" also refers to the
panorama sliding sunroof. The sliding sunroof will be closed automatically
when theve hicle has been switched o. in thefo l-
lowing situations:
R if it starts torain
Ra in is de tected byara in sensor on the wind-
screen.
R inextreme temp eratures
R aTer a cer tain time (depending on the on-
board electrical system voltage)
R ifth ere is a malfunction in the po wer supply
The sliding sunroof will rise at there ar in order to
continue ventilating theve hicle interior.
If th e sliding sunroof is obstructed during an auto-
matic closing procedure, thero of will be opened
again slightl y.The automatic function forth e slid-
ing sunroof and the side windo wswill then be
deactivated.
R
R ain-closing f ain-closing f eatur
eature when dr
e when dr iving
iving
V
V ehicles wit
ehicles wit h a panor
h a panorama sliding sunr
ama sliding sunr oof:
oof:if it
starts torain, thera ised sliding sunroof will auto-
matically be lo wered while theve hicle is in
motion. A
A
ut
ut omatic low
omatic low er
ering function
ing function
V
V ehicles wit
ehicles wit h a panor
h a panorama sliding sunr
ama sliding sunr oof:
oof:ifthe
sliding sunroof is raised at there ar, it will auto-
matically be lo wered slightly at higher speeds. At
low speeds, it will be raised again automaticall y. &
W
W ARNI NG
ARNI NGRisk of becoming trapped by
automatic lo wering of the sliding sunroof
At higher speeds, thera ised sliding sunroof
will automatically be lo wered slightly at the
re ar. #
Make sure that nobody reaches into the
sliding sunroof's range of mo vement
while theve hicle is in motion. #
If somebody becomes trapped, brie0y
push the sliding sunroof button forw ards
or backwards. %
By pushing or pulling the3 button, you
can inter rupt the automatic functions "Rain
closing function when driving" and "Automatic
lo we ring". 98 98
Opening and closing

Pr
Pr
iming/deactiv
iming/deactiv atingtow
ating tow-awa
-a wa y pr ot
y pr otection
ection Multimedia system:
4 © 5
Settings 5
Quick access #
Prime or deactivate Tow-away protection.
To w- awa y protection is primed again in thefo llo w-
ing cases:
R The vehicle is unloc ked again.
R A door is opened.
R The vehicle is loc ked again.
% Ifqu ick access is una vailable, select theVehi-
cle submenu in theSettings main menu to
prime or deactivate tow- awa y protection. F
F
unction of int
unction of int er
erior pr ot
ior pr otection
ection When interior pr
otection is primed, a visual and
audible alarm is triggered if mo vement is de tected
in theve hicle interior.
Interior pr otection is primed automatically aTer
appr oximately ten seconds:
R aTer locking theve hicle with thekey
R aTer locking theve hicle using KEYLESS-GO Interior pr
otection is only primed when thefo llo w-
ing components are closed:
R doors
R tailgate
Interior pr otection is automatically deactivated:
R aTer pressing theÜ button on thekey
R aTer pressing the start/s top button with the
ke y in the st owage compartment
(/ page 166)
R aTer unlocking theve hicle using KEYLESS-GO
The following situations can lead toafa lse alarm:
R when there are moving objects such as mas-
cots in theve hicle interior
R when a side wind owis open
R when a panoramic sliding sunroof is open Pr
Pr
iming/deactiv
iming/deactiv ating int
ating int er
erior pr ot
ior pr otection
ection Multimedia system:
4 © 5
Settings 5
Quick access #
Prime or deactivate Interior motion sensor .Interior pr
otection is primed again in thefo llowing
cases:
R The vehicle is unloc ked again.
R A door is opened.
R The vehicle is loc ked again.
% Ifqu ick access is una vailable, select theVehi-
cle menu under Settingstoprime or deacti-
va te interior pr otection. Opening and closing
101 101

%
Ifth e system de tects an intelligent stop inhibi-
to r,fo rex 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 o. in spite of an intelligent stop
inhibitor.
% In transmission position k,the engine is not
switched o. automatically even when the
HOLD function is switched on.
The engine restarts au tomatically in thefo llowing
cases:
R V Vehicles wit
ehicles wit h manual tr
h manual tr ansmission:
ansmission: Yo u
depress the clutch pedal.
R V
Vehicles wit
ehicles wit h aut
h automatic tr
omatic tr ansmission:
ansmission: Yo u
shiT into transmission position hork.
R You depress the accelerator pedal.
R An automatic vehicle engine start is requ ired.
St atus displ ayinthe inst rument displa y:
R The symbol è(gre en) appears when the
ve hicle is at a standstill: The engine was
switched o. bythe ECO start/s top function. R
The symbol ç(yellow) appears when the
ve hicle is at a standstill: Not all vehicle condi-
tions for an engine stop ha vebeen met.
R Neither the symbol ènorç appears
when theve hicle is at a standstill: An intelli-
ge nt stop inhibitor was de tected, e.g. a stop
sign.
R The symbol sappears: The ECO start/
stop function is deactivated or there is a mal-
function.
If th e engine was switched o. bythe ECO start/
stop function and you lea vetheve hicle, a warning
to ne sounds and the engine is not restar ted. In
addition, the display message Vehicle is opera-
tional Switch off ignition before exiting appears
in the inst rument displa y.Ifyo u do not switch o.
th eve hicle, it is automatically switched o. aTer
th re e minutes. Deactiv
Deactiv ating or activ
ating or activ ating t
ating the EC
he ECO st
O star
art/st
t/st op
op
function
function #
Press button 1.
A display appears in the inst rument clus ter
when switching the ECO start/s top function
o./on.
% A continuous sdisplay appears in the
inst rument clus ter while the ECO start/s top
function is deactivated. Driving and pa
rking
173
173

#
Press DYNAMIC SELECT switch 1forw ards
or backwards.
The drive prog ram selected appears in the
inst rument displa y. #
Press DYNAMIC SELECT button 2.
The DYNAMIC SELECT menu appears in the
inst rument displa y. #
Press DYNAMIC SELECT button 2again.
The chosen drive prog ram appears. Con/gur Con/gur
ing
ingD
DYN
YNAMIC SELECT (multimedia sy AMIC SELECT (multimedia sy s-
s-
t
t em)
em) Multimedia system:
4 © 5
Settings 5
Vehicle
5 DYNAMIC SELECT
Se
Se tting dr
tting dr iv
ive pr
e pr ogr
ogram I
am I #
Select Individual configuration . #
Select and set a categor y.
Switc
Switc hing t
hing t he r
he rest
estor
oration displa
ation displa y on or
y on oro.
o. #
Switch Ask when starting on or o..
F
F unction on:
unction on: the next time theve hicle is star ted a
prom ptappears asking whe ther the last active
drive prog ram should be restored.
F
F unction on:
unction on: the next time theve hicle is star ted a
prom ptappears asking whe ther the last active
drive prog ram should be restored. If the ECO
start/s top function was deacti vated, an additional prom
ptappears asking if the function should
re main deactivated.
% The prom ptappears only if the pr eviously
active settings deviate from the standard set-
tings.
F
F unction
unction o.:
o.:the next time theve hicle is star ted
th eA drive prog ram is set automaticall y.The
ECO start/stop function is activated automati-
call y.
F F unction
unction o.:
o.:ifth eÎ drive prog ram wa sthe
last one active, and all requ irements forth e drive
prog ram are ful/lled, this will be automatically
selected the next time theve hicle is star ted. If
ano ther drive prog ram wa s active, then theA
drive prog ram is set automaticall y.
% This function must be activated for each user
pro/le separatel y.Only when this function is
activated will the drive prog ram and ECO
start/s top setting forth e pr evious journey be
sa vedfo rth ere specti veuser pro/le.
% This function must be activated for each user
pro/le separatel y.The drive prog ram forthe
re specti veuser pro/le of the last driver is only
stored if this function is activated. 180
180
Driving and parking

%
You can stop theve hicle and change the
transmission position during the parking pro-
cedure. The system then calculates a new
ve hicle path. If no new vehicle path is availa-
ble, the system can change the transmission
position again or cancel the parking proce-
dure.
Exiting a par
Exiting a par king space wit
king space wit h A
h Activ
ctiv e P
e Par
arking Assist
king Assist
R
R eq
eq uir
uir ements:
ements:
R The vehicle has been par ked with Active Park-
ing Assist.
% Depending on theve hicle's equipment, the
button may also be located at a di.erent posi-
tion in the centre console.
Please no tethat you are responsible forth eve hi-
cle and sur roundings during the entire parking
procedure. #
Start theve hicle. #
Press but ton1.
The media display sh owsth e view of Active
Pa rking Assist. #
Ifth eve hicle has been par ked perpendicular
to the direction of tr avel: in area 2, select
direction of tr avel 3 Left orRight.
% The vehicle path shown on the media display
may di.er from the actual vehicle path. #
Con/rm direction of exit3 todrive out of the
parking space.
% The turn signal indicator is switched on auto-
matically when theex iting procedure begins.
Yo u are responsible for selecting the turn signal
indicator in accordance with the tra1c condi-
tions. If necessar y,select the turn signal indicator
accordingl y. 268 268
Driving and parking

ASS
YS
ASS YST PL
T PL US ser
US ser vice int
vice int erv
erval display
al display F
F
unction of t
unction of t he ASSYS
he AS SYST PL
T PL US ser
US ser vice int
vice int erv
erval dis-
al dis-
play
play The ASS
YST PLUS service inter val display on the
inst rument display informs you of the time or dis-
ta nce remaining before the next service due date.
Yo u can hide this service display using the back
button Gonthe leT-hand side of the steering
wheel.
Depending on how theve hicle is used, the
ASS YST PLUS service inter val display may shor ten
th e service inter val, e.g. in thefo llowing cases:
R Mainly short-distance driving
R When the engine is oTen leT idling for long
periods
R Intheev ent of frequent cold start phases
R V
V ehicles wit ehicles wit h a diesel par
h a diesel par ticulat
ticulate
e/lt
/lt er:
er: inthe
ev ent of frequently inter rupted rege neration of
th e diesel particulate /lter
Mercedes-Benz recommends avoiding such oper-
ating conditions. Yo
u can obtain information concerning the servic-
ing of your vehicle from a quali/ed specialist
wo rkshop, e.g. a Mercedes-Benz service cent re. Displa
Displa
ying t
ying t he ser
he ser vice due date
vice due date On-board computer:
4 Service 5
ASSYST PLUS
The next service due date is displa yed. #
T
T o e
o e xit t
xit t he displa y:
he displ ay:press the back button
G onthe leT-hand side of the steering
wheel.
Bear in mind thefo llowing related topic:
R Operating the on-board computer
(/ page 279). Inf
Inf
or
ormation on r
mation on r egular maint
egular maint enance w
enance work
ork *
N
NOOTE
TE Premature wearthro ugh failure to
obser veservice due dates Main
tenance workwhich is not car ried out at
th eright time or inco mplete ly can lead to
increased wear and damage totheve hicle. #
Adhere tothe prescribed service inter-
va ls. #
Always ha vethe prescribed maintenance
wo rkcar ried out at a quali/ed specialist
wo rkshop. N
No
ot
tes on special ser
es on special ser vice r
vice req
equir
uir ements
ements The prescribed service inter
val is based on nor-
mal operation of theve hicle. Ha vethe mainte-
nance workcar ried out more oTen than prescri-
bed if operating conditions are di1cult or the
ve hicle is subject toincreased stress.
The ASS YST PLUS service inter val display is only
an aid. The driver of theve hicle bears responsibil-
ity as rega rdsto whe ther maintenance work
needs tobe per form ed more oTen than speci/ed
based on the actual operating conditions and/or
loads.
Examples of arduous operating conditions:
R Regular city driving with frequent intermediate
stops
R Mainly short-distance driving 330 330
Maintenance and care

Engine
Engine
Displa
Displa
y messag
y messag es P
es Possible causes/conseq
ossible causes/consequences and uences andM
MSolutions
Solutions
To switch off the engine,
press the Start/Stop but-
ton for at least 3 seconds
or 3 times. *Y
ou ha vepressed the start/s top button while theve hicle is in motion. #
Information about switching o. theve hicle while driving (/ page 166).
Cannot start engine See
Owner's Manual *T
hevehicle cann otbe star ted. #
Switch theve hicle o. and switch it back on #
Ifth e display message still appears, consult a quali/ed specialist workshop.
+
Top up coolant See Own-
er’s Manual *T
he coolant le vel is too lo w.
* N NO
OTE
TE Engine damage due toinsu1cient coolant #
Avoid long journe yswith insu1cient coolant. #
Add coolant (/ page 336). #
Have the engine cooling system checked at a quali/ed specialist workshop. Displ
aymessages and warning/indicator lamps
435
435

Only select
Park (P) when vehicle is
stationary.............................................. 438
Pa rking Assist and PARKTRONIC inop-
erative See Owner's Manual................... 458
Pa rking lock inoperative Apply the
parking brake ........................................ .440
Place theke y in the mar ked space
See Owner's Manual.............................. 416
PRE-SAFE inoperative See Owner's
Manual.................................................. 414
Re duce speed........................................ 469
Re duced drive system per form ance
See Owner's Manual.............................. 425
Re versing not poss. Consult workshop ... 439
Risk of vehicle rolling away App ly
parking brake See Owner's Manual ........ 441
Risk of vehicle rolling awayPa rking
brake not applied See Owner's Manual ... 446
Risk of vehicle rolling Driver door
open and transmission not in P .............. 439Ru
n Flat Indica tor inoperative................. 470
Speed limit (winter tyres) XXX km/h .......451
Speed Limit Assist cur rently una vaila-
ble See Owner's Manual........................ 451
Speed Limit Assist inoperative................ 451
Te aching in transmission comple te......... 441
Te aching in transmission Operate
selector le ver Brake for XX seconds
Risk of vehicle rolling ............................. 440
To shiT out of P or N,depress brake
and start engine.................................... .438
To switch o. the engine, press the
St art/ Stop button for at least 3 sec-
onds or 3 times...................................... 435
Tr a1c Sign Assist cur rently una vaila-
ble See Owner's Manual........................ 453
Tr a1c Sign Assist inoperative................. 453
Tr ansmission Malfunction ....................... 440
Tr ansmission Malfunction Stop............... 439 Tr
ansmission Malfunction Visit work-
shop ...................................................... 441
Ty re press. monitor cur rently una vaila-
ble......................................................... 466
Ty re press. monitor inoperative .............. 466
Ty re press. monitor inoperative No
wheel sensors ........................................ 467
Ty re pressure Check tyres ...................... 469
Ty re(s) ove rheated .................................. 469
Ve hicle not cur rently being charged
Charging station fault............................. 424
Wi per malfunctioning .............................434
Wi thout changing gear, consult work-
shop ............................................. .426, 439
Wi thout starting engine again, consult
wo rkshop ............................................... 426
Dist
Dist ance contr ance contr ol
ol
see Active Distance Assist DISTRONIC
DIS DIS TR TRONIC
ONIC
see Active Distance Assist DISTRONIC 504
504
Index

MOEx
tended tyres................................. 348
Noise..................................................... 368
No tes on /tting...................................... 373
Re moving............................................... 381
Re placing...................................... .373, 378
Re placing the wheel trim........................ 378
Re starting the tyre pressure loss
wa rning system...................................... 373
Re starting the tyre pressure monitor-
ing system............................................. 372
Selection...............................................3 73
Snow chains.......................................... 368
St oring................................................... 377
TIREFIT kit.............................................. 350
Ty re pressure (No tes)............................. 369
Ty re pressure loss warning system
(function)............................................... 372
Ty re pressure monitoring system
(function)............................................... 371
Ty re pressure table................................ .370
Unusual handling characteristics............ 368 U U
U
Unloc nloc king
king
see Locking/unlocking U
Updat
pdat es
es
Impor tant system updates...................... 294
USB port
USB port Front st owage compartmen t.................. 119
Re ar....................................................... 130 V
V
V
V ehicle
ehicle
Activating/deactivating standby mode... 219
Ad ditional door loc k................................. 86
Cor rect use............................................. .40
Data acquisition....................................... 42
Data storag e............................................ 42
Diagnostics connection............................ 39
Equipment............................................... 26
Implied warrant y...................................... 42
Locking (automatically)............................ 88
Locking/unlocking (emer gency key)........ .89
Locking/unlocking (from inside)............... 87
Locking/unlocking (KEYLESS-GO)............ 87
Lo we ring................................................ 382
Medical aids........................................... .41
Pa rking up............................................. 218
QR code rescue car d............................... 42
Quali/ed specialist workshop.................. .40Ra
ising................................................... 379
REACH regulation.................................... 41
Re gistration............................................. 40
Setting collision de tection (par ked
ve hicle).................................................. 218
St andby mode function.......................... 218
St arting (emer gency ope ration mode ).... 166
St arting (Remo teOnline)........................ 168
St arting (start/stop but ton)................... 166
SV HC (substances of very high conce rn)..41
Switching o. (start/stop button)............ 211
Switching on (start/stop button)............ 165
To wing................................................... 276
Ve ntilating (con venience opening)........... .94
V
V ehicle batt ehicle batt ery
ery
see On-board electrical system battery (12 V)
V
V ehicle camera
ehicle camera
Information............................................ 220
V
V ehicle data
ehicle data
Displaying (DYNAMIC SELECT)............... 181
Roof load............................................... 404
Ve hicle height....................................... .403
Ve hicle length........................................ 403
Ve hicle widt h......................................... 403
Wheelbase............................................. 403 524 524
Index