fuel MERCEDES-BENZ A-CLASS SALOON 2021 Owners Manual

Changing bulbs (only
forve hicles with hal-
ogen headlamps) ......................................... 139
Wi ndsc reen wipers and windscreen
wa sher system ............................................ 141
Mir rors ........................................................ 144 Climat
Climat
e contr
e control ol........................................... 147 147
Overview of climate control systems ............ 147
Operating the climate control system .......... 148 Dr
Dr
iving and par
iving and par king
king..................................... 156 156
Driving ........................................................1 56
DY NAMIC SELECT switch ........................... .172
Manual transmission ................................... 175
Au tomatic transmission .............................. .177
Fu nction of the 4MATIC ...............................1 81
Re fuelling .................................................... 182
Charging the high-voltage battery (plug-in
hy brid) ........................................................ 188
Pa rking .......................................................2 05
Driving and driving saf ety sy stems ............... 213
Tr ailer hitch ................................................ .264
Bicycle rack function ................................... 268
Ve hicle towing instructions .......................... 270 Ins
Ins
tr
trument displa
ument displa y and on-boar
y and on-boar d com-
d com-
put
put er
er........................................................... 271 271
No tes on the inst rument display and on-
board computer .......................................... 271
Overview of instrument display .................... 272
Overview of buttons on the steering wheel ... 273
Operating the on-board computer ................2 73
Fu nction of the po wer me ter (plug-in
hy brid) ........................................................ 275
Fu nction of the electric mo tor po wer
av ailability displ ay(plug-in hybrid) ................ 275
Displaying the po wer me ter (plug-in
hy brid) ........................................................ 276
Overview of displa ysinthe inst rument
display ........................................................ 276
Head-up display .......................................... 276 MBUX multimedia syst MBUX multimedia syst
em
em........................... .279
279
Overview and operation ............................... 279
System settings .......................................... 288
Plug-in hybrid settings ................................ .292
Na vigation .................................................. .293
Te lephone ................................................... 302
Mercedes me app ....................................... 305 Mercedes-Benz emer
gency call system ....... 314
Ra dio & media ............................................ .318
Sound settings ............................................ 323 Maint Maint
enance and car
enance and car e
e................................. 324 324
ASS YST PLUS service inter val display .......... 324
Engine compartment ................................... 325
Cleaning and care ....................................... 331 Br Br
eakdo
eakdo wn assist
wn assist ance
ance................................. 340 340
Emer gency .................................................. 340
Flat tyre ...................................................... 342
Battery (vehicle) .......................................... 349
To w- starting or towing away ........................ 354
Electrical fuses ............................................ 360 Wheels and tyr Wheels and tyr
es
es......................................... 363 363
No tes on noise or unusual handling char-
acteristics ................................................... 363
No tes on regula rly inspecting wheels and
tyres .......................................................... .363
No tes on snow chains ................................. 363
Ty re pressure .............................................. 364 Contents
3 3

1
Instrument displ ay:
õ Operational readiness →
271
Po we rav ailability displ ay →
275
Po we r me ter →
275
Tr ip computer →
271
ECO Assist →
170
2 Media displa y:
Plug-in hybrid settings →
292
Energy 0ow display →
293 3
& Switches immediate pre-ent ryclimate
cont rol on/o. →
152
4 A Sets pre-entry climate control for depar-
ture time →
151
5 DYNAMIC SELECT switch →
172
6 \ Calls up the EQ menu →
292
7 qReduces recuperation →
169
8 ±Increases recuperation →
169
9 6 Depressurises the fuel tank →
182 At
a glance – Cockpit (Plug-in-Hybrid)
11
11

1
! ABS →
480
2 #! Turn signal lights →
132
3 h Tyre pressure monitoring system →
482
4 # Electrical fault →
473
5 L Distance warning →
479
6 J Brakes (yellow) →
477
7 J Brakes (red) →
477
8 ! Electric parking brake (yellow) →
477
9 ! Electric parking brake (red) →
477
A % Diesel engine: preglow
B ; Engine diagnostics →
473
C R Rear fog light →
131 D
K High beam →
132
L Low beam →
130
T Standing lights →
130
E å ESP®
OFF →
480
÷ ESP®
→
480
F 6 Restraint system →
469
G Fuel le vel →
272
H æ Reser vefuel wi thfuel /ller 0ap location
indicator →
473
I Ù Powe r steering →
472
J ü Seat belt →
469
K ï Trailer hitch →
472 At
a glance – Indicator and warning lamps (standard)
13
13

1
#! Turn signal lights →
132
2 ï Trailer hitch →
472
3 6 Restraint system →
469
4 å ESP®
OFF →
480
÷ ESP®
→
480
5 R Rear fog light →
131
6 K High beam →
132
L Low beam →
130
T Standing lights →
130
7 ÿ Coolant temp erature →
473
8 Coolant temp erature display →
272
9 ! Electric parking brake (yellow) →
477
A J Brakes (yellow) →
477
B # Electrical fault →
473 C
L Distance warning →
479
D ! ABS →
480
E Ù Powe r steering →
472
F h Tyre pressure monitoring system →
482
G % Diesel engine: preglow
H æ Reser vefuel wi thfuel /ller 0ap location
indicator →
473
I Fuel le vel →
272
J ! Electric parking brake (red) →
477
K ü Seat belt →
469
L J Brakes (red) →
477
M ; Engine diagnostics →
473
N ä Indicator lamp inoperative At
a glance – Indicator and warning lamps (widescreen cockpit)
15
15

1
Safetyve sts →
340
2 Fire extinguisher →
341
3 ; me button →
305
G SOS button →
305
4 £ Hazard warning light system →
133
5 Stow age compartment for customer literature
6 Starting assis tance →
352
7 Tocheck and top up operating 0uids →
385
8 Tow- starting or towing away →
356
9 Flat tyre →
342 A
B-pillar with:
QR code for accessing there scue card →
41
B Tow- starting or towing away →
356
C TIREFIT kit →
344
D Firs t-aid kit (soT sided) →
341
E Fuel /ller 0ap with:
information label on fuel type →
182
information label on tyre pressure →
365
QR code for accessing there scue card →
41
F Warning triangle →
340 At
a glance – Emer gencies and breakdowns
21 21

Pr
ot
Pr otection of t
ection of t he en
he envir
vironment
onment
+ ENVIR
ENVIR
ONMENT
ONMENT AL NO
AL NOTE
TE Environmental
damage due tooperating conditions and
personal driving st yleThe pollutant emission of
theve hicle is
directly related tothewa yyo u operate the
ve hicle.
Operate your vehicle in an environmentally
re sponsible manner tohelp pr otect the envi-
ro nment. Please obser vethefo llowing recom-
mendations on operating conditions and per-
sonal driving st yle.
Oper
Oper ating conditions:
ating conditions: #
Make sure that the tyre pressure is cor-
re ct. #
Do not car ryany unnecessary weight
(e.g. roof luggage rack s once you no lon-
ge r need them). #
Adhere tothe service inter vals.
A regula rly serviced vehicle will cont rib-
ute toenvironmental pr otection. #
Always ha vemaintenance workcar ried
out at a quali/ed specialist workshop.
P
P er
er sonal dr
sonal dr iving s
iving stytyle:
le: #
Do not depress the accelerator pedal
when starting the engine. #
Do not warm uptheve hicle while sta-
tionar y. #
Drive carefully and maintain a suitable
distance from theve hicle in front. #
Avoid frequent, sudden acceleration and
braking. #
Change gear in good time and use each
ge ar only up toÔ of its maximum
engine speed. #
Switch o. theve hicle in stationary traf-
fi c, e.g. byusing the ECO start/s top
function. #
Drive in a fuel-e1cient manner. Obse rve
th e ECO display for an economical driv-
ing style. Plug-in h Plug-in h
ybr
ybrid
id
+ ENVIR
ENVIR
ONMENT
ONMENT AL NO
AL NOTE
TEEnvironmental
pollution caused byirre sponsible disposal
of the high-voltage battery A high-voltage battery contains materials
which are harmful
tothe environment. #
Dispose of faulty high-voltage batteries
at a quali/ed specialist workshop. T T
ak
ak e-bac
e-bac k of end-of-lif
k of end-of-lif e v
e vehicles
ehicles
EU countr EU countr ies only:
ies onl y:
Mercedes-Benz will take back your end-of-life
ve hicle for environment-fri endly disposal in
accordance with the European Union (EU) End-of-
Life Vehicles Directi ve.
A network of vehicle take -back points and dis-
mantlers has been established foryo uto return
yo ur vehicle. You can lea veit at any of these
points free of charge . This makes an impor tant
cont ribution toclosing there cycling circle and
conserving resources. 24 24
Gene
ral no tes

with permanent magn
ets. These /elds can be
fo und, forex ample, in the area around the multi-
media and sound system or also in the area of the
seats, depending on theve hicle equipment.
Fo rth is reason, thefo llowing can occur in isolated
cases, depending on the aids used:
R Medical aids malfunctioning
R Adve rse health e.ects
Obser vethe no tes and warnings of the manufac-
turer of the medical aids; if in doubt, contact the
device manufacturer and/or your doctor. If there
is continuing uncer tainty concerning the possibil-
ity of medical aids malfunctioning, Mercedes-
Benz AGrecommends using only fewelectrical
ve hicle systems and/or main taining a distance
from the components.
Plug-in h
Plug-in h ybr
ybrid
id
When charging the high-voltage batter y,ke ep a
distance of at least an arm's length between the
medical aid and thefo llowing components:
R the po wer supply equipment This includes
charging stations in thefo rm of a
wa llbox or a public charging point, forex am-
ple.
R vehicle components car rying live voltage
This includes thech arging cable and the
ch arging cont rol box, forex ample.
Only ha verepairs and maintenance workinthe
area of thefo llowing components car ried out at a
qu ali/ed specialist workshop:
R vehicle components car rying live voltage
R transmission aerials
R multimedia system and sound system
If yo u ha veany queries or suggestions, consult a
qu ali/ed specialist workshop. Im
Im
plied w
plied w arr
arranty
anty
* NO
NOTE
TEDamage totheve hicle arising from
violation of these operating inst ructions. Damage
totheve hicle can arise from violation
of these operating inst ructions. This damage is not co
vered either bythe
Mercedes-Benz implied warranty or bythe
Ne w‑ or Used- Vehicle Warrant y. #
Follow the inst ructions in these operat-
ing inst ructions on proper operation of
yo ur vehicle as well as on possible vehi-
cle damage. QR code f
QR code f
or r
or rescue card
escue card
QR codes are attached in the fuel /ller 0ap and on
th e opposite side on the B-pillar. In theev ent of
an accident, rescue services can use the QR code
to quickly /nd the appropriate rescue card for
yo ur vehicle. The cur rent rescue card contains the
most impor tant information about your vehicle in
a compact form , e.g. thero uting of the electric
lines.
Fu rther information can be obtained at https://
www.mercedes-benz.de/qr-code. Gene
ral no tes
41 41

To
start theve hicle again, switch theve hicle
o. and on once more (/ page 160). Depend-
ing on the type and se verity of the accident,
yo u may no longer be able tostart theve hicle.
R switching o. the fuel supply
R v
v ehicles wit
ehicles wit h h
h hybr
ybr id dr
id dr iv
ive:
e: switching o. the
hy brid system and high-voltage on-board elec-
trical system
R unlocking theve hicle doors
R lowe ring the side windo ws
R displaying the emer gency guide in the multi-
media system display
R switching on the interior lighting
F
F unction of t
unction of t he pos
he post-collision brt-collision br ake
ake
Depending on the accident situation, the post-col-
lision brake can minimise the se verity of a fur ther
collision or evenavo id it.
If an accident is de tected, the post-collision brake
can implement automatic braking. When theve hi-
cle has come toa standstill, the electric parking
brake is automatically applied. The driver can cancel automatic braking
bytaking
th efo llowing actions:
R braking more strongly than automatic braking
R fully depressing the accelerator pedal with
fo rce Saf
Saf
el
ely try tr anspor
anspor ting c
ting childr
hildren in t
en in t he v
he vehicle
ehicle Alw
ay
Alw ays observ
s observ e when c
e when c hildr
hildren ar
en ar e trav
e tr avelling in t
elling in t he
he
v
v ehicle
ehicle %
Also strictly obser vethe saf ety no tesfo rthe
speci/c situation. In this wa yyo u can recog-
nise po tential risks and avoid dangers if chil-
dren are tr avelling in theve hicle
(/ page 62).
Be dilig
Be dilig ent
ent
Bear in mind that negligence when securing a
ch ild in thech ild restraint system ma y haveseri-
ous conse quences. Alw ays be dili gent in securing
a ch ild carefully before every journe y.
Ne ver allow babies and children totrave l sitting
on the lap of ano ther vehicle occupant. To
impr oveprotection forch ildren younger than
12 years old or under 1.50 m in height,
Mercedes-Benz recommends you obser vethefo l-
lowing information:
R Always secure thech ild in a child restraint sys-
te m suitable forth is Mercedes-Benz vehicle.
R The child restraint system must be appropria te
to the age, weight and size of thech ild.
R The vehicle seat must be suitable for /tting a
ch ild restraint system (/ page 66).
Ac cident statistics show that children secured on
th ere ar seats are generally sa ferth an children
secured on the front seats. Forth is reason,
Mercedes-Benz st rongly advises that you /t a
ch ild restraint system toare ar seat.
The g
The g ener eneric t
ic ter
erm c
m c hild r
hild r es
estr
traint syst
aint syst em
em
The generic term child restraint system is used in
th is Owner's Manual. A child restraint system is,
fo rex ample:
R a baby car seat
R are ar wa rd-facing child seat
R afo rw ard-facing child seat Occupant saf
ety
61
61

K
K
e
ey
y Ov
Ov
er
ervie
vie w of ke
w of key functions
y functions &
W
WARNING
ARNING Risk of accident and inju rydue
to leaving children unattended in theve hi-
cle
If ch ildren are leT unattended in theve hicle,
th ey could, in particular:
R open doors, thereby endangering other
persons or road users.
R get out and be struck byoncoming tra1c.
R operate vehicle equipment and become
trapped, forex ample.
In addition, thech ildren could also set the
ve hicle in motion by,fo rex ample:
R releasing the parking brake.
R changing the transmission position.
R starting theve hicle. #
Never lea vechildren unattended in the
ve hicle. #
When leaving theve hicle, alw aysta ke the
ke y with you and lock theve hicle. #
Keep theve hicle key out of there ach of
ch ildren. *
N
NOOTE
TE Damage totheke y caused bymag-
netic /elds #
Keep theke yaw ay from strong magnetic
/elds. Ve
hicle key
1 Locks
2 Indicator lamp 3
Unloc ks
4 Opens the boot lid
% If indicator lamp 2does not light up aTer
pressing theÜ orß button, the battery
is we ak or possibly dischar ged. Re place the
battery as soon as possible.
Re place theke y battery (/ page 84).
The key loc ksand unloc ksthefo llowing compo-
nents:
R Doors
R Fuel /ller 0ap
R Soc ket 0ap (plug-in hybrid)
R Boot lid
If th eve hicle is not opened within appr oximately
40 seconds aTer unlocking, it loc ksagain. Anti-
th eT pr otection is primed again.
Do not keep theke yto get her with elect ronic devi-
ces or me tal objects. This can a.ect theke y's
functionalit y. 82 82
Opening and closing

A
A
ctiv
ctiv ating/deactiv
ating/deactiv ating t
ating the acous
he acous tic loc
tic locking
kingv
ver
er i/-
i/-
cation
cation signal
signal Multimedia system:
4 © 5
Settings 5
Vehicle #
Activate or deactivate Acoustic lock.
% Please observ
Please observ e:
e:
The selected setting forth e acoustic locking
ve ri/cation signal must comply with there le-
va nt national road and tra1c regulations. In
some countries, including German y,using the
acoustic locking veri/cation signal is forbid-
den bytra1c la ws(in accordance with §16
Pa ra. 1 and §30 Para. 1 of the German
national road tra1c regulations). The driver of
th eve hicle must comply with these regula-
tions. In countries where the use of this func-
tion is forbidden, this function is not activated
in theve hicle and must not be activated. Changing t
Changing t
he unloc
he unlocking se
king se ttings
ttings Po
ssible unlocking functions of theke y:
R Central unlocking
R Unlocking the driver's door and fuel /ller 0ap R
Plug-in h Plug-in h ybr ybrid:
id:unlocking the driver's door and
fuel /ller 0ap/soc ket0 ap #
T To switc o switc h be
h betw
tween se
een se ttings:
ttings: presstheÜ
and ß buttons simultaneously for appr ox-
imately six seconds until the indicator lamp
0ashes twice.
Options if the unlocking function forth e driver's
door and fuel /ller 0ap has been selected:
R T To unloc o unloc k t
k the v
he v ehicle centr
ehicle centr ally:
all y: press the
Ü button twice.
R V
Vehicles wit
ehicles wit h KEYLESS-GO:
h KEYLESS-GO: ifyo uto uch the
inner sur face of the door handle on the driv-
er's door, only the driver's door and the fuel
/ller 0ap are unloc ked.
Options if the unlocking function forth e driver's
door and fuel /ller 0ap/soc ket0 ap has been
selected (plug-in-hybrid):
R T
To unloc
o unloc k t
k the v
he v ehicle centr
ehicle centr ally:
all y: press the
Ü button twice.
R V
Vehicles wit
ehicles wit h KEYLESS-GO:
h KEYLESS-GO: ifyo uto uch the
inner sur face of the door handle on the driv-
er's door, only the driver's door and the fuel
/ller 0ap/soc ket0 ap are unloc ked. Deactiv
Deactiv
ating t
ating the function of t
he function of t hekey
he key V
V
ehicles wit
ehicles wit h KEYLESS-GO:
h KEYLESS-GO: ifyo u deactivate the
function of theke y,the KEYLESS-GO functions are
also deactivated. Access or drive authorization by
KEYLESS-GO is then no longer possible with that
particular key.Activate the function of theke y so
th at all its functions will again be available.
Yo u can also deactivate the function of theke yto
re duce the energy consum ption of theke y if you
do not use theve hicle or a keyfo r an extended
period of time. #
T
To deactiv
o deactiv at
ate:
e: press theß button on the
ke y twice in quick succession.
The key indicator lamp 0ashes twice brie0y
and lights up once. #
T
To activ
o activ at
ate:
e: press any but ton on thekey.
% When theve hicle is star ted with theke y in the
st ow age compartment of the centre console,
th e function of theke y is automatical lyactiva-
te d (/ page 160). Opening and closing
83
83