2021 MERCEDES-BENZ A-CLASS HATCHBACK maintenance

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

Diagnos
Diagnos
tics connection
tics connection
The diagnostics connection is a tech nical inter-
fa ce in theve hicle. It is used, forex ample, in the
cont ext of repair and maintenance workor for
re ading out vehicle data in a specialist workshop.
Diagnostic devices should therefore only be con-
nected in a quali/ed specialist workshop. &
W
WARNING
ARNING Risk of accident due tocon-
necting devices tothe diagnostics con-
nection
If yo u connect devices tothe diagnostics con-
nection of theve hicle, the function of vehicle
systems and operating saf ety may be
impaired. #
For saf etyre asons, werecommend that
yo u only use and connect products
appr ovedby yo ur Mercedes-Benz service
centre. &
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. *
N NOOTE
TE Battery discharging from using devi-
ces connected tothe diagnostics connec-
tion Using devices at
the diagnostics connection
drains the batter y. #
Check thech arge leve l of the batter y. #
Ifth ech arge leve l is lo w,charge the bat-
te ry, e.g. bydriving a considerable dis-
ta nce. Please also no
tethe information about the 12 V
battery and short-dis tance trips in the "Driving
and Parking" chap ter (/ page 169). General no
tes
39
39

Connecting and using ano
ther device with the
diagnostics connection can ha vethefo llowing
e.ects:
R Malfunctions in theve hicle system
R Perm anent damage tovehicle components
Please referto thewa rranty term s and conditions
fo rth is matter.
Moreo ver,connecting equipment tothe diagnos-
tics connection can lead toemissions monitoring
information being reset, forex ample. This may
lead totheve hicle failing tomeet there qu ire-
ments of the next emissions inspection during the
main inspection. Quali/ed
Quali/ed
specialis
specialist w
t work
ork shop
shop
A qu ali/ed specialist workshop has the necessary
special skills, tools and quali/cations tocor rectly
car ryout any necessary workon your vehicle.
This particular lyapplies tosaf ety-re leva nt wo rks.
Alw ays ha vethefo llowing workcar ried out on
yo ur vehicle at a quali/ed specialist workshop:
R Safety-re leva nt wo rks R
Service and maintenance work
R Repair work
R Modi/cations as well as installations and con-
ve rsions
R Workon electronic components
R Plug-in h
Plug-in h ybr
ybrid:
id:workon thehy brid system
Mercedes‑Benz recommends a Mercedes‑Benz
service cent re. V
V
ehicle r
ehicle r egis
egistrtration
ation
Mercedes-Benz may ask its service centres to
car ryout tech nical inspections on cer tain vehi-
cles. The quality or saf ety of theve hicle is
impr oved as a result of the inspection.
Mercedes-Benz can only inform you about vehicle
ch ecks if Mercedes-Benz has your registration
data.
It is possible that your vehicle has not yetbeen
re gistered in your name in thefo llowing cases:
R ifyo ur vehicle was not pur chased at an author-
ised specialist deale r. R
ifyo ur vehicle has not yetbeen examined at a
Mercedes-Benz service cent re.
It is advisable toregister your vehicle with a
Mercedes-Benz service cent re.
Inform Mercedes-Benz as soon as possible about
any change in address or vehicle ownership. Yo u
can do this at a Mercedes-Benz service centre,
fo rex ample. Corr Corr
ect use of t
ect use of t he v
he vehicle
ehicle
If yo ure mo veany warning stic kers,yo u or others
could failto recognise cer tain dangers. Lea ve
wa rning stic kers in position.
Obser vethefo llowing information in particular
when driving your vehicle:
R the saf ety no tes in this Owner's Manual, vehi-
cle-speci/c supplements and fu rther supple-
men tary documents
R tech nical data forth eve hicle
R tra1c rules and regulations
R laws and saf etystanda rds per taining tomo tor
ve hicles 40
40
Gene
ral no tes

Inf
Inf
or
ormation on t
mation on t he REAC
he REACH rH regulation
egulation
EU and EFT
EU and EFT A countr
A countries only:
ies onl y:
th e REACH regulation (Regulation (EC) No.
1907/2006, Article 33) stipula tes a duty tosup-
ply information about subs tances of very high
conce rn(SVHCs).
Me rcedes‑Benz AGacts tothe best of its kno wl-
edge toprev ent these SVHCs from being used
and toenable customers tosafely handle these
substances. There are SVHCs known to
Mercedes‑Benz AG, according tosupplier informa-
tion and internal product information, found in
individual components of this vehicle in quantities
of ove r 0.1 percent byweight.
Fu rther information can be obtained at thefo llo w-
ing addresses:
R https://reach.daimler.com/de/home/
R https://reach.daimler.com/en/home/ N
No
ot
tes f
es f or per
or per sons wit
sons wit h electr
h electronic medical aids
onic medical aids
Mercedes-Benz AGcannot, despite carefully
de veloping vehicle systems, comple tely rule out th
e interaction of vehicle systems with elect ronic
medical aids such as ca rdiac pacemake rs.
In addition, there are components installed in the
ve hicle that, rega rdless of the operating status of
th eve hicle, can generate magnetic /elds on a par
with permanent magnets. 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. Gene
ral no tes
41
41

Go
vernmental entities are themsel ves, in individ-
ual cases and within the applicable legal frame-
wo rk, authorised toread out data from theve hi-
cle. In the case of an accident, information that
can help with an in vesti gation can, therefore, be
ta ke n from the airbag control unit, forex ample.
Oper
Oper ational dat
ational dat a in t
a in the v
he vehicle
ehicle
This is data rega rding the operation of theve hicle,
which ha vebeen processed bycont rol units.
This includes thefo llowing data, forex ample:
R vehicle status information such as the speed,
longitudinal acceleration, lateral acceleration,
number of wheel revo lutions or thefa stened
seat belts display
R ambient conditions, su chastemp erature, rain
sensor or distance sensor
Generall y,the use of these data is temp orar y;
th ey will not be stored be yond the period of oper-
ation and will only be processed within theve hicle
itself. Control units oTen contain data memories
fo rve hicle keys,fo rex ample. Their use permits
th ete mp orary or permanent documentation of
te ch nical information about theve hicle's operat- ing state, component loads, main
tenance requ ire-
ments and tech nical events or faults.
Depending on theve hicle equipment, thefo llo w-
ing data are stored:
R operating status of system components, such
as /ll le vels, tyre pressure or battery status
R malfunctions or faults in impor tant system
components, such as lights or brakes
R system reactions in special driving situations,
such as airbag depl oyment or the inter vention
of stability cont rol systems
R information on events leading tovehicle dam-
age
In cer tain cases, it may be requ ired tostore da ta
th at wo uld ha veotherwise been used only temp o-
rari ly. This may be the case if theve hicle has
de tected a malfunction, forex ample.
If yo u use services, such as repair services and
maintenance work, stored operational data as
we ll as theve hicle identi/cation number can be
re ad out and used. They can be read out by
service network emplo yees, such as workshops
and manu facturers or third parties, such as break- down services. The same is true in
the case of
wa rranty claims and quality assurance measures.
In general, there adout is per form ed via the legally
prescribed port forth e diagnostics connection in
th eve hicle. The operational data that are read out
document tech nical states of theve hicle or of
individual components and assist in the diagnosis
of malfunctions, compliance with warranty obli ga-
tions and quality impr ovement. Tothat end, these
data, in particular information about component
loads, tech nical events, malfunctions and other
fa ults may be transmitted along with theve hicle
identi/cation number tothe manufacturer. Fur-
th ermore, the manufacturer is subject toproduct
liability. Forth is reason the manufacturer also
uses operational data from theve hicle, forex am-
ple, forre calls. These data can also be used to
ex amine the customer's warranty and guarantee
claims.
Fa ult memories in theve hicle can be reset by a
service outl etor at your requ est as part of repair
or maintenance work. General no
tes
43 43

#
Foldthe wiper arms back onto the wind-
screen. #
Switch on theve hicle. #
Press theî button on the combination
switch (/ page 145).
The wiper arms will return totheir original
positions. #
Switch o. theve hicle.
% Check the condition of the wiper blades regu-
lar lyand replace them in theev ent of visible
damage or ongoing smearing. Maint
Maint enance display
enance display #
Remo veprotective /lm 1from the mainte-
nance displa yson the tips of the ne wly/tted
wiper blades.
When the colour of the maintenance displa ys
ch anges from black toyello w, replace the wiper
blades. %
The duration until the colour changes varies
depending on the usage conditions. R
R
eplacing t
eplacing t he r
he rear windo
ear windo w wiper blade
w wiper blade &
W
WARNING
ARNING Risk of becoming trapped if the
windscreen wipers are switched on while
wiper blades are being replaced
If th e windscreen wipers begin tomo vewhile
yo u are changing the wiper blades, you can be
trapped bythe wiper arm. #
Always switch o. the windscreen wipers
and vehicle before changing the wiper
blades. R R
emo emo ving t
ving t he wiper blade
he wiper blade #
Switch theve hicle o.. 148
148
Light and sight

Ov
Ov
er
ervie
vie w of climat
w of climat e contr
e control syst
ol systems
ems N
No
ot
tes on climat
es on climat e contr
e control
ol In order
forth e air conditioning system, monitor-
ing of the pollution le vel and air /lt ration tofunc-
tion co rrectl y,an interior air /lter must alw ays be
used. Make sure that the /lter is installed cor-
re ctl y.Use /lters recommended and appr oved by
Mercedes-Benz. Alw ays ha vemaintenance work
car ried out at a quali/ed specialist workshop. Ov
Ov
er
ervie
vie w of t
w of t he air conditioning contr
he air conditioning contr ol panel
ol panel The indicator lamps on
the buttons indicate that
th e cor responding function is activated. THERM
ATIC air conditioning cont rol panel with sta-
tionary heater (e xample)
1 q Setsthete mp erature on the driver's
side
2 Vehicles with THERM ATIC or THERM OTRO NIC
operating unit with stationary heater: A
calls up the air conditioning menu
Ve hicles with THERM OTRO NIC operating unit
without stationary heater: _setsthe air
distribution
3 H Setsthe air0ow or switches o. climate
control
4 Ã Sets climate control toautomatic mode
(/ page 154) 5
¬ Demists the windscreen
6 ¤ Switches there ar wind owheater on/o.
7 g Switches air-recirculation mode on/o.
(/ page 155)
8 Vehicles with THERM ATIC operating unit
(with/wi thout stationary heater):
¿ switches A/C function on/o.
(/ page 154)
Ve hicles with THERM OTRO NIC operating unit
(with/wi thout stationary heater): Á
switches A/C function on/o. (/ page 154)
Switches residual heat on/o. (/ page 155)
9 Vehicles with THERM ATIC or THERM OTRO NIC
control panel with stationary heater: &
swit ches stationary heater on/o.
(/ page 159)
Ve hicles with THERM OTRO NIC operating unit
without stationary heater: 0switches syn-
ch ronisation on/o. (/ page 155)
Plug-in hybrid with THERMATIC or
THERMOTRONIC operating unit: &
switches "Immediate pre-ent ryclimate con-
trol" on/o. (/ page 158) Climate cont
rol
153
153

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