steering MERCEDES-BENZ A-CLASS SALOON 2021 Service Manual

R
the drive prog ram selected
R the driving style
The drive prog ram can be adjus ted using the
DY NAMIC SELECT switch. R
R
e
ev
ver
er sing came ra
sing camera F
F
unction of t
unction of t herev
he rever
ersing camera
sing camera
If yo u ha veactivated the function in the multime-
dia system (/ page 254),the image from the
re ve rsing camera is displa yed in the media display
when reve rsege ar is selected. Dynamic guide
lines show the path theve hicle will take with the
cur rent steering angle. This helps youto orient
yo urself and toavo id obstacles when reve rsing.
The reve rsing camera is only an aid. It is not a
substitute foryo ur attention tothe sur roundings.
The responsibility for safe manoeuvring and par k-
ing remains with you. Make sure that there are no
persons, animals or objects etc., in the manoeu-
vring area while manoeuvring and parking.
% You can open the co ver of there ve rsing cam-
era manually (/ page 254). The guide lines in
the media display show the dis-
ta nces toyour vehicle. The dis tances displa yed
only apply toroad le vel.
Depending on theve hicle equipment, you can
select from thefo llowing vie ws:
R Normal view
R Wide-angle view
R Trailer view
The area behind theve hicle is displ ayed as a mir-
ro r image, as in the inside rearview mir ror.
V
V ehicles wit
ehicles wit hout P
hout Par
arking Assis
king Assist P t PARK
ARK TR
TRONIC
ONIC
The following camera vie wsare available in the
multimedia system: Normal view
1 Yellow guide line, vehicle width (driven sur-
fa ce) depending on the cur rent steering angle
(dynamic)
2 Yellow guide line at a distance of appr ox-
imately 1.0 m from there ar area
3 Yellow lanes marking the course the tyres will
ta ke with the cur rent steering angle (dynamic)
4 Bumper
5 Red guide line at a distance of appr oximately
0.3 m from there ar area Driving and parking
249
249

Wi
de-angle view Tr
ailer view (vehicles with a trailer hitch)
1 Yellow guide line, locating aid 2
Red guide line at a distance of appr oximately
0.3 m from the ball head of the trailer hitch
3 Ball head of the trailer hitch
V
V ehicles wit
ehicles wit h P
h Par
arking Assis
king Assist P t PARK
ARK TR
TRONIC
ONIC
The following camera vie wsare available in the
multimedia system: Normal view
1 Yellow lanes marking the course the tyres will
ta ke with the cur rent steering angle (dynamic)
2 Yellow guide line, vehicle width (driven sur-
fa ce) depending on the cur rent steering angle
(dynamic) 3
Red guide line at a distance of appr oximately
0.3 m from there ar area
4 Yellow warning indicator of Parking Assist
PA RKTRONIC: obstacles at a distance
between app roximately 0.6 m and 1.0 m
5 Redwa rning display of Parking Assist
PA RKTRONIC: obstacles are very close
(appr oximately 0.3 m or less)
6 Orange warning display of Parking Assist
PA RKTRONIC: obstacles are a medium dis-
ta nce away (between appr oximately 0.3 m
and 0.6 m) Wi
de-angle view 250
250
Driving and parking

%
You can open the co ver of there ve rsing cam-
era manually (/ page 254).
V
V iew
iew s of t
s of t he 360° Camera
he 360° Camera
Yo u can select from di.erent vie ws:1
Wide-angle vie w,front
2 Top view with image from the front camera
3 Top view with images from the side cameras
in the outside mir rors
4 Wide-angle vie w,rear
5 Top view with image from there ve rsing cam-
era
6 Top view with trailer view (vehicles with a
trailer hitch) T
T op view
op view 1
Lane indicating thero ute theve hicle will take
at the cur rent steering wheel angle
2 Warning display of Parking Assist
PA RKTRONIC
3 Your vehicle from abo ve
The colour of the individual segments of warning
display 2is based on the distance tothe de tec-
te d obstacle:
R Y
Yello
ello w segments:
w segments: obstacles at a distance
between appr ox. 0.6 m and 1.0 m
R Or
Orang
ang e segments:
e segments: obstacles at a distance
between appro x. 0.3 m and 0.6 m R
R
Red segments:
ed segments: obstacles at a very short dis-
ta nce of app rox. 0.3 m or less
When Parking Assist PARKTRONIC is ope rational
and no object is de tected, the segments of the
wa rning display are shown in grey.
Guide lines
Guide lines 1
Yellow lane marking the course the tyres will
ta ke atthe cur rent steering wheel angle
(dynamic)
2 Yellow guide line, vehicle width (driven sur-
fa ce) depending on the cur rent steering wheel
angle (dynamic) 252
252
Driving and parking

when
Parking Assist PARKTRONIC sounds a warn-
ing tone. #
Select Audio fadeout during warning tones .#
Switch the function on or o.. A
A
ctiv
ctiv e P
e P ar
ar king Assist
king Assist F
F
unction of A
unction of A ctiv
ctive P
e Par
arking Assist
king Assist
Ac tive Parking Assist is an electronic parking
assistance system, which uses ultrasound with
th e assistance of there ve rsing camera and 360°
Camera. When you are driving forw ards up to
appr oximately 35 km/h, the system automatically
measures parking spaces on bo thsides of the
ve hicle.
Ac tive Parking Assist o.ers thefo llowing func-
tions:
R Country
Country -dependent
-dependent: :parking in parking spaces
parallel tothero ad
R Parking in parking spaces perpendicular tothe
ro ad (optionally either forw ards or reve rse)
R Exiting parking spaces if you ha vepar ked
using Active Parking Assist As soon as all
requ irements are met for sear ching
fo r parking spaces, theÇ display appears in
th e Instrument Displa y.
When Active Parking Assist has de tected parking
spaces, theÈ display appears in the Instru-
ment Displa y.The ar rows show on which side of
th ero ad de tected parking spaces are located.
They are then shown in the media displa y.
The parking space can be selected as desired.
Depending on the location of the parking space,
th e parking direction (rear wards or forw ards) can
also be selected as desired.
When Active Parking Assist is activated, the turn
signal indicators are activated based on the calcu-
lated path of your vehicle.
When you are entering or exiting a parking space,
th e procedure is assisted byacceleration, braking,
steering and gear changes.
V V ehicles wit
ehicles wit h manual tr
h manual tr ansmission:
ansmission: the active
brake application and automatic gear change are
only available on vehicles with automatic trans-
mission. You must therefore brake theve hicle and
ch ange gear yourself when parking or exiting a
parking space. Ac
tive Parking Assist is only an aid. It is not a sub-
stitute foryo ur attention tothe sur roundings. The
re sponsibility for safe manoeuvring and parking
re mains with you. Make sure that no persons, ani-
mals or objects etc. are in the manoeuvring
ra nge.
Ac tive Parking Assist will be cancelled in thefo l-
lowing situations:
R Parking Assist PARKTRONIC is deactivated.
R You begin steering.
R You apply the parking brake.
R V
V ehicles wit
ehicles wit h aut
h automatic tr
omatic tr ansmission:
ansmission: you
engage transmission position j.
R ESP ®
inter venes.
R You open the doors or the boot lid while driv-
ing.
Syst
Syst em limits
em limits
If th eex terior lighting is malfunctioning, Active
Pa rking Assist is not available.
Objects located abo veor below the de tection
ra nge of the sensors, e.g. overhanging loads,
ov erhangs or loading ramp s of goods vehicles, or
th e borders of parking spaces, are not de tected Driving and parking
259
259

R
From point 3,the maximum recuperated
energy has been reached.
R The cur rent state of charge of high-voltage
battery 5is displa yed. Displa
Displa
ying t
ying the pow
he pow er met
er meter (plug-in h
er (plug-in h ybr
ybrid)
id)
On-board computer: 4 Content #
Select Power meter. Ov
Ov
er
ervie
vie w of display
w of display s in t
s in the ins
he ins tr
trument display
ument display
Displa yson the inst rument displa y:
u Active Parking Assist (/ page 260)
é Parking Assist PARKTRONIC deactivated
(/ page 258)
h Cruise control (/ page 223)
È Limiter (/ page 223)
ç Active Distance Assist DISTRONIC
(/ page 226)
æ Active Brake Assist (/ page 235) à
Active Steering Assist (/ page 232)
à Active Lane Keeping Assist (/ page 246)
ò Sound generator inoperative (/ page 415)
è ECO start/stop function (/ page 166)
ë HOLD function (/ page 219)
_ Adaptive Highbeam Assist (/ page 135)
Ad aptive Highbeam Assist Plus
(/ page 136)
ð Maximum permissible speed exceeded (for
cer tain countries only)
V
V ehicles wit
ehicles wit h Speed Limit Assist:
h Speed Limit Assist: detected
instructions and tra1c signs (/ page 240).
V
V ehicles wit
ehicles wit h
hTr
Tra1c
a1c Sign Assist:
Sign Assist: detected instruc-
tions and tra1c signs (/ page 241). Head-up display
Head-up display
F
F
unction of t
unction of t he head-up display
he head-up display *
N
NOOTE
TE Mercedes-AMG vehicles #
Obser vethe no tes in the Supplement.
Yo u could otherwise failto recognise
dangers. The head-up display projects
thefo llowing infor-
mation into the driver's /eld of vision abo vethe
cockpit, forex ample:
R The vehicle speed
R Information from the navigation system
R Information from the driving systems and driv-
ing saf ety sy stems
R Some warning messages
Depending on theve hicle's equipment, di.erent
content can be shown in theth re e areas of the
head-up displ ay (/page 277). 276
276
Inst
rument 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
287
287

switched OFF,
this means the emer gency call sys-
te m passed diagnostics successfull y.S
S
t
tar
ar ting/ending ERA
ting/ending ERA -GL
-GLON
ONASS t
ASS t es
est mode
t mode R
R
eq
eq uir
uir ements:
ements:
R The star ter battery is su1ciently charge d.
R The vehicle is switched on.
R The vehicle has been stationary for at least
one minute.
% The test mode is cu rrently available in thefo l-
lowing countries, forex ample:
R Russia
R Belarus
R Kazakhstan
R Armenia
R Kyrgyzs tan #
T
To st
o st ar
art t
t t he t
he t es
est mode:t mode: press and hold the
~ button on the multifunction steering
wheel for at least /ve seconds.
The test mode is star ted and automatically
ends aTer the language test has been pe r-
fo rm ed. #
T
To st
o st op manual t
op manual t es
est mode:t mode: switch o. theve hi-
cle.
The test mode is ended. MBUX multimedia system
317 317

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 273). 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 324 324
Maintenance and care

#
LeT-hand
LeT-hand dr
driv
ive v
e v ehicle:
ehicle: pulltab1 upwards. #
Right-hand dr
Right-hand dr iv
ive v
e v ehicle:
ehicle: pulltab1 down-
wa rds. #
Remo ve/re extinguisher 2. Flat tyre
Flat tyre
N
No
ot
tes on
es on 0at
0attyr
tyr es
es &
W
WARNING
ARNING Risk of accident due toa 0at
tyre
A 0at tyre se verely a.ects the driving charac-
te ristics as well as the steering and braking of
th eve hicle. T
T
yr
yr es wit
es wit hout
houtr
run-0at
un-0at c
char
har act
acter
eristics:
istics: #
Do not drive with a 0at tyre. #
Change the 0at tyre immediately with an
emer gency spa rewheel or spare wheel.
Alternativel y,consult a quali/ed special-
ist workshop.
T
T yr
yr es wit
es wit h
hr
run-0at
un-0at c
char
har act
acter
eris
istics:
tics: #
Obser vethe information and warning
no tes on MOExtended tyres (run-0at
tyres). In
theev ent of a 0at tyre, thefo llowing options are
av ailable depending on your vehicle's equipment:
R V
Vehicles wit
ehicles with MOExt h MOExtended tyr
ended tyr es:
es:it is possible
to continue the journey for a short period of
time. Make sure you obser vethe no tes on
MOExtended tyres (run-0at tyres)
(/ page 342).
R V Vehicles wit
ehicles wit h a TIREFIT kit:
h a TIREFIT kit: you can repair the
tyre so that it is possible tocontinue the jour-
ney for a short period of time. Todo this, use
th e TIREFIT kit (/ page 344). R
V
Vehicles wit
ehicles wit h Mer
h Mercedes me connect:
cedes me connect: you can
make a call for breakdown assistance via the
ove rhead control panel in the case of a break-
down (/ page 305).
R All v
All v ehicles:
ehicles: change the wheel (/ page 373). N
No
ot
tes on MOExt
es on MOExt ended tyr
ended tyres
es(r
(run-0at
un-0at tyr
tyres)
es) &
W
WARNING
ARNING Risk of accident when driving in
limp-home mode
Driving in emer gency mode impai rsthe han-
dling characteristics of theve hicle. #
Do not exceed the permissible maximum
speed of the MOExtended tyres. #
Avoid any abrupt steering and driving
manoeuvres as well as driving over
obstacles (kerbs, pot holes, o.-road).
This applies, in particular, toa loaded
ve hicle. #
Stop driving in the emer gency mode if
yo u notice:
R banging noise 342 342
Breakdown assistance

T
T
o
o w
w -st
-st ar
arting or to
ting or towing away
wing away P
P
er
er mitt
mitt edto
ed towing met
wing met hods (non plug-in h
hods (non plug-in h ybr
ybrid)
id) Mercedes-Benz
recommends transporting your
ve hicle in the case of a breakdown, rather than
to wing it away.
Fo rto wing, use a tow rope or tow bar with bo th
axles on thegr ound. Do not use tow bar systems. &
W
WARNING
ARNING Risk of accident when towing
with steering wheel lock
If th e steering wheel lock is engaged, you will
not be able tosteer theve hicle. #
When towing with a tow rope or tow bar,
alw ays switch on theve hicle. *
N
NOOTE
TE Damage totheve hicle due to tow-
ing awa y incor rectly #
Obser vethe inst ructions and no tes on
to wing away. P
P
er
er mitt
mitt edto
ed towing met
wing met hods
hods V
V
ehicle eq
ehicle eq uipment/to
uipment/to wing met
wing method
hod Bot
Bot
h axles on t
h axles on t hegr
he ground
ound F
F
r
ront axle r
ont axle r aised
aised R
R
ear axle r
ear axle r aised
aised
Ve hicles with manual transmission Yes, maximum 50 km at 50 km/h Yes, maximum 50 km at 50 km/h Yes, maximum 50 km at 50 km/h
Ve hicles with automatic transmis-
sion Ye
s, maximum 50 km at 50 km/h Yes, maximum 50 km at 50 km/h Yes, maximum 50 km at 50 km/h
4MATIC vehicles Yes, maximum 50 km at 50 km/h No No354
354
Breakdown assis
tance