battery MERCEDES-BENZ A-CLASS HATCHBACK 2021 User Guide

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

&
W
WARNI NG
ARNI NGRisk of accident due tomis-
judgement of distance when using the
outside mir ror
The outside mir rors re0ect objects on a
smaller scale. The objects in vi eware in fact
closer than they appear. #
Therefore, alw ays look overyo ur shoul-
der in order toensure that you are aware
of the actual distance between you and
th ero ad users driving behind you. #
T To f o f old in or out:
old in or out: brie0y press button 2. #
T
T o set: o set: press button 1or3 toselect the
outside mir rorto be adjus ted. #
Use button 4toadjust the position of the
mir ror glass.
% Ifth e battery has been disconnected or com-
ple tely dischar ged, you will ha vetoreset the outside mir
rors. Only then will the automatic
mir rorfo lding function workproper ly. #
T
T o r o r eset:
eset: brie0y press button 2.
An outside mir rorth at has been pushed out of
position can be engaged in position again as fol-
lo ws: #
V
Vehicles wit
ehicles wit hout electr
hout electr icall
ically f
y folding outside
olding outside
mirr
mirr or
ors:
s: manually mo vethe outside mir ror into
th e cor rect position. #
V Vehicles wit ehicles wit h electr
h electricall
ically f
y folding outside mir-
olding outside mir-
r
r ors
ors: press and hold button 2.
Yo u will hear a click and the mir ror will audibly
click into place. The outside mir ror will now be
set tothe cor rect position. A
A
ut
ut omatic anti-dazzle mirr
omatic anti-dazzle mirr or
ors function
s function &
W
WARNING
ARNING Risk of acid burns and poison-
ing due tothe anti-dazzle mir ror electro-
ly te
Electrolyte may escape if the glass in an auto-
matic anti-dazzle mir ror breaks. 150
150
Light and sight

imately 30 minutes, depending on
thete mp era-
ture set. #
T
To activ
o activ at
ate:
e: press the Á button.
Re sidual heat will be switched o. automaticall y.Pr
Pr
e-entr
e-entr y climat
y climat e contr
e control using t
ol using t hekey
he key F
F
unction of pr
unction of pr e-entr
e-entry climat
y climat e contr
e control using t
ol using t he
he
key
key
Before entering theve hicle, the driver's seat area
or the whole vehicle interior can be brie0y pre-
wa rmed or pre-cooled.
When pre-cooling, thefo llowing functions are acti-
va ted as needed:
R Automatic climate control
R Blower
R Seat ventilation
When pre-heating, thefo llowing functions are acti-
va ted as needed:
R Automatic climate control
R Blower
R Seat heater R
Steering wheel heater
R Mirror heater
R Rear wind owheater
Se
Se tting pr tting pr e-entr
e-entry climat
y climat e contr
e control via t
ol via thekey
he key
Multimedia system:
4 Climate menu 5
Pre-entry climate ctrl
Switc
Switc hing
hingon/o.
on/o. #
Select Z. #
Select Pre-entry climate control via key.
Switc
Switc hing pr
hing pr e-entr
e-entry climat
y climat e contr
e control via t
ol via thekey
he key
on/o.
on/o.
R R eq
eq uir
uir ements:
ements:
R The high-voltage battery is charge d su1-
cient ly.
R The function has been activated via the multi-
media system. #
T
T o switc
o switc h on:
h on:unlock theve hicle.
The climate cont rol functions are activated for
up to/ve minutes for pre-heating and pre-
cooling. Pre-entry climate control via
theke y cann otbe
activated more than twice when theve hicle is
switched o.. #
T
To switc
o switc h
h o.:
o.: push the& button up or
down.
The following functions will remain active once the
ve hicle has been star ted:
R Seat heating
R Seat ventilation Pr
Pr
e-entr
e-entr y climat
y climat e contr
e control at depar
ol at depar tur
ture time
e time Pr
Pr
e-entr
e-entr y climat
y climat e contr
e control f
ol f or depar
or depar tur
ture time func-
e time func-
tion
tion &
W
WARNI NG
ARNI NGRisk of fatal injury due toexpo-
sure toextreme heat or cold in theve hicle
If persons, particular lych ildren, are subjected
to prolonged exposure tointense heat or cold,
th ere is a risk of se vere injury or even death. #
Never lea vepersons, particular lych il-
dren, unattended in theve hicle. 156
156
Climate cont
rol

The
vehicle interior can be air conditioned when
th eve hicle is par ked.
When theve hicle is connected topowe r supply
equipment, priority is given tocharging the high-
vo ltage battery toa speci/ed minimum charge.
The running time of pre-entry clima tecont rol may
be reduced under thefo llowing conditions:
R The vehicle is not connected topowe r supply
equipment.
R The high-voltage battery is not charge d su1-
cient ly.
Wi th active pre-ent ryclimate cont rol,th ech arge
le ve l of the high-voltage battery may be reduced,
ev en if thech arging cable connector is connec-
te d.
Fo r cooling, thefo llowing functions are activated
as needed:
R Automatic climate control
R Blower
R Seat ventilation Fo
r heating, thefo llowing functions are activated
as needed:
R Automatic climate control
R Blower
R Seat heating
R Steering wheel heater
R Mirror heater
R Rear wind owheater
Se
Se tting pr
tting pr e-entr
e-entry climat
y climat e contr
e control f
ol f or depar
or depar ture
ture
time
time
Multimedia system:
4 Climate menu 5
Pre-entry climate ctrl
Se Se tting a single depar
tting a single depar tur
tur e time
e time #
Select ONCE. #
Set a departure time.
Changing t
Changing t he activ
he active depar
e departur
ture time
e time #
Select the pen icon next tothe displa yed
departure time. #
Set a departure time. Se
Se
tting t
tting t he w
he week
eekpr
pro/le
o/le #
Select WEEK PROFILE . #
Set the desired departure times, e.g. every
day at 8 a.m.
Selecting t
Selecting t he zone
he zone #
Select Z. #
Select Driver's seat only.
If th eDriver's seat only setting is deactivated,
pre-entry climate control take s place forthe
entire vehicle.
A
A ctiv
ctiv ating/deactiv
ating/deactiv ating pr
ating pre-entr
e-entry climat
y climat e contr
e control
ol
f
f or depar
or depar tur
tur e time
e time
R
R eq
eq uir
uir ements:
ements:
R The high- voltage battery is charge d su1-
cient ly.
R The function has been activated via the multi-
media system. #
T
To activ
o activ at
ate:
e: set the departure time
(/ page 157).
Pre-entry climate control for departure time
switches on a maximum of 55 minutes before
th e selected departure time. It will remain Climate control
157 157

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

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

*
N
N O
OTE
TE Damage tothe driv etra in and
engine when pulling away #
Do not warm upthe engine while the
ve hicle is stationar y.Pull away immedi-
atel y. #
Avoid high engine speeds and driving at
full thro ttle until the engine has reached
its operating temp erature. *
N
NO OTE
TE Damage tothe catalytic con verter
due tonon-combusted fuel The engine is not
running smoo thly and is mis-
/ring.
Non-combus ted fuel may getinto the catalytic
con verter. #
Only depress the accelerator pedal
slightl y. #
Have the cause recti/ed immediately at
a qu ali/ed specialist workshop. *
N NOOTE
TE Reduced battery life due tofrequent
short-distance trips The 12 V battery may not be su1cien
tly
ch arge d when theve hicle is used only for
short-dis tance trips. This reduces the life of
th e batter y. #
Drive longer distances regula rly to
ch arge the batter y. *
N
NO
OTE
TE Damage totheve hicle due tonot
observing the maximum permitted head-
ro om clearance If
th eve hicle height is greater than the maxi-
mum permitted headroom clearance, thero of
and other parts of theve hicle may be dam-
aged. #
Obser vethe signposted headroom clear-
ance. #
Ifth eve hicle height is greater than the
permitted headroom clearance, do not
enter. #
Obser vethech anged vehicle height with
add-on roof equipment. N No
ot
tes on dr
es on dr iving wit
iving with a r
h a roof load, tr
oof load, tr ailer or fully
ailer or fully
laden v
laden v ehicle
ehicle
When driving with a loaded roof luggage rack or
trailer as well as with a fully laden or fully occu-
pied vehicle, theve hicle's driving and steering
ch aracteristics change.
Yo u should bear thefo llowing in mind:
R Do not exceed the permissible roof load and
to wing capacity. Also obser vethete ch nical
data in the printed Owner's Manual.
R Evenly distribute thero of load, and place
heavy objects at the bottom. Also comply with
th e no tes on loading theve hicle
(/ page 116).
R Drive attentivel y,and avoid suddenly pulling
awa y,braking and steering as well as rapid
cornering.
Not
Not es on dr
es on dr iving on salt-tr
iving on salt-tr eat
eated r
ed r oads
oads
The braking e.ect is limited on salt-treated roads. Driving and parking
171
171

EC
EC
O displa
O displa y function
y function The ECO display summarises
your driving charac-
te ristics from the start of the journey toits com-
pletion and assists you in achieving the most eco-
nomical driving style.
Yo u can in0uence consum ption bydoing thefo l-
lowing:
R driving with particular care.
R V Vehicles wit
ehicles wit h aut
h automatic tr
omatic tr ansmission:
ansmission: driving
in drive prog ram ;.
R V
V ehicles wit
ehicles wit h manual tr
h manual tr ansmission:
ansmission: driving in
drive prog ram A.
R following thege arshiT recommendations. The lettering in
the segment will light up brightl y,
th e outer edge will light up and the segment will
/ll up when thefo llowing driving style is adop ted:
R 1 Steady speed
R 2 Gentle deceleration and rolling
R 3 Moderate acceleration
The lettering in the segment will be grey ,th e outer
edge will be dark and the segment will em pty
when thefo llowing driving style is adop ted:
R 1 Fluctuations in speed
R 2 Heavy braking
R 3 Sporty acceleration
The ECO display will show you when you ha ve
driven economicall y:
R The thre e segments will /ll up comple tely at
th e same time
R The edges around all thre e segments will light
up
The additional range achie ved as a result of your
driving style in comparison with a driver with a
ve ry sporty driving st yle will be shown in thecent
reof display 4. Therange displa yed does
not indicate a /xed reduction in consum ption. R R
eg
eg ener
ener ativ
ative br
e br ak
ake syst
e syst em (plug-in h
em (plug-in h ybr
ybrid)
id) F F
unction of t unction of t he r
he recuper
ecuper ativ
ative br
e br ak
ake syst
e syst em
em
Depending on the selected recuperation le vel,the
electric mo tor is operated as an alternator when
in ove rrun mode and during braking in order to
ch arge the high-voltage battery while driving. As
soon as youre lease the accelerator pedal when
th eve hicle is in motion, recuperation in overrun
mode is initiated.
The higher there cuperation, the more sharply the
ve hicle is braked when coasting and the more
electrical energy is fed into the high-voltage bat-
te ry.
The rege nerative brake system has thefo llowing
ch aracteristics:
R supports braking with elect ronically cont rolled
brake force boosting
R con verts th e kinetic energy of theve hicle into
elect ric energy 174 174
Driving and parking

%
Ifyo u brake hard, the mechanical brake is
also used. This means that the maximum
re cuperative energy cannot be reco vered. The
more you drive and brake in an anticipatory
manner, the more e1cient lyenergy can be
re cuperated.
Syst
Syst em limits
em limits
The braking e.ect of the electric mo tor during
re cuperation in overrun mode may be reduced or
may not be available at all in thefo llowing situa-
tions:
R when the high-voltage battery charge level
increases
R ifth e high-voltage battery is not yet at a nor-
mal operating temp erature
R when driving at speeds close tozero
R in transmission position i
R during and aTer ESP ®
inter venes
In these cases, the desired deceleration is set by
th e brake control system. Also brake with the
service brake if necessar y. Manuall
Manuall
y se
y setting r
tting r ecuper
ecuper ativ
ative deceler
e deceler ation
ation
% IntheÎ drive prog ram, you can use the
stee ring wheel gearshiT paddles tomanually
adjust the intensity of recuperation in overrun
mode. %
When theve hicle is star ted again or transmis-
sion position his engaged again, the stand-
ard setting is automatically set.
The following recuperation le vels are available:
R hà Intelligent, anticipa tory recuperation
with ECO Assist (standard setting)
(/ page 176)
R hq Norecuperation: theve hicle rolls freely R
h Normal recuperation
R h± Increased recuperation; st rong deceler-
ation in overrun mode, e.g. for driving on
downhill gradients
R h±± Maximum recuperation: maximum
decele ration in overrun mode #
T
To incr
o incr ease r
ease r ecuper
ecuper ation:
ation:brie0y pull gearshiT
paddle 1. #
T
To r
o r educe r
educe r ecuper
ecuperation:
ation:brie0y pull gearshiT
paddle 2. #
S
St
tandar
andar d se
d setting:
tting: pull and hold gearshiT pad-
dle 1 or2 or engage transmission position
h again. Driving and parking
175
175