transmission MERCEDES-BENZ A-CLASS SALOON 2021 Service Manual

Bluet
Bluet
ooth
oo th®
®
connection:
connection:
The menu view and theav ailable functions in the
te lephone menu are in part dependent on the
Blue tooth ®
pro/le of the connected mobile
phone. Full functionality is only available if the
mobile phone supports bo thofthefo llowing Blue-
to oth ®
pro/les:
R PBAP (Phone Book Access Pro/le)
- The contacts on the mobile phone are
shown automatically on the multimedia
system.
R MAP (Message Access Pro/le)
- The mobile phone message functions can
be used on the multimedia system.
Ir re specti veofthis, Blue tooth ®
audio functionality
can byused with any mobile radio unit.
Fo r information on thera nge of functions of the
mobile radio unit tobe connected, see the manu-
fa cturer's operating instructions.
Ne
Ne tw
twor
ork connection:
k connection: The
following cases can lead tothe call being dis-
connected while theve hicle is in motion:
R You switch into a transmission/reception sta-
tion, in which no communication channel is
free.
R The SIM card used is not compatible with the
network available
R A mobile phone with "Twincard" is log ged into
th e network with the second SIM card at the
same time
The multimedia system supports calls in HD
Vo ice ®
for impr oved speech qualit y.Arequ ire-
ment forth is is that the mobile phone and the
mobile phone network pr ovider of the person you
are calling support HD Voice ®
.
Depending on thequ ality of the connection, the
vo ice quality may 0uctuate.
Fu rther information can be obtained from a
Mercedes-Benz service cent reor at: https://
www.mercedes-benz.com/connect MBUX multimedia system
303 303

This will contact
youto con/rm the appoint-
ment and if necessary consult about the
de tails.
% Ifyo u select LateraTerthe service message
appears, the message is hidden and reap-
pears at a later time.
Giving consent t
Giving consent t o dat
o data tr
a transf
ansf er dur
er dur ing a Mer
ing a Mer cedes
cedes
me call
me call
R R eq
eq uir
uir ements:
ements:
R There is an active Mercedes me call via the
multimedia system or the me button in the
ove rhead control panel (/ page 305).
% The prom pttocon/rm data transfer does not
appear in all count ries.
If th eAc cident and Breakdown Management ser v-
ices are not activated on Mercedes me, theDo
you want to transmit vehicle data and the vehi-
cle's position to the Mercedes-Benz Customer
Centre in order to improve the processing of
your request? message is shown.#
Select Yes.
Re leva nt identi/cation data is transmitted
automaticall y. More information on Mercedes me: https://
ww w.mercedes.me
T
T r ransf
ansf err
erred dat
ed dat a dur
a during a Mer
ing a Mer cedes me call
cedes me call
When you make a service call via Mercedes me,
data is transmitted. This enables targ eted advice
and a smoo thservice.
The following requ irements must be ful/lled for
th e transfer of the data:
R The vehicle is switched on.
R The required da tatransfer tech nology is sup-
por tedby the mobile phone network pr ovider.
R The quality of the mobile connection is su1-
cient.
Multi-s tage transfer depends on thefo llowing fac-
to rs:
R Reason forth e initiation of the call
R The available mobile phone transmission tech-
nology.
R The activated Mercedes me connect services.
R The service selected in thevo ice control sys-
te m. %
A prom ptfor consent tothe data transmission
only occurs if the cor responding Mercedes
me connect service is not activated.
Dat
Dat a tr
a transf
ansf er if Mer
er if Mer cedes me connect ser
cedes me connect ser vices
vices
ar
ar e no
e no t activ
t activ at
ated
ed
If no Mercedes me connect services are activated
and the data pr otection prom pthas been con-
/rmed thefo llowing data is transmitted:
R Vehicle identi/cation number
R Time of the call
R Reason forth e initiation of the call
R Con/ rmation of the data pr otection prompt
R Country indicator of theve hicle
R Set language forth e multimedia system
R Telephone number of the communication plat-
fo rm installed in theve hicle
If a call is made for a service appointment via the
service reminder, thefo llowing data is also trans-
mitted:
R Current mileage and maintenance data 308
308
MBUX multimedia system

%
Websites cannot be shown while theve hicle is
in motion. Ov
Ov
er
ervie
vie w of smar
w of smar tphone int
tphone int egr
egration
ation Wi
th Sma rtphone Integ ration, you can use cer tain
functions on your mobile phone via the multime-
dia system displa y.
Only one mobile phone at a time can be connec-
te d via Smartphone Integ ration tothe multimedia
system. Also for use with two phone mode with
smartphone integ ration, only one additional
mobile phone can be connec ted using Blue tooth ®
with the multimedia system.
The full range of functions for Smartphone Inte-
gr ation is only possible with an Internet connec-
tion. The appropriate application must be down-
loaded on the mobile phone touse Smartphone
Integ ration. The mobile phone must be switched
on and connec tedto a USB port with theç
symbol on the multimedia system using a suitable
cable.
Apps for Smartphone Integ ration
R Apple CarPlay ® R
Android Auto
% For saf etyre asons, the /rst activation of
Smartphone Integ ration on the multimedia
system must be car ried out when theve hicle
is stationary and the parking brake is applied.
Yo u can start Apple CarPlay ®
or Android Auto
from the device manager.
% Mercedes-Benz recommends disconnecting
th e connecting cable only when theve hicle is
stationar y.
Ov
Ov er ervie
vie w of tr
w of tr ansf
ansferr
erred v
ed v ehicle data
ehicle data
When using Smartphone Integ ration, cer tain vehi-
cle data is transfer redto the mobile phone. This
enables youto get the best out of selected mobile
phone services. Vehicle data is not directly acces-
sible.
The following system information is transmitted:
R SoTware release of the multimedia system
R System ID (anonymised)
The transfer of this data is used tooptimise com-
munication between theve hicle and the mobile
phone. To
do this, and toassign se veralve hicles tothe
mobile phone, a vehicle identi/er is random lyge n-
erated.
This has no connection totheve hicle identi/ca-
tion number (VIN) and is dele ted when the multi-
media system is reset (/ page 292).
The following driving status data is transmitted:
R Transmission position engaged
R Distinction between par ked, standstill, rolling
and driving
R Day/night mode of the inst rument clus ter
R Drive type
The transfer of this data is used toalter how con-
te nt is displa yedto cor respond tothe driving sit-
uation.
The following position data is transmitted:
R Coordinates
R Speed
R Compass direction
R Acceleration direction MBUX multimedia system
313 313

R
Keep awa y from /re and naked 0ames.
R Do not lean overth e batter y.
Obser vethe additional following points when
ch arging the batter y:
R Only use battery charge rs tested and
appro vedfo r Mercedes-Benz.
R Read the battery charge r's operating inst ruc-
tions before charging the batter y.
Obser vethe additional following points during
starting assistance:
R For starting assistance, only use batteries with
a nominal voltage of 12 V.
R The vehicles must not touch.
R P
P e
etr
tr ol engine:
ol engine: only accept starting assistance
if th e engine and exhaust system are cold. S
S
t
tar
ar ting assist
ting assist ance and c
ance and c har
harging t
ging t he 12 V batt
he 12 V batt ery
ery R
R
eq
eq uir
uir ements:
ements:
Plug-in h
Plug-in h ybr
ybrid:
id:in order tostart, theve hicle
re qu ires a su1cient charge leve l of the high-volt- age battery as
well as a su1cient po wer output of
th e 12 V on-board electrical system.
R The vehicle is secured with the electric par k-
ing brake.
R A
A ut
ut omatic tr
omatic tr ansmission:
ansmission: the transmission is in
position j.
R Manual tr
Manual tr ansmission:
ansmission: the transmission is in
neutral.
R The vehicle and all elect rical consume rsare
switched o..
R The bonnet is open. #
Slide co ver1 of positive clamp 2onthe
jump-starting connection point in the direction
of the ar row. #
Connect positive clamp 2onyour vehicle to
th e positive pole of the donor battery using
th e jump lead/charging cable. Alw ays begin
with positive clamp 2onyour ow nve hicle
/rst. 352
352
Breakdown assis
tance

T
T
o
o w
w -st
-st ar
arting or to
ting or towing away
wing away P
P
er
er mitt
mitt edto
ed towing met
wing met hods (non plug-in h
hods (non plug-in h ybr
ybrid)
id) Mercedes-Benz
recommends transporting your
ve hicle in the case of a breakdown, rather than
to wing it away.
Fo rto wing, use a tow rope or tow bar with bo th
axles on thegr ound. Do not use tow bar systems. &
W
WARNING
ARNING Risk of accident when towing
with steering wheel lock
If th e steering wheel lock is engaged, you will
not be able tosteer theve hicle. #
When towing with a tow rope or tow bar,
alw ays switch on theve hicle. *
N
NOOTE
TE Damage totheve hicle due to tow-
ing awa y incor rectly #
Obser vethe inst ructions and no tes on
to wing away. P
P
er
er mitt
mitt edto
ed towing met
wing met hods
hods V
V
ehicle eq
ehicle eq uipment/to
uipment/to wing met
wing method
hod Bot
Bot
h axles on t
h axles on t hegr
he ground
ound F
F
r
ront axle r
ont axle r aised
aised R
R
ear axle r
ear axle r aised
aised
Ve hicles with manual transmission Yes, maximum 50 km at 50 km/h Yes, maximum 50 km at 50 km/h Yes, maximum 50 km at 50 km/h
Ve hicles with automatic transmis-
sion Ye
s, maximum 50 km at 50 km/h Yes, maximum 50 km at 50 km/h Yes, maximum 50 km at 50 km/h
4MATIC vehicles Yes, maximum 50 km at 50 km/h No No354
354
Breakdown assis
tance

In
thefo llowing situations, only transporting the
ve hicle is permitted:
R the multifunction display is not working
or
R theá Towing not permitted See Owner's
Manual display message appears
Ex
Ex cep
cep tion:
tion: ifth eve hicle is located in a danger
zone, it can be reco vered from the danger zone
despite the display message or the display not
wo rking.
It must not be towe d fur ther than 50 m with bo th
axles on thegr ound. A towing speed of 10 km/h
must not be exceeded. Be yond these limits, only
transporting is permitted. T
T
o
o wing t
wing t he v
he vehicle wit
ehicle wit h bot
h both axles on t
h axles on t hegr
he ground
ound #
Obser vethe no tes on the permitted towing
me thods (/ page 354). #
Plug-in hybrid: obser vethe no tes on the per-
mitted towing me thods (/ page 355). #
Make sure that the battery is connected and
ch arge d. Obser
vethefo llowing points when the battery is
dischar ged:
R theve hicle cann otbe star ted
R the electric parking brake cannot be released
or applied
R V
V ehicles wit
ehicles wit h aut
h automatic tr
omatic tr ansmission:
ansmission: the
transmission cannot be shiTed toposition i
or j.
% V
Vehicles wit
ehicles wit h aut
h automatic tr
omatic tr ansmission:
ansmission: ifthe
transmission cannot be shiTed toposition i
or if the display does not show anything,
transport theve hicle (/ page 357). A towing
ve hicle with liTing equipment is requ ired for
ve hicle transpo rtation.
* NO
NOTE
TE Damage due to towing away at
ex cessively high speeds or over long dis-
ta nces The driv
etra in could be damaged when towing
at excessively high speeds or over long distan-
ces. #
Atowing speed of 50 km/h must not be
ex ceeded. #
Atowing dis tance of 50 km must not be
ex ceeded. &
W
WARNING
ARNING Risk of accident when towing a
ve hicle which is too heavy
If th eve hicle tobe tow- star ted or towe daway
is heavier than the permissible gross mass of
yo ur vehicle, thefo llowing situations can
occur:
R theto wing eye may become de tach ed.
R theve hicle/trailer combination may
swer veorove rturn. #
Before tow- starting or towing away,
ch eck if theve hicle tobe tow- star ted or
to we dawa yex ceeds the permissible
gr oss mass. If a
vehicle must be tow- star ted or towe dawa y,its
permissible gross mass must not exceed the per-
missible gross mass of theto wing vehicle. 356
356
Breakdown assis
tance

#
Information on the permissible gross mass of
th eve hicle can be found on theve hicle identi-
/cation plate (/ page 384). #
V
Vehicles wit
ehicles wit h aut
h automatic tr
omatic tr ansmission:
ansmission: do not
open the driver's door or front passenger
door; the transmission otherwise automati-
cally shiTs toposition j. #
Fitth eto wing eye (/ page 359). #
Fasten theto wing device.
* N
NOOTE
TE Damage due toincor rect connec-
tion of theto w bar #
Only connect theto w rope or tow bar to
th eto wing eyes. #
Deactivate the automatic locking mechanism
(/ page 88). #
Do not activate the HOLD function. #
Deactivate tow- awa y protection
(/ page 102). #
Deactivate Active Brake Assist (/ page 239).#
V
Vehicles wit
ehicles wit h aut
h automatic tr
omatic tr ansmission:
ansmission: shiTto
position i. #
V
Vehicles wit
ehicles wit h manual tr
h manual tr ansmission:
ansmission: shiTto
neutral i. #
Release the electric parking brake. #
Switch on theve hicle; the steering wheel loc k-
ing may otherwise engage. &
W
WARNING
ARNING Risk of accident due tolimited
saf ety-re lated functions during theto wing
process
Saf ety-re lated functions are limited or no lon-
ge rav ailable in thefo llowing situations:
R theve hicle is switched o..
R the brake system or po wer steering system
is malfunctioning.
R the energy supply or the on-board electri-
cal system is malfunctioning.
When your vehicle is towe daw ay, signi/cantly
more e.ort may be requ ired tosteer and
brake than is normally requ ired. #
Use a tow bar. #
Make sure that the steering wheel can
mo vefreely be fore towing theve hicle
awa y. *
N
NO
OTE
TE Damage due toexcessive tractive
po wer If
yo u pull away sharpl y,the tractive po wer
may be too high and theve hicles could be
damaged. #
Pull away slo wlyand smoo thly. Loading t
Loading t
he v
he vehicle f
ehicle f or tr
or transport
anspo rt Hybr
Hybr
id v
id vehicles:
ehicles: transpor tation of vehicles should
only be car ried out byprofessional reco very com-
panies. #
Obser vethe no tes on towing away
( / page 356). #
Connect theto wing device totheto wing eye
in order toload theve hicle.
% You can also attach theto w bar tothe trailer
hitch. Breakdown assistance
357
357

#
V
Vehicles wit
ehicles wit h aut
h automatic tr
omatic tr ansmission:
ansmission: shiTthe
automatic transmission toposition i.
% V
V ehicles wit
ehicles wit h aut
h automatic tr
omatic tr ansmission:
ansmission: the
automatic transmission may be loc ked in posi-
tion jintheev ent of damage tothe electri-
cal system. ToshiT toi , pr ovide the on-
board electrical system with po wer
( / page 352). #
V
Vehicles wit
ehicles wit h manual tr
h manual tr ansmission:
ansmission: shiTto
neutral. #
Load theve hicle onto the transpor ter. #
V
Vehicles wit
ehicles wit h aut
h automatic tr
omatic tr ansmission:
ansmission: shiTthe
automatic transmission toposition j. #
V
Vehicles wit
ehicles wit h manual tr
h manual tr ansmission:
ansmission: engage
/rst or reve rsege ar. #
Use the electric parking brake tosecure the
ve hicle against rolling away. #
Only secure theve hicle bythe wheels. V V
ehicles wit ehicles wit h adap
h adaptiv
tive dam
e dam ping adjus
ping adjustment tment &
W
WARNING
ARNING Risk of an accident when trans-
porting vehicles with adaptive damping
adjustment
When transpo rting vehicles with adaptive
damping adjustment, theve hicle/trailer com-
bination may begin torock and start toskid. #
Load theve hicle cor rectly onto the
transpor ter. #
Secure theve hicle on all four wheels
with suitable tensioning straps. #
Do not exceed the maximum permissible
speed of 60 km/h when transporting. *
N
NOOTE
TE Damage totheve hicle from secur-
ing it inco rrectly #
ATer loading, theve hicle must be
secured on all four wheels. Otherwise,
th eve hicle could be damaged. #
A minimum dis tance of 20 cm upwards
and 10 cm down wards must be kept to
th e transport platform. #
Secure theve hicle on all four wheels aTer
loading.
4MA
4MA TIC v
TIC v ehicles/v
ehicles/v ehicles wit
ehicles wit h aut
h automatic tr
omatic tr ans-
ans-
mission
mission #
Make sure that the front and rear axles come
to rest on the same transpor tation vehicle.
* N
NOOTE
TE Damage tothe drive train due to
incor rect positioning of theve hicle #
Do not position theve hicle abo vethe
connection point of the transport vehi-
cle. 358
358
Breakdown assis
tance

T
T
o
o wing ey
wing eye st
e st or
orag
ag e location
e location The
towing eye is located in the st owage space
under the boot 0oor. F
F
itting and r
itting and r emo
emoving t
ving t heto
he towing eye
wing eye #
Press the mark on co ver1 inwa rds and
re mo ve. #
Screw intheto wing eye clockwise as far as it
will go and tighten.
V
V ehicles wit
ehicles wit h a tr
h a trailer hitc
ailer hitc h:
h:vehicles with a trailer
hitch do not ha veare ar brac ketfo rth eto wing
ey e. Fasten theto w bar tothe trailer hitch. #
Make sure that co ver1 engages in the
bumper when youre mo vetheto wing eye.
* N
NO OTE
TE Damage totheve hicle due toincor-
re ct use of theto wing eye or trailer hitch When a
towing eye or trailer hitch is used to
re co ver a vehicle, theve hicle may be damaged
in the process. #
Only use theto wing eye or trailer hitch to
to w awa y or tow start theve hicle. #
Do not use theto wing eye or trailer hitch
to to wtheve hicle during reco very. T
T
o
o w
w -st
-st ar
arting t
ting t he v
he vehicle
ehicle V V
ehicles wit ehicles wit h aut
h automatic tr
omatic tr ansmission
ansmission
* NO
NOTE
TEDamage tothe automatic transmis-
sion due to tow-starting The au
tomatic transmission may be damaged
in the process of tow- starting vehicles with
automatic transmission. #
Vehicles with automatic transmission
must not be tow- star ted. #
Vehicles with an automatic transmission must
not be tow- star ted.
V V ehicles wit ehicles wit h manual tr
h manual tr ansmission
ansmission #
Obser vethe no tes on towing away
( / page 356). #
If necessar y,allow the engine and exhaust
system tocool down. #
Swit chon the ignition. #
Engage second gear. #
Release the electric parking brake. Breakdown assistance
359
359

*
N
NO
OTE
TE Inva lidation of the operating permit
due tofailure tocomply with the inst ruc-
tions for installation and use The operating permit may be in
validated if the
inst ructions for installation and use of two-w ay
ra dios are not obser ved. #
Only use appr oved frequency bands. #
Obser vethe maximum permissible out-
put po wer in these frequency bands. #
Only use appr oved aerial positions. 1
Front roof area
2 Rear roof area
3 Rear wings
4 Boot lid
On vehicles with a panoramic sliding sunroof, /t-
ting an aerial tothe front or rear roof area is not
permitted. On
there ar wings, it is recommended that you /t
th e aerial on the side of theve hicle closest tothe
cent reofthero ad.
Use Tech nical Speci/cation ISO/TS 21609 (Road
Ve hicles – "EMCs for installation of aTermar ket
ra dio frequency transmitting equipment") when
re tro/tting two- wayra dios. Comply with the legal
re qu irements for de tach able parts.
If yo ur vehicle has /ttings for two-w ayradio equip-
ment, use the po wer supply and aerial connectors
pr ov ided in the pre-ins tallation. Obser vethe man-
ufacturer's supplements when /tting.
T
T w
w o-wa
o-wa y r
y radio tr
adio tr ansmission output
ansmission output
The maximum transmission output (PEAK) at the
base of the aerial must not exceed theva lues in
th efo llowing table. 382
382
Te
ch nical data