reset MERCEDES-BENZ A-CLASS HATCHBACK 2021 User Guide

a break!
warning appears in the Instrument Dis-
pla y.Yo u can ackno wledge the message and take
a break where necessar y.Ifyo u do not take a
break and ATTENTION ASSIST continues todetect
increasing lapses in concentration, you will be
wa rned again aTer a minimum of 15 minutes. Yo
u can ha vethefo llowing status information for
AT TENTION ASSIST displa yed in the assistance
menu of the on-board computer:
R The length of the journey since the last break.
R The attention le vel de term ined byATTENTION
ASSIS T:
- the fuller the circle, the higher the atten-
tion le vel de term ined -
asyour attention wanes, the circle in the
cent reofthe display becomes smaller
If AT TENTION ASSIST is unable tocalculate the
attention le vel and cannot issue a warning, the
System suspended message appears.
If a warning is given in the Instrument Displa y,the
multimedia system o.ers tosear chfor a rest
area. You can select a rest area and start naviga-
tion tothis rest area. This function can be acti va-
te d and deactivated in the multimedia system.
If AT TENTION ASSIST is deactivated, theÛ
symbol appears in the assistance graphic in the
Instrument Displ ay. ATer theve hicle is star ted,
AT TENTION ASSIST is automatically activated. The
last selected sensitivity le velre mains stored.
Syst
Syst em limits
em limits
AT TENTION ASSIST is active in the 60 km/h to
200 km/h speed range.
Pa rticular lyin thefo llowing situations, ATTENTION
ASSIST only functions in a restric ted manner and
wa rnings may be dela yed or not occur:
R Ifyo u ha vebeen driving for less than appr ox-
imately 30 minutes. R
Ifth ero ad condition is poor (une venro ad sur-
fa ce or po tholes).
R Ifth ere is a strong side wind.
R Ifyo u adopt a sporty driving style (high corner-
ing speeds or high rates of acceleration).
R IfAc tive Steering Assist is activated and active
(/ page 238).
R Ifth e time has been set incor rectl y.
R Ifyo uch ange lanes and vary your speed fre-
qu ently in active driving situations.
The ATTENTION ASSIST dr owsiness or alertness
assessment is reset and restar ted when continu-
ing the journey in thefo llowing situations:
R You switch o. theve hicle.
R Ifyo u unfasten your seat belt and open the
driver's door (e.g. tochange drivers or take a
break). 228
228
Driving and parking

Ov
Ov
er
ervie
vie w of ins
w of ins tr
trument display
ument display 1
LeT display area of the inst rument display
(e xamp le: speedome ter): speedome ter /
time / date / trip computer From startand
From reset /range / audio
The segments on the speedome ter indicate
th e statuses of thefo llowing systems: cruise
control/limiter/Active Distance Assist
DISTRONIC 2
Outside temp erature
3 Digital speedome ter
4 Time
5 Right display area of the inst rument display
(e xamp le:tach ome ter): tach ome ter / average
fuel consum ption / ECO display /naviga-
tion / G-me ter / assistant display / po werme
ter / po werav ailability displ ayofthe elec-
tric mo tor (equipment-dependent)
The fuel supply will be inter rupted toprotect
th e engine when there d mark on therev
counter (o verrev ving range) is reached.
6 Index points
These show the selected display or menu con-
te nt. 278 278
Instrument display and on-board computer

The driver's seat is equipped with an access pre-
ve
nter.
If th e driver's door is open, the driver's seat will
not
not be set aTer calling up the driver's pro/le.
Pro/les store your vehicle settings and settings
fo rth e multimedia system. If theve hicle is used
by several drivers, the driver can select their own
pro/le without changing the stored pro/le settings
of other drivers.
% Information on pro/les from Mercedes me
connect can be found in the Digital Opera-
to r's Manual.
Ve hicle settings are, forex ample, driver's seat,
steering wheel and mir ror settings, climate control
and ambient lighting. Forth e settings of the multi-
media system, you can select, forex ample, radio
stations, pr evious destinations as well as themes,
suggestions and favo urites.
Fo rre cur ring driving situations, such as long
drives on the mo torw ay,yo u can sa veyour prefer-
re d settings in a theme in theve hicle. In a theme
yo u can sa vethe display of the digital map, your
prefer redra dio station and prefer red drive pro-
gr am, forex ample. The
vehicle can learn the habits of the driver. It
th en o.ers suggestions forth e most probable
navigation destinations, media sources, radio sta-
tions or contacts. The pre-requirements forth at
are the selection of a pro/le, your consent tothe
re cording of data and su1cient collected data.
Fa vourites pr ovide quick access toapplications
th at are used oTen. You can select favo urites
from categories or add them directly toan appli-
cation. Con/gur
Con/gur ing ingpr
pro/les,
o/les, t
themes and sugg
hemes and sugg es
es tions
tions Multimedia system:
4 © 5
f Profiles
Cr
Cr eating a ne
eating a ne w
wpr
pro/le
o/le #
Select WCreate profile . #
Select an avatar. #
Enter the name and con/ rmwith a. #
Select Continue r. #
Select Current settings . #
Select Save. #
Activate Blue tooth ®
and select Connect
phone, toconnect a mobile phone with the
user pro/le . #
Select Finished.
Selecting
Selecting pr
pr o/le
o/le op
options
tions #
Select Äfor a pro/le.
The following functions are available:
R Editing, resetting or deleting a pro/le
R Resetting themes or favo urites
R Con/guring suggestions
Con/gur Con/gur ing ingsugg
sugg es
estionstions #
Select Äfor a pro/le. #
Select Suggestions settings. #
Switch Allow destination suggestions, Allow
music suggestions andAllow contact sugges-
tions on or o.. #
T
To deactiv
o deactiv at
ate t
e t he lear
he lear ning function f
ning function f or one
or one
day
day :
:activate Deact. learn. for 24h .
Fo r 24 hours no new actions will be trained
and no data recorded forth e active pro/le.
Suggestions will continue tobe shown. MBUX multimedia system
293
293

Example: if
the option is switched on and a
ro ute toa new destination has been calcula-
te d, this destination would not be take n into
account forth e learning function.
Cr
Cr eating ne
eating ne w t
w themes
hemes #
Select ©. #
Select THEMES. #
Select WSet theme .
The settings which are sa ved in theth eme are
shown. #
Select Continue r. #
Select AudioandNavigation (Navigation) and
store the active settings in theth eme. #
Select Continue r. #
Select an entry screen. #
Select Continue r. #
Select an image. #
Enter the names into the entry /eld and con-
/rm with a. #
Select Save. Syst
Syst
em se
em se ttings
ttings Ov
Ov
er
ervie
vie w of t
w of t he sy
he syst
stem se
em se ttings menu
ttings menu In
the system settings menu, you can make set-
tings in thefo llowing menus and control ele-
ments:
R Display
- Styles
- Instrument lighting
- Display brightness
- Edge lighting
- Day/night design
R Control elements
- Keyboard language and handwriting recog-
nition
- Sensitivity of theto uchpad
- Sensitivity of theTo uch Controls
R LINGU ATRO NIC
R Sound
- Enter tainment
- Navigation and tra1c announcements -
Telephone
- Voice ampli/cation tothere ar
R Connectivity
- Wi-Fi, Blue tooth ®
, NFC
R Time & date
R Language
R Units for distance
R SoTware updates
R Data import/export
R PIN pr otection
R System Reset Inf
Inf
or
ormation on im
mation on im port
portant syst
ant syst em updat
em updat es
es Impor
tant system updates may be necessary for
th e security of your multimedia system's data.
Install these updates, or else the security of your
multimedia system cannot be ensured.
A system update consists of thre e steps:
R Downloading or copying of the data requ ired
fo r installation
R Installation of the downloaded system update 294 294
MBUX multimedia system

%
Websites cannot be shown while theve hicle is
in motion. Ov
Ov
er
ervie
vie w of smar
w of smar tphone int
tphone int egr
egration
ation Wi
th Sma rtphone Integ ration, you can use cer tain
functions on your mobile phone via the multime-
dia system displa y.
Only one mobile phone at a time can be connec-
te d via Smartphone Integ ration tothe multimedia
system. Also for use with two phone mode with
smartphone integ ration, only one additional
mobile phone can be connec ted using Blue tooth ®
with the multimedia system.
The full range of functions for Smartphone Inte-
gr ation is only possible with an Internet connec-
tion. The appropriate application must be down-
loaded on the mobile phone touse Smartphone
Integ ration. The mobile phone must be switched
on and connec tedto a USB port with theç
symbol on the multimedia system using a suitable
cable.
Apps for Smartphone Integ ration
R Apple CarPlay ® R
Android Auto
% For saf etyre asons, the /rst activation of
Smartphone Integ ration on the multimedia
system must be car ried out when theve hicle
is stationary and the parking brake is applied.
Yo u can start Apple CarPlay ®
or Android Auto
from the device manager.
% Mercedes-Benz recommends disconnecting
th e connecting cable only when theve hicle is
stationar y.
Ov
Ov er ervie
vie w of tr
w of tr ansf
ansferr
erred v
ed v ehicle data
ehicle data
When using Smartphone Integ ration, cer tain vehi-
cle data is transfer redto the mobile phone. This
enables youto get the best out of selected mobile
phone services. Vehicle data is not directly acces-
sible.
The following system information is transmitted:
R SoTware release of the multimedia system
R System ID (anonymised)
The transfer of this data is used tooptimise com-
munication between theve hicle and the mobile
phone. To
do this, and toassign se veralve hicles tothe
mobile phone, a vehicle identi/er is random lyge n-
erated.
This has no connection totheve hicle identi/ca-
tion number (VIN) and is dele ted when the multi-
media system is reset (/ page 298).
The following driving status data is transmitted:
R Transmission position engaged
R Distinction between par ked, standstill, rolling
and driving
R Day/night mode of the inst rument clus ter
R Drive type
The transfer of this data is used toalter how con-
te nt is displa yedto cor respond tothe driving sit-
uation.
The following position data is transmitted:
R Coordinates
R Speed
R Compass direction
R Acceleration direction MBUX multimedia system
319 319

Symbol
Symbol
DesignationF
Designation Function
unction
Z SettingsS electtohave further options shown. Settings can be made tothefo llowing additional
functions, forex ample:
R Navigation and tra1c announcements
R Frequency /x function
R Radio additional text
R Emer gency warnings
The setting options are countr y-dependent.
2 Full screen Selecttoswitch totheDA B slide sh ow.
This function is not available in all countries.
8 Silent functionSelecttoswitch o. the sound.
f Store radio stations Select tosave a station in the presets.
4 Station lis tS electtohave the station list shown.
ª Search Selecttosear chinthe active menu. You can search for artists, genres or moods, for
ex ample. MBUX multimedia system
327
327

R
Frequent operation in mountainous terrain or
on poor road sur faces
R When the engine is oTen leT idling for long
periods
R Operation in particular lydusty conditions
and/or if air-recirculation mode is frequently
used
In these or similar operating conditions, ha vethe
interior air /lter, air /lter, engine oil and oil /lter,
fo rex ample, changed more frequentl y.The tyres
must be checked more frequently if theve hicle is
operated under increased loads. Further informa-
tion can be obtained at a quali/ed specialist work-
shop. Batt Batt
er
ery disconnection per
y disconnection per iods
iodsThe AS
SYST PLUS service inter val display can cal-
culate the service due date only when the battery
is connected. #
Display and no tedown the service due date
on the inst rument display before disconnect-
ing the battery (/ page 330). Engine com
Engine com
par
partment
tment A
A
ctiv
ctiv e bonne
e bonne t (pedes
t (pedestr trian pr ot
ian pr otection)
ection) Oper
Oper
ation of t
ation of t he activ
he active bonne
e bonne t (pedes
t (pedestr trian pr ot
ian pr otec-
ec-
tion)
tion)
In cer tain accident situations, the actuation of the
active bonnet reduces therisk of injury topedes-
trians. The rear area of the bonnet is raised by
appr oximately 70 mm.
Fo rth e drive tothewo rkshop, reset the actuated
active bonnet yourself (/ page 331).
ATer the active bonnet has been actuated, pedes-
trian pr otection may be limited.
Ha ve the full functionality of the active bonnet
re stored in a quali/ed specialist workshop.
R
R ese ese tting t
tting t he activ
he activ e bonnet
e bonnet &
W
WARNING
ARNING Risk of burns from hot compo-
nent parts in the engine compartment
Cer tain component parts in the engine com-
partment can be very hot, e.g. the engine, the
cooler and parts of theex haust system. #
Allow the engine tocool down and only
to uch component parts described in the
fo llowing. #
With your hand 0at, push down active bonnet
1 inthe area around the hinges on bo th
sides (ar rows ).
In doing so, the actuator is depressurised and
yo u may hear a hissing sound.
The engine bonnet must engage in position. #
Ifth e active bonnet can be raised slightly at
th ere ar in the area of the hinges, repeat the
step until it engages co rrectl y. Maintenance and ca
re
331
331

R
The wind ows and the sliding sunroof are
closed.
R The air conditioning system is set toair-recir-
culation mode.
R Parking Assist PARKTRONIC is deactivated.
R V
Vehicles wit
ehicles wit h 360° Camer
h 360° Camer a:
a:the front image is
activated aTer appr ox. eight seconds.
If one of the settings cannot be selected, this is
displa yedby a% behind there specti veset-
ting.
Ab ove a speed of 20 km/h Car wash mode is
automatically deacti vated.
The following settings are reset when car wash
mode is deacti vated:
R The outside mir rors are folded out.
R The rain sensor is activated.
R The rear wind owwiper is activated.
R The air conditioning system is set tofresh air
mode.
R Parking Assist PARKTRONIC is reset tothe
pr ev iously selected setting. R
The windo wsand the sliding sunroof remain
closed.
R V
V ehicles wit ehicles wit h 360° Camer
h 360° Camer a:
a:the front image is
deactivated at speeds abo ve18 km/h. A
A
ctiv
ctiv ating/deactiv
ating/deactiv ating aut
ating automatic car w
omatic car w ash mode
ash mode R
R
eq
eq uir
uir ements:
ements:
R theve hicle is stationar y.
R the engine is running.
Multimedia system: 4 © 5
Settings 5
Quick access
A
A ctiv
ctiv ating aut
ating aut omatic car w
omatic car w ash mode
ash mode #
Select Car wash mode . #
Select Start.
If one of the settings cannot be selected, this is
displa yedby a% behind there specti veset-
ting.
% For an overview of the settings made when
activating automatic car wash mode
(/ page 337). Deactiv Deactiv
ating aut
ating aut omatic car w
omatic car w ash mode
ash mode #
Select Stop.
The automatic car wash settings are reset.
% The automatic car wash mode is automatically
deacti vated as soon as a speed of 20 km/h is
ex ceeded. Inf
Inf
or
ormation on using a high-pr
mation on using a high-pr essur
essure cleaner
e cleaner &
W WARNING ARNING Risk of an accident when using
high-pressure cleane rswith round-spr ay
nozzles
The water jet can cause extern ally invisible
damage.
Components damaged in this wa y may un ex-
pectedly fail. #
Do not use a high-pressure cleaner with
round-spr aynozzles. #
Have damaged tyres or chassis parts
re placed immediatel y. Maintenance and ca
re
339 339

R
R
egulat
egulat or
ory r
y r adio
adio identi/cation
identi/cation
Indonesia............................................... 391
Small components................................. 391
R R emot
emot e Online
e Online
Charging the star ter batter y................... 167
Cooling/heating theve hicle interior....... 167
St arting theve hicle............................... .168
R
R eplacing a bulb
eplacing a bulb
see Changing bulbs
R
R escue card
escue card................................................... 42
R
R eser ve
eser ve
Fu el....................................................... 397
R
R ese
ese t function (MBUX multimedia syst
t function (MBUX multimedia syst em)
em).... 298
R
R esidual heat
esidual heat............................................... 155
R
R est
est or
oring (f
ing (f act
actor
ory se
y se ttings)
ttings)
see Reset function (MBUX multimedia system)
R
R es
es tr
traint syst
aint syst em
em
Basic instructions forch ildren.................. 61
Fu nction in an accident............................ 47
Fu nctionality........................................... .47
Limited pr otection....................................46
Malfunction............................................. 47
Pr otection................................................ 46 Self-test...................................................47
Wa
rning lamp........................................... 47
R
R e ev
ver
er se g
se g ear
ear
Engaging................................................ 184
Rev
Rev er
ersing camera
sing camera
Care...................................................... 342
Fu nction................................................ 255
Opening the camera co ver (360°
Camera)................................................ 260
Switching automatic operation on/o.
(360° Camera)...................................... 260
Rev Rev er
ersing lights (c
sing lights (c hanging bulbs)
hanging bulbs).................. 145
Rims (car
Rims (car e)
e).................................................. 342
R
R oll awa
oll awa y prot
y pr otection
ection
see HOLD function
R
R oller sunblind
oller sunblind
Sliding sunroof......................................... 95
R
R oof lining (car
oof lining (car e)
e).......................................... 343
R
R oof load
oof load.....................................................4 04
R
R oof lugg
oof lugg ag
age r
e r ack
ack
Loading.................................................. 127
Securing................................................ 127 R R
oute
oute
Calculating............................................. 303
Selecting options................................... 303
R
R out
out e guidance wit
e guidance wit h augment
h augmented r
ed reality
eality
Ac tivating............................................... 303
Displaying street names and house
numbers................................................ 303
R R out
out e-based oper
e-based oper ating-mode s
ating-mode strtrat
at egy
egy
Fu nction/no tes...................................... 177
R
R out
out e-based speed adapt
e-based speed adapt ation
ation
Fu nction................................................ 237
Setting.................................................. .238
R
R un-0at
un-0at c
char
har act
acter
eristics
istics
MOExtended tyres................................. 348
R
R unning-in not
unning-in not es
es.......................................... 168 S
S
Safe
Safe ty syst
ty syst ems
ems
see Driving saf ety sy stem
Sa fe
Safe ty v
ty vest
est.................................................. .346
Searc
Searc h light
h light
Switching on/o. (contactless). .............. 291518
518
Index