2021 MERCEDES-BENZ A-CLASS HATCHBACK fuel

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
% 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 Tailgate
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 166). Opening and closing
83
83

Centr
Centr
all
ally loc
y loc king and unloc
king and unloc king t
king the v
he vehicle fr
ehicle fr om
om
t
t he inside
he inside #
T
To unloc
o unloc k:
k:press button 1. #
T
To loc
o loc k:
k:press button 2.
The red indicator lamp on button 2lights up
once theve hicle is loc ked.
This does not lock or unlock the fuel /ller 0ap. Plug-in h
Plug-in h ybr
ybrid:
id:the soc ket 0ap is also loc ked and
unloc ked. The soc ket 0ap can be opened even if a
ke y is de tected in the car.
The vehicle is not unloc ked:
R ifyo u ha veloc kedth eve hicle using thekey
R ifyo u ha veloc kedth eve hicle using KEYLESS-
GO Loc
Loc
king/unloc
king/unloc king t
king the v
he v ehicle wit
ehicle wit h KEYLESS-GO
h KEYLESS-GO R
R
eq
eq uir
uir ements:
ements:
R The key is outside theve hicle.
R The dis tance between theke y and theve hicle
does not exceed 1 m.
R The driver's door and the door on which the
door handle is used are closed.
* NO
NOTE
TEVehicle damage due touninten-
tional opening of theta ilgate R
when using an automatic car wash
R when using a high pressure cleaner #
Deacti vate the function of theke y in
th ese situations.
or #
Make sure that theke y is at a minimum
dis tance of 3 m away from theve hicle. Obser
vethe no tes:
R onwashing theve hicle in a car wash
(/ page 337)
R on using a high pressure cleaner
(/ page 339) Opening and closing
87 87

Switc
Switc
hing t
hing t he st
he stationar
ationar y heat
y heater/v
er/ventilation
entilation on/o.
on/o.
via t
via t he oper
he oper ating unit
ating unit &
D
DAN
AN GER
GER Risk of fatal injury due topoison-
ous exhaust gases
If th eta ilpipe is bloc ked or su1cient ventila-
tion is not possible, poisonous exhaust gases
such as carbon monoxide may enter theve hi-
cle. This is the case in enclosed spaces or if
th eve hicle gets stuck in sno w,forex ample. #
Always switch the stationary heater o. in
enclosed spaces without an air extrac-
tion system, e.g. in garage s. #
Keep theta ilpipe and the area around
th eve hicle free from snow when the
ve hicle or the stationary heater is run-
ning. #
Open a wind owonthe side of theve hicle
fa cing away from the wind toensure an
adequate supply of fresh air. &
W
WARNING
ARNING Risk of /re due tohot station-
ary heater components and exhaust gases
Flammable materials such as lea ves, grass or
twigs may ignite. #
When the stationary heater is switched
on, make sure that:
R hot vehicle parts do not come into
contact with 0ammable materials.
R theex haust gas can 0ow out of the
stationa ryheater exhaust pipe unhin-
dered.
R theex haust gas does not come into
contact with 0ammable materials. *
N
NOOTE
TE Bat tery dischar gecaused bysta-
tionar y heater or stationaryventilation
ope ration Operating
the stationary heater or stationary
ve ntilation drains the batter y. #
ATer heating or ventilating theve hicle
twice, drive for a longer period of time. R
R
eq
eq uir
uir ements:
ements:
R The fuel tank is at least Õfull. #
Set the desired temp erature using thew
button. #
Press button 1.
The red or blue indicator lamp on button 1
will light up or go out. Climate control
159
159

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

*
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

The Instrument Display sh
ows cur rently set recu-
peration le vel1, forex ample, hÃ. Eco Assis
Eco Assis
t function (plug-in h
t function (plug-in h ybr
ybr id)
id) %
The following function is countr y-dependent
and available only in conjunction with an inte-
gr ated hard drive navigation system.
ECO Assist is active only in drive prog rams A,
Î, Ïand;, and only in transmission
positions horhÃ. Perm anent manual gear-
shiTing pmust be switched o. (/ page 185).
ECO Assist anal yses data forth eve hicle's expec-
te dro ute. This allo ws the system tooptimally
adjust the driving style forth ero ute ahead, sa ve
fuel and recuperate.
ECO Assist is displa yed on theAssistance
menu(/ page 279). 1
Event ahead, e.g. roundabout
2 Distance display forth eev ent ahead
3 "Foot o. the accelerator" prom pt Displa
yable pr evious events 1 The
following events 1can be de tected and dis-
pla yedfo rth ero ute section ahead:
R Vehicle in front
R Speed limit
R Downhill and uphill gradients
R Junctions and roundabouts
R Bends
The segments of dis tance display 2show the
distance totheeve nt ahead as follo ws:
R Afew segments light up: theeve nt ahead is
near.
R Many segments light up: theev ent ahead is
fur ther awa y.
If ECO Assist is acti ve,th e "Foot o. the accelera-
to r" symbol 3will appear on the inst rument dis-
play and on the head-up display beside the trans-
mission position displa y.
When theve hicle nears an event, ECO Assist will
calculate the optimal speed for minimal energy
consum ption based on the distance, speed and
gr adient. The "Foot o. the accelerator" symbol 3
will appear on the inst rument displa y. 176
176
Driving and parking