engine MERCEDES-BENZ A-CLASS HATCHBACK 2021 User Guide

#
T
To call up:
o call up: press and brie0y hold one of preset
position buttons 4,TorU.
ATer releasing the button, all systems are
mo ved into the stored position. S
S
t
to
o w
w ag
ag e ar
e ar eas
eas N
No
ot
tes on loading t
es on loading t he v
he vehicle
ehicle &
D
DAN
AN GER
GER Risk of poisoning from exhaust
ga ses
Combustion engines emit poisonous exhaust
ga ses, such as carbon monoxide. Exhaust
ga ses can enter theve hicle interior if theta il-
ga te is open when theve hicle is running,
especially if theve hicle is in motion. #
Always switch o. theve hicle before
opening theta ilgate. #
Never drive with theta ilgate open. &
W
WARNING
ARNING Risk of injury from unsecured
items in theve hicle
If objects, lug gage or loads are not secured or
not secured su1cient ly,they could slip, tip
ov er or be thro wn around and thereby hit vehi-
cle occupants.
There is a risk of injur y,particular lyin the
eve nt of sudden braking or a sudden change
in direction. #
Always st owobjects in such a wayth at
th ey cannot be thro wn around. #
Before the journe y,secure objects, lug-
ga ge or loads against slipping or tipping
ove r. &
W
WARNI NG
ARNI NGRisk of injury due toobjects
being st owed incor rectly
If objects in theve hicle interior are st owed
incor rectl y,they can slide or be thro wn around
and hit vehicle occupants. In addition, cup
holders, open st owage spaces and mobile
phone brac kets cannot alw aysreta in all
objects they contain. There is a
risk of injur y,particular lyin the
eve nt of braking manoeuvres or abrupt
ch anges in direction. #
Always st owobjects so that they cann ot
be thro wn around in such situations. #
Always make sure that objects do not
pr otru de from st owage spaces, lug gage
nets or st owage nets. #
Close the loc kable st owage spaces
before starting a jou rney. #
Stow and secure objects that are heavy,
hard, poin ted, sharp-edged, fragile or too
lar ge inthe load compartment. &
W
WARNING
ARNING Risk of accident from objects in
th e driver's foot we ll and front-passenger
fo ot we ll
Objects in the driver's foot we ll and front-
passenger foot we ll may impede pedal tr avel or
block a depressed pedal.
This jeopardises the operating and road saf ety
of theve hicle. 116 116
Seats and st
owing

If
th e battery is insu1cient lych arge d, the stand-
ing lights or parking lights will be switched o.
automatically tofacilitate the next engine start.
The exterior lighting (e xcept standing and parking
lights) will switch o. automatically when the driv-
er's door is opened.
R Obser vethe no tes on sur round lighting
(/ page 142).
A
A ut
ut omatic dr
omatic dr iving lights function
iving lights function
When theve hicle is switched on, the standing
lights, low beam and daytime running lights are
switched on automatically depending on the light
conditions. &
W
WARNING
ARNING Risk of accident when the
dipped beam is switched o. in poor visi-
bility
When the light switch is set toà ,the
dipped beam may not be switched on auto-
matically if there is fog, snow or other causes
of poor visibility such as spr ay.#
In such cases, turn the light switch to
L . The automatic driving lights are only an aid.
Yo u
are responsible forve hicle lighting.
Switc Switc hing t
hing t he r
he rear f
ear f og lights on or
og lights on or o.
o.
R
R eq
eq uir
uir ements:
ements:
R The light switch is in theL orà posi-
tion. #
Press the R button.
Please obser vethe count ry-speci/c la wsonthe
use of rear fog lamps.
R
R egulating headlam
egulating headlam p r
p rang
ang e (halog
e (halog en headlam
en headlam ps)
ps)
The headla mprange adjuster all owsyo uto adjust
th e cone of light from the headlamps in relation to
th eve hicle's load condition. g
Driver's seat and front passen ger seat occu-
pied
1 Driver's seat, front passenger seat and rear
seats occupied
2 Driver's seat, front passen ger seat and rear
seats occupied, load compartment laden
3 Driver's seat and front passen ger seat occu-
pied and maximum permissible rear axle load
utilised Light and sight
135
135

Ad
aptive Highbeam Assist Plus automatically
switches between thefo llowing types of light:
R Low beam
R Partial high beam
R High beam
Pa rtial high beam uses the high beam toshine
past other road users rather than dazzling them. The
vehicle in front will be illuminated bythe low
beam.
At speeds greater than 30 km/h:
R If no other road users are de tected, the high
beam will switch on automaticall y.
R Ifot her road users are de tected, the partial
high beam will switch on automaticall y.
At speeds below 25 km/h or when there is su1-
cient street lighting:
R The high beam will switch o. automaticall y.
R The partial high beam will switch o. automati-
cally.
% The system's optical sensor is located behind
th e windscreen near theove rhead control
panel.
Switc
Switc hing A hing A dap
daptiv
tive Highbeam Assis
e Highbeam Assist Plus t Pluson/o.
on/o.
Switc
Switc hing on
hing on #
Turn the light switch totheà position. #
Switch on the high beam using the combina-
tion switch.
When the high beam is switched on automati-
cally in the dar k, the_ indicator lamp will
light up on the central display section of the
inst rument displa y.
Switc
Switc hing hingo.
o. #
Switch o. the high beam using the combina-
tion switch. Se
Se
tting t
tting t he e
he ext
xter
er ior lighting
ior lighting switc
switch-o.
h-o. dela
dela y time
y time R
R
eq
eq uir
uir ements:
ements:
R The light switch is in theà position.
Multimedia system: 4 © 5
Settings 5
Lights
5 Ext. light. del. sw. off #
Set the swit ch-o. delay time.
When theve hicle engine is switched o., the
ex terior lighting will be activated forth e set
time. Light and sight
141
141

Se
Se
tting t
tting t he air dis
he air distr tribution
ibution Multimedia system:
4 Climate menu #
Call up the air conditioning menu
(/ page 154). #
Select a row of seats. #
T
To se
o se t t
t the air dis
he air dis tr
tribution:
ibution: select¯,P
or O. #
Set the air0o w.
% Several air distributions can be selected at
th e same time, e.g. toair-condition bo th the
windscreen and thefo ot we ll.
The ¯ climate control forth e windscreen
can only be selected forth e /rst seat row. Switc
Switc
hing t
hing t he sync
he sync hr
hronisation functiononisation function on/o.
on/o. via
via
t
t he air conditioning contr
he air conditioning contr ol panel
ol panelClimate control can be set centrally using
the syn-
ch ronisation function. The temp erature and air
distribution settings forth e driver's side will be
adop ted automatically forth e front passenger
side. #
Press the0 button.
The synchronisation function will be deactivated if
th e settings for one of theot her climate zones are
ch anged. Switc
Switc
hing t
hing t he sync
he sync hr
hronisation function
onisation function on/o.
on/o.via
via
t
t he multimedia syst
he multimedia syst em
em Multimedia system:
4 Climate menu 5
First row of seats
Climate cont rol can be set centrally using the syn-
ch ronisation function. The driver's settings for
te mp erature, air quantity and air distribution are
adop ted automatically for all climate zones. #
Select SYNCand switch on or o.. Demis
Demisting t
ting the windo ws
he wind ows W
W
indow
indow s mist
s mist ed up on t
ed up on t he inside
he inside #
Press theà button. #
Ifth e windo wscontinue tomist up: press the
¬ button. W W
indow indow s mist
s mist ed up on t
ed up on t he outside
he outside #
Switch on the windscreen wipers. #
Press theà button. Switc
Switc
hing air
hing air -r
-recir
ecir culation mode
culation mode on/o.
on/o. #
Press theg button.
The interior air will be recirculated.
Air-recirculation mode automatical lyswitches to
fresh air mode aTer a while.
% If air-re circulation mode is switched on, the
wind ows may mist up more quickl y.Switch on
ai r-re circulation mode only brie0y. Switc Switc
hing r
hing r esidual heat
esidual heat on/o.
on/o. R R
eq
eq uir
uir ements:
ements:
R theve hicle is par ked.
% Only vehicles with a diesel engine can use
re sidual heat.
It is possible tomake use of there sidual heat
from the engine tocontinue heating or ventilating
th e front compartment of theve hicle for appr ox- Climate control
155 155

Dr
Dr
iving
iving N
No
ot
tes on Mer
es on Mer cedes-
cedes-AMG v
AMG vehicles
ehicles Obser
vethe no tes on thefo llowing additional top-
ics in the Supplement, as you may otherwise fail
to recognise dangers:
R Emotion Start
R AMG exhaust system
R RACE START
R DRIFT MODE
R AMG RIDE CONTROL
R AMG steering-wheel but tons N
No
ot
tes on plug-in h
es on plug-in h ybr
ybrids
ids N
No
ot
tes on plug-in h
es on plug-in h ybr
ybrid oper
id oper ation
ation &
W
W ARNI NG
ARNI NGRisk of chemical burns and poi-
soning from damaged high-voltage battery
If th e housing of the high-voltage battery has
been damaged, electrolyte and gases may
leak out. #
Avoid contact with the skin, eyes or
clo thing. #
Immediate lyrinse electrolyte splashes
o. with water and seek medical atten-
tion straight away. &
D
DAN
AN GER
GER Risk of explosion from excessive
internal pressure of the high-voltage bat-
te ry
Flammable gas may escape and ignite in the
eve nt of a vehicle /re. #
Stop thech arging process immediately
in case of unusual odours, smoke or
burn mar ks. #
Leavethe danger zone immediatel y.
Secure the danger zone at a su1cient
distance. #
Call the /re brigade. The
hybrid system combines a combustion engine
with an electric mo tor. Characteristics when
theve hicle is at a standstill:
R The combustion engine is generally switched
o..
R Idle speed only occurs in cer tain instances.
Characteristics when starting theve hicle:
R Ifth e high-voltage battery is su1ciently
ch arge d, theve hicle can be star ted with the
electric drive without the combustion engine
(noiseless start).
R Ifth e high-voltage battery forth e electrical
drive is not su1ciently charge d or the operat-
ing temp erature of the combustion engine has
not been reached, theve hicle can start with
th e combustion engine.
% Depending on the system, it may happen that
ev en though the high-voltage battery is
ch arge d, electric mode has restric ted or no
av ailabilit y.Once the combustion engine has
been operated for long enough, electric mode
is again available without restriction.
% Tostart the combustion engine, the high-volt-
age battery can be used as a star ter batter y. 162 162
Driving and parking

Characteristics with moderate po
wer output
re qu ests:
R The combustion engine is switched o. as
oTen as possible during the journe y.
R The vehicle can, depending on the drive pro-
gr am selected and the battery charge leve l, be
accelerated electrically up tospeeds of about
140 km/h.
Characteristics with high po wer output requ ests:
R The electric mo tor supports the combustion
engine (boost e.ect), e.g. when pulling away
or accelerating.
R The high-voltage battery is discharging.
Characteristics when releasing the accelerator
pedal during the journe y:
R The electric mo tor is operated as a alternator
when in overrun mode and during braking.
R The high-voltage battery is charging.
No tes on elect ric mode:
R Vehicles with hybrid systems generate signi/-
cant lyless noise when stationary and when being driven
than vehicles with combustion
engines.
R When driving in elect ric mode, theve hicle may
not be heard by otherroad users due tothe
signi/cant lyreduced noise generated.
It is forth is reason that theve hicle is equip-
ped with a sound generator, which ser ves as
an acoustic vehicle warning system (A VAS).
R If not all of theve hicle conditions for electric
mode are met, then the combustion engine is
switched on.
% V
V ehicles wit
ehicles wit h diesel par
h diesel par ticulat
ticulate
e/lt
/lt er
ers:
s: During
th ere ge neration of the diesel particulate /l-
te r,th e drive prog rammes are not available or
are restric ted and the battery charge level
may change.
No tes on the acoustic vehicle warning system:
R The sound generator generates speed-depend-
ent vehicle noise emissions when driving
fo rw ard or backing up at a speed of up to
around 30 km/h. R
This helps other road users, particular ly
pedest rians and cyclists, tohear your vehicle
better.
R When driving at speeds abo ve20 km/h The
ve hicle acoustic warning system gradually
switches o..
R The sound generator is o. when theve hicle is
stationar y.
Manual disconnection of t
Manual disconnection of t he high-v
he high-volt
oltag
age on-
e on-
boar
boar d electr
d electr ical syst
ical syst em
em &
D
DAN
AN GER
GER Risk of dea thand /re due to
modi/ed and/or damaged components of
th e high-voltage on-board electrical sys-
tem
The vehicle's high- voltage on-board electrical
system is under high voltage. If you modify
component parts in theve hicle's high- voltage
on-board electrical system or touch damaged
component parts, you may be electrocuted. In
addition, modi/ed and/or damaged compo-
nents may cause a /re. Driving and parking
163
163

#
T
To switc
o switc h on t
h on the v
he vehicle:
ehicle: press button 1
twice.
Indicator and warning lamps go on in the
inst rument clus ter.
The vehicle is switched o. again if one of thefo l-
lowing conditions is met:
R V
V ehicles wit
ehicles wit h aut h automatic tr
omatic tr ansmission:
ansmission: You do
not start theve hicle within 15 minutes and the
transmission is in position jorthe electric
parking brake is applied.
R V
V ehicles wit
ehicles wit h manual tr
h manual tr ansmission:
ansmission: You do not
start theve hicle within 15 minutes and the
electric parking brake is applied.
R you press button 1once. S
S
t
tar
ar ting t
ting t he v
he vehicle
ehicle S S
t
tar
ar ting t
ting t he v
he vehicle wit
ehicle wit h t
h the st
he st ar
art/st
t/st op butt
op butt on
on &
D DAN
AN GER
GER Risk of fatal injuries caused by
ex haust gases
Combustion engines emit poisonous exhaust
ga ses such as carbon monoxide. Inhaling th
ese exhaust gases is hazardous tohealth
and leads topoisoning. #
Never lea vetheve hicle or, if present, the
stationa ryheater running in an enclosed
space without su1cient ventilation. &
W
WARNI NG
ARNI NGRisk of /re due to0ammable
material in the engine compartment or the
ex haust system
Flammable materials may ignite. #
Therefore, check regula rly th at there are
no 0ammable materials in the engine
compartment or on theex haust system. R
R
eq
eq uir
uir ements:
ements:
R The key is in theve hicle and is recognised. #
V
Vehicles wit
ehicles wit h manual tr
h manual tr ansmission:
ansmission: Depress
th e clutch pedal. #
V Vehicles wit
ehicles wit h aut
h automatic tr
omatic tr ansmission:
ansmission: ShiT
th e transmission toposition jori. #
Depress the brake pedal and press button 1
once. #
Ifth eve hicle does not start: switch o. non-
essential consumers and press but ton1
once. #
Ifth eve hicle still does not start and the dis-
play message Place the key in the marked
space See Owner's Manual appears inthe
inst rument displa y: starttheve hicle with the
ke y in the mar ked space (emer gency ope ra-
tion mode) (/ page 166).
% You can switch o. theve hicle while driving. To
do this, press button 1for about thre e sec-
onds or bypressing button 1thre e times
within thre e seconds. Be sure toobser vethe
saf ety no tes under "Driving tips"
(/ page 169).
Obser veany information rega rding display mes-
sages that can be displ ayed on the inst rument
displa y.
S
S t tar
ar ting t
ting t he v
he vehicle wit
ehicle wit h t
h the ke
he key in t
y in t he mark
he mark ed
ed
space (emerg
space (emerg ency oper
ency operation mode)
ation mode)
If th eve hicle does not start and thePlace the
key in the marked space See Owner's Manual
message appears in the inst rument displa y,you 166 166
Driving and parking

can start
theve hicle in emer gency ope ration
mode. Mar
ked space (e xample with cup holder without
co ver) #
Open the co ver of the mar ked space 2if
necessar y. #
Make sure that the mar ked space 2is
em pty. #
Remo vetheke y1 from theke yring. #
Place theke y1 inthe mar ked space 2on
th e symbol 3.
The vehicle will start aTer a short time.
When youre mo vetheke y1 from the mar ked
space 2,theve hicle can be driven. For fur-
th er engine starts ho wever,theke y1 must
be located in the mar ked space 2onthe
symbol 3during the entire journe y. #
Have theke y1 checked at a quali/ed spe-
cialist workshop.
If t
If t he v
he v ehicle does no
ehicle does no t st
t start:
art: #
Place theke y1 inthe mar ked space 2and
lea veitth ere. #
V
Vehicles wit
ehicles wit h manual tr
h manual tr ansmission:
ansmission: Depress
th e clutch pedal. #
Depress the brake pedal and start theve hicle
using the start/s top button.
% You can switch on the po wer supply or the
ve hicle with the start/s top button. Obser
veany information rega rding display mes-
sages that can be displ ayed onthe inst rument
displa y. S
S
t
t ar
ar ting t
ting t he v
he vehicle via R
ehicle via R emot
emote Online Ser
e Online Ser vices
vices Cooling or heating t
Cooling or heating t
he v
he vehicle int
ehicle int er
erior bef
ior bef ore
ore
st
st ar
ar ting t
ting t he jour
he jour ney
ney
Ensu rethefo llowing before starting the engine:
R The legal stipulations in the area where your
ve hicle is par ked allow engine starting via
smartphone.
R It is safe tostart and runth e engine where
yo ur vehicle is par ked.
R The fuel tank is su1cient lyfull.
R The star ter battery is su1ciently charge d.
Char
Char ging t
ging t he st
he start
art er batt
er batt er
ery bef
y bef or
ore st
e st ar
arting t
ting t he
he
jour
jour ney
ney
Yo u can receive a message on your smartphone
when the state of charge ofthe star ter battery is
lo w. You can then start theve hicle with the smart-
phone tocharge the batter y.The vehicle is auto-
matically switched o. aTer ten minutes. Driving and parking
167
167

Ensure
thefo llowing before starting the engine:
R The legal stipulations in the area where your
ve hicle is par ked allow engine starting via
smartphone.
R It is safe tostart and runth e engine where
yo ur vehicle is par ked.
R The fuel tank is su1cient lyfull.
S
S t
tar
ar ting t
ting t he v
he vehicle (R
ehicle (R emot
emot e Online)
e Online) &
W
WARNING
ARNING Risk of crushing or entrapment
due tounintentional starting of the engine
Limbs could be crushed or trapped if the
engine is star ted unintentionally during service
or maintenance work. #
Always secure the engine against unin-
te ntional starting before ca rrying out
main tenance or repair work. R
R
eq
eq uir
uir ements:
ements:
R Park position jis selected.
R The anti-theT alarm system is not activated.
R The hazard warning light system is switched
o.. R
The bonnet is closed.
R The doors are closed and loc ked.
R The windo wsand sliding sunroof are closed. #
Start theve hicle using the smartphone.
ATer every engine start, the engine runs for
te n minutes.
Yo u can car ryout a maximum of two consecutive
starting attem pts. You must start the engine with
th eke y before trying tostart theve hicle again
with the smartphone.
Yo u can switch o. theve hicle at any time as fol-
lo ws:
R Viath e Smartphone App
R By pressing theÜ orß button on the
key
% Further information can be found in the
smartphone app.
Secur
Secur ing t
ing the v
he vehicle ag
ehicle ag ains
ainst st
t star
arting bef
ting bef or
ore car ry-
e car ry-
ing out maint
ing out maint enance or r
enance or repair w
epair w or
ork:
k: #
Switch on the hazard warning light system.
or #
Unlock the doors.
or #
Open a side window or the sliding sunroof. R
R
unning-in not
unning-in not es
es To
preser vethe engine during the /rst 1,500 km:
R Drive at varying road speeds and engine
speeds.
R Do not drive at speeds greater than
140 km/h.
R Drive theve hicle in drive prog ram A
or ;.
R ShiT tothe next highest gear at theve ry latest
when the needle reaches the last third before
th ere d area in there v counter.
R Do not shiT down manual lyin order tobrake.
R Avoid overstraining theve hicle, e.g. driving at
full thro ttle.
R V
V ehicles wit
ehicles wit h aut
h automatic tr
omatic tr ansmission:
ansmission: do not
depress the accelerator pedal be yond the
pressure point (kickdown). 168
168
Driving and parking

R
Only increase the engine speed gradually and
accelerate theve hicle tofull speed aTer
1,500 km.
This also applies when the engine or parts of the
driv etra in ha vebeen replaced.
Please also obser vethefo llowing running-in
no tes:
R In cer tain driving and driving saf ety sy stems,
th e sensors adjust automatically while a cer-
ta in distance is being driven aTer theve hicle
has been deli vered or aTer repairs. Full sys-
te m e.ectiveness is not reached until the end
of this teach-in process.
R Brakepads, brake disks and tyres that are
either new or ha vebeen replaced only achie ve
optimum braking e.ect and grip aTer se veral
hund red kilometres of driving. Compensate for
th ere duced braking e.ect byapplying greater
fo rc eto the brake pedal. N
No
ot
tes on dr
es on dr iving
iving &
W
WARNING
ARNING Risk of accident due toobjects
in the driver's foot we ll
Objects in the driver's foot we ll may impede
pedal tr avel or block a depressed pedal.
This jeopardises the operating and road saf ety
of theve hicle. #
Stow all objects in theve hicle securely
so that they cannot getinto the driver's
fo ot we ll. #
Always /t the 0oor mats securely and as
prescribed in order toensure that there
is alw ays su1cient room forth e pedals. #
Do not use loose 0oor mats and do not
place 0oor mats on top of one ano ther. &
W WARNING
ARNING Risk of accident due toincor-
re ct foot we ar
Incor rect foot we ar includes, forex ample:
R shoes with plat form soles R
shoes with high heels
R slippers
There is a risk of an accident. #
Alwayswe ar suitable foot we ar so that
yo u can operate the pedals safel y. &
W
WARNI NG
ARNI NGRisk of accident if theve hicle is
switched o. while driving
If yo u switch o. theve hicle while driving,
saf ety functions are restric ted or no longer
av ailable.
This may a.ect the po wer steering system and
th e brake forc e boosting, forex ample.
Yo u will need touse considerably more force
to steer and brake, forex ample. #
Do not switch o. theve hicle while driv-
ing. Driving and parking
169
169